MicroNote™ 132 Aircraft Lightning Protection A Shortcut to Selecting Transient Voltage Suppressors for RTCA/DO-160 Threats Featuring Microsemi’s New DIRECTselect™ Method by Mel Clark and Kent Walters Micronote 132 Power Matters.™ MicroNote 132 Aircraft Lightning Protection Table of Contents Background 3 Abnormal Voltage Characteristics 4 Definitions for Graphs 1-18 5 Using DIRECTselect – Examples for Waveform 5A 6 Clamping Voltage Significance 7 Selecting Lightning Protection for Waveform 5A 8 Protecting Across Power Distribution Lines 9 Multiple Surge Events 11 Summary and Conclusions 11 Acknowledgments and References 12 Index of DIRECTselect Graphs 13 Micronote 132 DIRECTselect Graphs and Data Tables 2 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 14-31 MicroNote is a trademark of Microsemi Corporation 2 Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning MicroNote 132Protection Aircraft Lightning Protection BACKGROUND Within the thin metal and composite shell of every jetliner, tens of thousands of sensitive semiconductor components are performing critical functions from navigation to engine control. Since aircraft are struck by lightning twice a year on average, protection of sensitive electronic devices providing a myriad of functions is essential to ensuring the safety of both passengers and crew. Although aircraft lightning threats are well defined in RTCA/DO-160, there are very few off-the-shelf transient voltage suppressors (TVSs) that are direct "plug-ins" rated for operating voltage and surge protection from the three waveforms and five levels of lightning threats defined in this document. Lengthy calculations must often be made to convert TVS surge ratings at standard 10/1000 µs to their equivalent values for specified aircraft lightning threats. In addition, matching a device with the threat can be cumbersome. Our MicroNotes 126, 127 and 130 illustrate these computations, providing a path from defined aircraft surge requirements to the parameters of available TVS products suitable for a given application. With those many resources, there is also Now a better way using Microsemi's DIRECTselect™ to quickly guide the designer to a suitable solution including considerations for elevated temperature deratings where applicable. DIRECTselect Method Here is how it works: Define your surge requirements as specified in DO-160F in Section 22, Induced Transient Susceptibility per waveform, 3, 4, or 5A and Threat Levels 1 through 5 as specified in Table 22-2. Herein are the threat levels for Pin Injection that define the most severe threats to your circuit. Most requirements combine Waveforms 3 and 4. Since Waveform 4 (6.4/69 µs) is more severe, by a factor of 3.8 [1], we have included only Waveform 4 on our charts for simplicity. Values of Waveform 3 only, when required, are easily calculated using the guidance in MicroNote 127 [2]. For reference, Waveforms 3, 4, and 5A are illustrated in Figures 1, 2 and 3 respectively Figure 1. Waveform 3 Figure 2. Waveform 4 Figure 3. Waveform 5A Micronote 132 Figure 4. Matrix of Threat Levels 1 through 5 from Table 22-2 in RTCA/DO-160. 3 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 3 MicroNote is a trademark of Microsemi Corporation MicroNote is a trademark of Microsemi Corporation MicroNote 132 MicroNote 132 Aircraft Lightning Protection Aircraft Lightning Protection This table defines the peak open circuit voltage (Voc) and peak short circuit current (Isc) for each of the waveforms listed. In making your TVS selection, maximum Working Standoff Voltage (VWM) values are required along with the Peak Pulse Current (IP) threat, where the graphs shown on pages 14 thru 31 are plotted with IP vertically and VWM horizontally. The IP as displayed on the graph must exceed the curve depicting the current limit of the Threat Level. Examples will lead you through the selection process. Individual graphs exist for each TVS product family and are arranged in ascending order of power rating and surge current from 500 W up through 30,000 W. These graphs are also a further extension of information in Tables 1 and 2 of MicroNote 130 [3] with added consideration for 70°C and 100°C. Graphs 1 through 9 are associated with Waveform 4 and Graphs 10 through 18 are associated with Waveform 5A. Each graph is accompanied by a supplemental table containing multiple data points from which each curve was derived, plus a list of the applicable Microsemi products for use with these specific surge current threat levels. This presentation provides direction for TVS selection for a broad distribution, from low voltage, low level lightning threats on data lines up through high levels for power distribution lines. ABNORMAL VOLTAGE CHARACTERISTICS Other critical voltage parameters for selecting TVS products may sometimes include extended Surge Limits associated with abnormal voltage. These are maximum excursions above the nominal operating voltage. Surges differ from transient voltage in that they are long term Abnormal Voltage Characteristics with high-line voltages extending for durations of tens, up to hundreds of milliseconds that can destroy TVSs. Micronote 132 These voltage anomalies are caused by normal generator functions and must be considered in TVS selection. An example of the ac abnormal voltage surge curve, displaying voltage vs time is shown in Figure 16-5 of the RTCA/DO-160, Section 16 specification as illustrated below in Figure 5: Figure 5. Envelope of AC Abnormal Voltage Surges from Figure 16-5 in RTCA/DO-160 The normal operating voltage values in this graph are for 115 V rms. The rms values must be converted to peak ac values for comparing TVS parameters since the TVSs are characterized for peak, not rms values. A TVS will not withstand the long surge durations of abnormal voltage surge. They must be selected so that the maximum Peak Working Voltage, VWM, is equal to or greater than the peak abnormal voltage. Higher magnitude short transients well beyond these voltages such as found in Waveform 3, 4 and 5A are still clamped after exceeding the VBR of the properly selected TVS. For 230 V rms lines, double the values shown in the graph above [4]. 4 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation 4 Copyright © 2013 Microsemi Corp. MicroNote 132 MicroNote 132 Lightning Protection AircraftAircraft Lightning Protection DC power lines are also plagued with the same anomaly, abnormal dc voltage surge, resulting from voltage excursions produced by the generators. For dc power, there are three categories of surge voltage as shown in RTCA/DO-160, Section 16, Figure 16-6 as also shown below in Figure 6. Figure 6. Typical Abnormal DC Voltage Surges per Figure 16-6 in RTCA/DO-160. Note that there are 3 categories of abnormal voltages for 28 V nominal and with 100 ms worst case surge, similar to the ac power lines. Three levels of abnormal voltages are listed; Category A, B and Z with the most common requirement being Category B. For 14 V dc requirements, divide these upper voltage limits by 2 for the applicable values [5]. As with the envelope for the ac voltages, the VWM of the TVS must be equal to or greater than the abnormal voltage limit. For exceptions, consult factory. DEFINITIONS FOR GRAPHS 1 THROUGH 18 The green, blue and yellow curves represent the ratings of the TVS device in terms of rated Peak Pulse Current (IP) at ambient temperatures. The IP is shown in the vertical axis and Working Voltage (VWM) in the horizontal axis. The green curve on each graph depicts the peak surge current rating versus working voltage at 25°C along with additional curves for derating to 70°C (blue curve) and 100°C (yellow curve). The red Curves, represent the Pin Injection current threat levels as defined by the RTCA/DO-160 specification and are labeled accordingly. If the curve for the applicable ambient operating temperature is above the red curve designating the maximum threat level, the TVS device will perform at that threat level. Only those levels that are applicable for the associated device families are included on the graph. The eighteen individual graphs in this document cover the entire DO-160 threat range. Nine of these graphs display surge threats and surge capability of the TVSs for Waveform 4 (6.4/69 µs) and nine display this same information for the more severe Waveform 5A (40/120 µs). Values shown on the graph include the +20% high side tolerance of the pulse widths. GRAPH OVERVIEW Each graph is derived from the peak pulse current (IPP) levels at 10/1000 µs ratings of the product data sheet. For the shorter aircraft transients, the power levels are higher, by a factor of 3.33x for the 6.4/69 µs waveform and 2.33x for the 40/120 µs waveform and are labeled as IP. These multiplication factors include the +20% tolerance of the threat duration [6]. For Waveform 4, the graph numbers and associated TVS power levels with part types are listed on the following page. Except for 1Nxxxx part numbers shown that already have military qualifications, add M prefix for source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in MicroNote 129. 5 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation 5 MicroNote is a trademark of Microsemi Corporation Micronote 132 Based on requests from the aerospace industry, Microsemi devices meet the vast majority of needs. If no part exists for a given voltage and surge current rating, custom components can be designed. Consult the factory for these options. MicroNote 132 AircraftMicroNote Lightning132 Protection Aircraft Lightning Protection Graph Number TVS Power Level @ 10/1000 µs Product Series (more details on graphs) 1 500 W 2 3 600 W 1500 W 4 5 6 7 8 9 3000 W 5000 W 6500 W 7500 W 15,000 W 30,000 W 1N6103A-1N6137A, 1N6461-1N6468, 1N8073-1N8109, P5KE, SMBJSAC P6KE, SMB 1N5629A-1N5665A, 1N5907, 1N5908, 1N6036A-1N6072A, 1N6138A-1N6173A, 1N6469-1N6476, 1N8110-1N8146, 1.5KE, SMC, SMCJLCE SML 5KP PLAD6.5KP PLAD7.5KP 15KP, PLAD15KP PLAD30KP A more complete listing of each product series is shown on its associated graph. NOTE: A second series of graphs (10 through 18) are also included for Waveform 5A and contains equivalent information on the product series as waveform 4 above with threat levels increased to the magnitude of waveform 5A. USING DIRECTselect - EXAMPLES FOR WAVEFORM 4 For our first example, let's consider a low level transient voltage threat to an ARINC - 429, +/- 5 V data line. For this illustration, the lightning threat requires protection from Waveform 4, (6.9/69 µs) Level 3 (300Voc/60Isc). Applications with voltages going in both positive and negative directions require bidirectional TVS devices. We know the selection will be within the first few of the seven graphs because of the relatively low current rating requirement. Since the lowest voltage devices have the highest current ratings, the device would most likely be found on the first one or two graphs. In reviewing Graph 1, the 500 W TVS at 5 V working voltage (VWM) has a peak current rating of 180 A. This is O well above the necessary requirement of 60A for Level 3 with margin for temperature derating up to 100 C. In the supplementary table, data points for these graphs are provided that include the major parameters: Peak Pulse Current (IPP), Clamping Voltage (VC), and VWM. Exact values not shown can be extrapolated from this data. Micronote 132 Device selection for the ARINC - 429, Slow Data rate signals, 10-11 kHz, would be the SMBJ5.0C or SMBJ5.0CA. For the Fast Data rate signals at 100 kHz, the selection would be the SMBJSAC5.0 with low capacitance of 30 pf or less. Two of these devices are required in anti-parallel to achieve bidirectional protection. Refer to the data sheet on Microsemi's web site for complete information on installing this part. The selection shown is a surface mount device; however these parts are also available in axial-leaded configurations. In our second example, a TVS is required for performance to Waveform 4 (6.4/69 µs), Level 3 (Voc300V/Isc60A) for +/-48V ac. This application also requires a bidirectional device and must have a higher power rating than in the previous example because its operating voltage is significantly greater. Since silicon TVSs provide the same power rating within a series (PPP = IPP x VC), the current rating will be about one-tenth of the value for a 48 V TVS compared to a 5.0 V device in the same series. However, the peak pulse power requirement is greater for this application, so we continue our search among the graphs for a higher power device. In Graph 3, for the 1500 W series, we find that the current withstand (IP) of a 48 V device @ 25°C is 64 A while the requirement is 45 A at 48 V. It is interesting to note that the specified requirement of 60 A per Table 22-2 is reduced significantly by the clamping voltage subtracting from the driving voltage [7], thus proportionally reducing the surge current. This is reflected in the downward slope of the Level 3 Curve. The SMCJ48CA, (CA suffix denoting bidirectional performance for ac) or equivalent will meet the surge requirements at 25°C and 70°C but is marginal at 100°C. The next level up, the 3000 W series is recommended for 100°C performance if required (see Graph 4). Why are the “driving” current threats (IS) of Levels 1 through 5 reduced with increasing voltage? Because the clamping voltage of the TVS subtracts from the open circuit driving voltage, thus lowering the driving current as illustrated in the following equation: 6 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 6 MicroNote is a trademark of Microsemi Corporation Copyright © 2013 Microsemi Corp. MicroNote 132 MicroNote 132Protection Aircraft Lightning Aircraft Lightning Protection Where: Is = (Voc - Vc) / Zs (Eq. 1.) = (300 V - 77.4 V) / 5 ohm = 44.5 A Is = peak driving current of surge through the TVS Voc = open circuit voltage - 300 V Vc = Max clamping voltage of SMCJ48CA Zs = Source impedance of driving voltage - Voc / Isc In this equation, we see the Voc open circuit voltage of 300 V is reduced to 222.6 V, with a corresponding reduction of surge current to 44.5 A, or about 25% below the value of 60 A for the Isc specified for Level 3. CLAMPING VOLTAGE SIGNIFICANCE The purpose of the TVS is to clamp the voltage spike to a level below the failure threshold of the components it is protecting. The failure threshold voltage is not the operating voltage of the protected device. All components have a margin between rated value and transient failure threshold which is usually not specified by the manufacturer. Maximum operating voltage levels specified on data sheets for ICs and power transistors are for steady state conditions while most components can tolerate short term voltage spikes of less than 150 µs up to 50% greater values than the operating voltages. Normally the higher the voltage of the protected device, the more narrow the margin in percentage between maximum operating voltage level and voltage spike failure level. For example, a 400V rated switching transistor can usually tolerate a clamping level of 420 V or more, which is about 5% greater than its steady state operating level. In comparison, a 5 V to 15 V UART (universal asynchronous receiver transmitter) can normally withstand a 50% or greater voltage clamp above its maximum operating level. Manufacturers are reluctant to provide any other than the maximum operating voltage. The above failure threshold values are based on the writer's experience, including test measurements. Our third example of protection is for a 48 V signal line monitoring status of voltage across a relay. The threat is Waveform 4, Level 4 (750Voc/150Isc). This takes us to a higher power level device requirement that we find is the 5000 W rated TVS shown in Graph 5. The peak current protection is more than twice that for our previous example, so we look for a TVS with higher power that will withstand this higher peak current surge. Observing the VWM of 48 V at Level 4 in graph 5 for 5000 W devices, we see that the maximum peak current rating for this voltage is approximately 210A @ 25°C. The derating graphs indicate that this part will operate safely at 70°C but marginal at 100°C. For 100°C performance, the higher power PLAD6.5KP48A surface mount TVS in Graph 6 or the PLAD7.5KP48A in graph 7 is recommended. A unipolar device was selected because this is a dc application. Clamping of the negative transients is through the diode in the forward direction that can withstand higher surge currents than in the avalanche mode. A fourth example of protection continues when ascending to a higher threat level protecting from a transient surge per Waveform 4, Level 5 (1600Voc/320Isc). Operating conditions are on a 28 V dc power distribution line that must withstand an abnormal voltage condition of 60 V maximum, Category B [4]. The 15,000 W axial-leaded devices are often made using 3-stacked chips that have been considered the most economical method for higher power surge suppressors. The PLAD15KP series is made up of a single larger chip in a surface mount package for the same power rating as well as two stacked chips for twice the P PP rating at 30,000 W with the PLAD30KP series. With fewer internal chips stacked in series, it also allows lower voltages in these PLAD product series families where they start at 7 V and 14 V respectively. This can also be very useful for generating higher peak pulse power options as we shall observe in further examples for the severe Waveform 5A. 7 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation 7 MicroNote is a trademark of Microsemi Corporation Micronote 132 Continue working your way further into the pages noting that in Graph 8 the 15,000 W TVS series will withstand surge currents of greater than 320 A at a voltage level of 60 V and 100°C. Above 60 V, a TVS will not conduct during the abnormal condition but will withstand a surge > 320 A for this Waveform 4, Level 5 threat. A good selection for this application in Graph 8 would be a 15KP64A or PLAD15KP64A. Verify that the clamping voltage is compatible with the maximum failure threshold voltage of the protected circuit / component. This device is rated for approximately 500 A at 25°C. It has a clamping voltage of 104 V at its rated peak pulse current (Ipp) as extrapolated from the graph/data table. This device has a significant margin of about 60% at 25°C that can be derated to 100°C with a margin of safety. MicroNote 132 MicroNote 132 Aircraft Lightning Protection Aircraft Lightning Protection Our fifth example is one in which a 125 V dc status monitoring signal line must be protected from conditions of Waveform 4, Level 5 (1600Voc/300Isc) in a 70°C ambient. Continue on to Graph 9 and locate the coordinates for the required performance. At 130V, the PLAD30KP130A device has a 6.4/69 µs rating of 470 A at 25°C and 380 A at 70°C; and 330A for 100°C. This selection should perform well for the application. SELECTING LIGHTNING PROTECTION FOR WAVEFORM 5A Waveform 5A is defined as having a waveform, of 40/120 µs +/- 20%. Calculations in the following examples are based on the +20% worst case, increasing the pulse duration from 120 µs to 144 µs maximum. Graphs 10 through 18 depict curves for Waveform 5A. These protection levels are developed in the same manner as those for Waveform 4 but with lower IPP device ratings attributed to the longer Waveform 5A. The increase in surge current / power for Waveform 5A is only 2.33 times the peak current value for a given device @10/1000 µs found in Microsemi data sheets as stated earlier. Referring to Figure 4 on page 3 and the column for Waveform 5A, note that the voltage spike amplitudes are identical to those for Waveform 4. However, the Isc current is higher by a factor of 5 because of the lower source impedance of only 1 ohm compared to 5 ohms for Waveform 4. Another component of the increased threat for Waveform 5A is its 74% longer duration compared to Waveform 4. The more severe conditions of Waveform 5A are attributed to applications involving closer proximity of lightning source including those conductors close to the skin of the aircraft, areas containing a higher density of composite materials, long power distribution lines, and long signal line runs within the airframe plus a myriad of others. From the writer's experience, ac and dc power distribution systems may be located in areas requiring protection from Waveform 5A surges, depending on the airframe structure. With the large amounts of composite materials used in construction of newer aircraft, both power and data lines are subjected to more severe lightning threats. Most threats presented by Waveform 5A appear to be Level 4 (750Voc/750Isc) based on the writers experience. Typical Waveform 5A Level 4 threats require the higher 30 kW product ratings for protection. Multiple 30 kW devices are often wired in series or parallel to provide the surge current withstand capability for Level 4, Waveform 5A threats. Although there have been no requests, TVS devices for Level 5 threats can be designed to also meet these requirements. Example 1 protecting from Waveform 5A threats is that of a 125 V dc status signal line subjected to Level 2 (125Voc/125Isc). This is an easy one to solve since the operating voltage and threat are at the same level. There will be zero voltage impressed on the line because it is of the same value as the threat, hence no current is driven into the 125 V signal line and no protection is required (see EQ.1). For this same threat at lower operating voltages, protection will be required as shown in the following example. Micronote 132 Example 2 protection from Waveform 5A is one where a low speed 32 V bidirectional signal line is exposed to a Level 2 (125Voc/125Isc) threat. ARINC-429 and most other signals are run through shielded wiring that provides significant lightning protection, also the line impedances are quite high, further reducing lightning threats. This issue was discussed earlier in the section on protecting from Waveform 4 threats. For this requirement, the solution is found on Graph 13 for the 3000 W device. The closest fit is the SMLJ33CA (33V VWM) that can be derated for 100°C performance. This is a compact surface mount device in the DO-214AB with J bend tabs. The SMLJ series is a frequent choice for signal line protection from harsh lightning conditions. Example 3 for a Waveform 5A threat from Level 3 (300Voc/300Isc) lightning exposure, is for a 12 V power supply. The 3000 W device in Graph 13 will protect up to 70°C as observed on the coordinates; however, for protection at 100°C ambient levels, the 5000 W device depicted in Graph 14 is required where the 5KP12A axial leaded device is recommended. For surface mount, the PLAD6.5KP12A is recommended in Graph 15. Example 4 is more challenging protecting a 48 V off-line switching power supply with a 100 V rated transistor and Waveform 5A, threat Level 4 (750Voc/750Isc). Ambient operating temperature is 100°C and the power is 8 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation 8 Copyright © 2013 Microsemi Corp. 132 MicroNoteMicroNote 132 Aircraft Lightning Aircraft Lightning ProtectionProtection Category B with a maximum abnormal voltage surge of 60 V for 100 ms previously described in Figure 6. Since a TVS will not withstand the power delivered by a 100 ms surge, 60 V becomes our defacto operating voltage. From Graph 18 for the 30,000 W TVS, our highest powered device for this voltage (PLAD30KP60A) will withstand a peak current of 727 A at 40/120 µs, (with VC of 96.8 V) only 74 A above the threat level of 653 A at 25°C (see Eq.1). This is a close margin, but more than adequate to meet this requirement. A further level of creativity is required to meet higher temperature requirements. One option to increase surge current capability is to use two devices of the same voltage type matched in parallel, providing twice the current capability of a single device to meet the often required 100°C ambient. They must be matched under surge conditions to ensure near equal voltage for sharing the current evenly. Two each of a 30KPA60A matched in parallel will provide the necessary protection up to 100°C with an approximate 50% safety margin. Special selected matched devices can be avoided by using two of the PLAD30KP30A in series for surface mount applications. The clamping voltage for the two devices in series is conservatively estimated to be 100 V maximum, the same value as the maximum rated operating voltage of the protected device [8]. Using two or more of the same lower voltage TVS devices in series (if available) where the voltage adds up to the desired V WM value is recommended when surge currents are beyond the capability of a single TVS of a higher selected VWM value. Multiple devices can be used as long as they are of the same type or of higher current rating when an equally divisible required number is not available. PROTECTING ACROSS POWER DISTRIBUTION LINES For protection across high voltage ac power distribution lines, there is the option of stacking lower voltage, higher current rated devices in series to compensate for the inherently lower surge current ratings of high voltage TVSs. This is particularly applicable for high VWM applications requiring high surge current protection across ac distribution from a Waveform 5A Level 4 threat (750Voc/750Isc). Example 5 is for an application across a 115V ac distribution line having an Abnormal Voltage of 255 V peak from 180 V rms (see Figure 5) feeding a switching power supply. A maximum clamping of 420 V is required for protection of the 400 V rated transistor within the supply. A few well chosen parts can be stacked in series which have a clamping voltage of 420 V maximum and still meet the surge current and a working voltage level equal to or slightly above the 255 V, 100 ms abnormal high voltage condition. When reviewing the selection of available PLAD30KPxxx series devices and comparing the listed IPP, remember that the current rating in the data sheet is for a 10/1000 µs waveform and Waveform 5A is 40/120 µs. Per the section on Graph Overview herein (page 5), the 10/1000 µs surge current rating is multiplied by 2.33x to obtain its higher value for the shorter 40/120 µs pulse width. For example, we first calculate the true surge current (Is) of the Level 4 threat to the power supply using 400 V switching transistors with 420 V transient capability. (Eq. 2) IS = (Voc - Vc) / Zs = (750V - 420V) / 1 ohm = 330 A From this simple calculation, we find the threat @ 25°C is 330 A at 40/120 µs. Next we review the TVS devices available from the 30 kW ratings at 10/1000 µs such as the PLAD30KPxxx data sheet to select TVSs that provide the desired electrical parameters with surge capability of 330 A plus derating for high temperature performance. IP at 40/120 µs = 2.33 x IPP at 10/1000 µs = 2.33 x 142 A = 331 Amps max IPP 9 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 (Eq. 3) MicroNote is a trademark of Microsemi Corporation 9 MicroNote is a trademark of Microsemi Corporation Micronote 132 Our target working voltage is 255 V peak, the worse case abnormal high voltage condition, or slightly higher, but still meeting conditions of maximum surge current and clamp voltage. For a trial fit on this severe requirement, we divide the working voltage by two, with a resulting value of 127.5 V which is closely rounded up to 130 V providing a PLAD30KP130CA option. Total clamping voltage of these parts in series is 2 x Vc, (Vc is 209 V) resulting in 418 V. The peak pulse current of the PLAD30KP130CA for the 40/120 µs Waveform 5A is: MicroNote 132 MicroNote Protection 132 Aircraft Lightning Aircraft Lightning Protection Just a reminder that IP is used to denote peak current rating at a waveform other than 10/1000 µs while IPP is the 10/1000 µs data sheet rated peak pulse current. This limit of 331 A for the TVS is approximately equal to that calculated for this surge event of 330 A in Eq. 2, and is only suitable for 25ºC ambient temperatures, with no margin for derating to higher temperatures. When using multiple TVS devices in series resulting in higher V C values, the calculations in Eq. 2 indicate the red threat level curves decline in value or effectively shift to the left with respect to the individual VWM voltages for each TVS device used in series. This also results in improved margin of the green, blue and yellow performance curves relative to the IS calculations for threat level curves where the 18 graphs only show IS relations for individual TVS devices. Three devices in series will provide a greater surge protection level. Dividing 255 V by three provides a PLAD30KP85CA for a surface mount package option with a clamp voltage of 137 V each. Total clamp voltage for the three parts in series is the additive values or 137 V x 3 yielding 411 Volts on the PLAD example where V C is still conservative for the 420 V minimum requirement. The peak surge current (IP) rating for these three devices rated for a 4/120 µs, Waveform 5A is derived in the same manner as in the previous example yielding 508 A for IP that provides a 54% increased margin from 330 A in Eq 2 and can also be conservatively derated to 100°C. In this example, the stacked devices were all the same voltage without fractional values remaining. If this is not the case, use a lower voltage device which matches closest when added together but is still above the system operating voltage. Example 6 is for protection across 230 V ac lines requires performance at an abnormal voltage surges up to 360 V rms or 509 V peak for 100 ms that is twice the value in figure 5, shown on page 4. TVS protection voltage levels are double the values previously illustrated for 115V. The same techniques are used for selecting lightning protection devices. In some applications where narrow margins exist between operating voltage and clamping voltage, the designer is encouraged to consult the factory for assistance. Example 7: For protection across 28 V, Category B dc bus lines, threat Level 4 of Waveform 5A, the net surge current is higher resulting from the lower clamp voltage as shown with a PLAD30KP60A selected for protection. This 66.7 V minimum breakdown device will adequately meet the 60 V for 100 ms, “Abnormal Voltage” condition. IS = (Voc - Vc) / Zs = (750V - 96.8V) / 1 ohm = 653 A (Eq. 4) The Level 4 surge current threat for a 28 V dc line is almost double that for the 115 V ac requirement previously shown since the clamping voltage of 96.8 V is far less across the ac power line in equation 4 above. The IP of the PLAD30KP60A for a 40/120 µs pulse is 312 x 2.33 = 727 Amps providing a margin of 11% above the IP requirement of 653 A for a 25°C ambient. Micronote 132 Many applications require the lowest clamping voltage that can be attained. Since the abnormal surge voltage does not exceed 60 V, using a device with a breakdown voltage equal to this value has been acceptable for most applications. Lower voltage TVSs providing lower clamping voltage than the PLAD30KP60A described above include the PLAD30KP58A and PLAD30KP54A. Minimum breakdown voltages at 25°C are 64.4 V and 60.0 V respectively on the PLAD products with minimum clamping voltages of 93.6 V and 87.1 V respectively. Maximum I P for the PLAD30KP54A is 797 A at 40/120 µs or 2.33 x 342. Let's also compare this to the Waveform 5 Level 4 threat limit calculation. IS =(Voc - Vc) / Zs = (750V - 87.1V) / 1 ohm = 662.9 A (Eq. 5) Compared to the PLAD30KP60A, the PLAD30KP54A offers 9.9 Amps of additional current protection and a lower clamping voltage by 9.7 V for protecting more sensitive components. Although the lower end of the breakdown voltage (VBR), is identical to the maximum Abnormal Voltage (60.0 V), the TVS will draw current when the temperature drops below 25°C for example, since TVS devices have a positive temperature coefficient of voltage. However the current drawn by the TVS will be minimal and only sufficient to maintain a breakdown voltage equal to the maximum Abnormal Voltage during this brief time period of 100 ms. For a power line, this small amount of extra current drawn for heating the TVS should present no problem. 10 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 10 MicroNote is a trademark of Microsemi Corporation Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning Protection MicroNote 132 Aircraft Lightning Protection When comparing this analysis of a 54 Volt VWM in Graph 18 for Level 4 protection, it is apparent this is sufficient for 25°C but not for 70°C or above. For higher ambient temperatures as in earlier examples, the easiest practice is to place two devices in series of one-half the voltage of the PLAD30KP54A. This is available in the surface mount series with the PLAD30KP28A to almost double the surge current or three devices with the PLAD30KP18A to triple the surge current capabilities. In those TVS series where these lower voltage selections have not been previously available (such as in the older 30KPxxx axial-leaded series), the alternative for increasing surge current capability is with matched parallel devices. Voltage matching is performed under surge conditions to ensure a very close match, typically within the range of +/- 0.5%, for even load sharing between devices. This is normally performed by the manufacturer. Parallel matched TVSs for aircraft lightning protection and general heavy duty surge protection have been in use for several decades and have a record of proven performance. This method has also been thoroughly tested in battle performance in military ships and aircraft. For higher current applications using single components beyond the limitations of Microsemi's 30,000 watt devices, there is the RT130KP275CV thru 295CV or CA series, which is rated at 40,000 W for 10/1000 µs. They are characterized for Waveform 4, 6.4/69 µs and available in voltages intended for protection across 115 ac lines including abnormal high voltage conditions. Using the conversion equations reviewed in MicroNote No. 127, they may be applicable for other protection requirements confronted by the designer. Copies of the RT130KP275CV thru 295CV or CA series data sheets can be downloaded from our web site at www.microsemi.com . MULTIPLE SURGE EVENTS Further inquiries have been made for devices to withstand multiple surge events as also defined by RTCA/DO-160. The profile of the surge consists of a maximum value followed by multiple strokes. Since there is cumulative heating effects from these multiple surges, the lower thermal resistance junction to case (bottom) of the PLAD designs make them a better choice. Also reference MicroNote 133 on our web site [9]. SUMMARY / CONCLUSIONS This document is the fifth in our series of MicroNotes providing selection guidance specifically for the avionics design engineer (the others include MicroNotes Nos. 126. 127, 130, and 133). It translates the data sheet peak pulse current ratings of the 10/1000 µs waveform into the surge rating equivalents to meet the Waveform 3, 4 and Waveform 5A threats described in RTCA/DO-160. A matrix of graphs for each device family from 500 W peak pulse power up through 30,000 W has been derived for surge ratings of each device family at 25°C, 70°C, and 100°C for the above threats. Each graph is supported with a table listing the data sheet electrical parameters for the individual components listed along with calculated data points for the curves. Using the examples and guidelines in the text, the designer is able to select directly from the graph of a device to fit his requirement with minimal calculating and guesswork. We expect those using this document to save valuable design time by more rapidly selecting a TVS correctly rated for a given application. 11 www.Microsemi.com Copyright 2013 Microsemi Corp. www.Microsemi.com Rev 1; 9/10/2013 Rev 1: 11/2013 11 MicroNote Microsemi Corporation MicroNoteisis aa trademark trademark of of Microsemi Corporation Micronote 132 This is our second issue at presenting this information in graph selection format. We expect other revisions to keep up with the emerging technologies and updates of the RTCA/DO-160 specification and its latest revision. We also still recognize there is room for modifications to make this document more user friendly. To help achieve this goal, constructive comments from the user are welcome. It is Microsemi's desire to provide the design engineer with the most up to date design information to assist in achieving his/her goal more efficiently. MicroNote 132 Aircraft Lightning Protection MicroNote 132 Aircraft Lightning Protection ACKNOWLEDGEMENTS For additional technical information, please contact Design Support at: http://www.microsemi.com/designsupport or Kent Walters ([email protected]) at 602-458-3212 REFERENCES Clark, O. M., MicroNote™ No. 127, Microsemi Corp., pg. 6 Clark, O. M., MicroNote No. 127, Microsemi Corp., pg. 6 Walters, K., MicroNote No. 130, Microsemi Corp., RTCA/DO-160E, Section 16, Figure 16-5, pgs. 16-37 RTCA/DO-160E, Section 16, Figure 16-6, pgs. 16-38 Clark, O. M., MicroNote No. 127, Microsemi Corp., pg. 10 Clark, O. M., MicroNote No. 127, Microsemi Corp., pg. 17 Clark, O. M. and Walters, K. MicroNote No. 112, Microsemi Corp. Walters, K., MicroNote No. 133, Microsemi Corp. Micronote 132 [1] [2] [3] [4] [5] [6] [7] [8] [9] 12 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation 12 Copyright © 2013 Microsemi Corp. MicroNote 132 MicroNoteProtection 132 Aircraft Lightning Aircraft Lightning Protection Index to DIRECTselect Graphs and Datapoints Waveform Rating Power* Pg # Graph 1 Waveform 4 500 W 14 Graph 2 Waveform 4 600 W 15 Graph 3 Waveform 4 1500 W 16 Graph 4 Waveform 4 3000 W 17 Graph 5 Waveform 4 5000 W 18 Graph 6 Waveform 4 6500 W 19 Graph 7 Waveform 4 7500 W 20 Graph 8 Waveform 4 15,000W 21 Graph 9 Waveform 4 30,000W 22 Graph 10 Waveform 5A 500W 23 Graph 11 Waveform 5A 600W 24 Graph 12 Waveform 5A 1500W 25 Graph 13 Waveform 5A 3000W 26 Graph 14 Waveform 5A 5000W 27 Graph 15 Waveform 5A 6500W 28 Graph 16 Waveform 5A 7500W 29 Graph 17 Waveform 5A 15,000W 30 Graph 18 Waveform 5A 30,000W 31 Index Graph # * Power rating at 10/1000 µs 13 www.Microsemi.com Copyright 2013 Microsemi Corp. Rev 1; 9/10/2013 www.Microsemi.com Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation 13 MicroNote is a trademark of Microsemi Corporation MicroNote 132 Aircraft Lightning Protection Graph 1: RTCA/DO-160, Waveform 4, Levels 1 through 4, 500 W TVS Series Waveform RTCA/DO-160 using 500 W TVS Diodes Waveform 4 4RTCA/DO-160E using 500 W TVS Diodes Waveform 4 RTCA/DO-160 using 500 W TVS Diodes V 5 6 7 V 5 6 7 8 V V 9.2 9.2 10.3 10.312.0 12.0 13.6 o o o IPP 500 W IPP 500 W 10/1000 µs 10/1000 µs A A IP 25 oC C IP 25 6.4/69 µs 6.4/69 µs A A oC C P 70 IP I70 6.4/69 µs 6.4/69 µs A A 100o C IPIP100 C 6.4/69 µs 6.4/69 µs A A 11 50V/10A 50V/10A A A A A 54.3 54.3 48.5 48.541.7 179 179 160 160 138 146 146 131 131 113 125 125 112 112 96.6 8.2 8.2 7.9 7.9 7.6 23.1 23.1 22.9 22.9 22.6 58.2 58.2 57.9 57.9 57.6 7.2 22.8 22.8 21.9 21.9 21.6 57.2 57.2 56.9 56.9 56.6 21.0 21.0 20.1 19.2 20.1 56.0 56.0 55.1 54.2 55.1 19.2 54.2 41.7 36.7 138 121 113 99 96.6 7.6 84.7 8 9 9 10 10 13.615.4 15.417.0 17.0 36.732.5 32.529.4 29.4 121 107 10797 97 9988 88 79.5 79.5 84.7 74.9 74.9 67.9 67.9 7.2 7.0 7.0 6.6 6.6 12 15 15 18 18 19.924.4 24.429.2 29.2 25.120.6 20.617.2 17.2 8368 6857 57 68.0 55.8 46.7 55.8 46.7 58.1 47.6 39.9 47.6 39.9 6.0 5.1 4.0 5.1 4.0 20 28 28 30 30 36 32.445.4 45.448.4 48.458.1 15.411.0 11.010.3 10.38.6 5136 3634 3429 29.5 41.8 27.9 29.5 27.9 23.7 25.2 35.7 23.8 25.2 23.8 20.3 0.9 3.5 0.9 36 40 48 58.164.5 77.4 8.6 7.8 6.5 2926 22 21.3 23.7 18.0 18.2 20.3 15.4 12 20 Graph 1 VC VC ** Peak Surge Surge Currents Currentsfor forthe theRed RedCurves Curves IISS Threat Threatfor forLevels Levelsshown shownonongraph graph Threat ThreatLevels Levels1-4 1-4 40 48 50 60 19.9 32.4 64.5 77.4 80 96.8 25.1 15.4 7.8 6.5 6.0 5.2 83 51 26 2220 17.3 68.0 41.8 21.3 18.0 16.4 14.2 58.1 6.0 35.7 3.5 18.2 15.4 14.0 80 113 96.8 113 126 6.0 4.4 5.2 4.4 4.0 20 14.5 17.3 13.3 14.5 16.4 11.9 14.2 10.9 11.9 14.0 10.2 12.1 9.3 10.2 90 146 3.4 11.3 9.3 7.9 22.6 21.6 57.6 56.6 18.5 15.9 18.5 15.3 15.9 53.5 50.9 53.5 50.3 50.9 15.3 13.4 12.1 13.4 9.5 12.1 9.5 12.1 50 70 60 70 80 2 3 4 2 3 4 125V/25A 300V/60A 750V/150A 125V/25A 300V/60A 750V/150A A A A o Over Over limitlimit 25 oC25 C VWM VWM Conversiontoto6.4/69 6.4/69µsµsI IPValues Values Conversion P A 148.2 148.2 147.9 147.9 Over limit 25 oC W TVS @10/1000 500 500 W TVS @10/1000 µs µs Over limit 25 oC Data Points for Curves Data Points for Curves inGraph Graph Data Points for Curves in in Graph 1 11 Microsemi TVsTVs PartPart Numbers Microsemi Numbers compliant to RTCA/DO-160E compliant to RTCA/DO-160 Standard Capacitance Standard Capacitance • Axial Lead • Axial Lead P5KE5.0A-170A, CA P5KE5.0A-170A, CA 1N6103A-6137A 1N6103A-6137A 1N6461-6468 1N6461-6468 • Surface Mount SMAJ5.0A-170A, CA Low Capacitance Low capacitance • Axial Lead • Axial SAC5.0-50 Lead SAC5.0-50 • Surface Mount SMBJSAC5.0-50 • Surface Mount HSMBJSAC5.0-50 50.3 Except for 1Nxxxx part numbers shown that already have military qualifications, add M prefix for source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. 80 100 126 162 4.0 3.1 13.3 10.9 9.3 10.2 8.4 7.1 90 146 3.4 11.3 9.3 7.9 * Surge currents voltage (see Eq. 100 162 are reduced 3.1 by clamping10.2 8.41). In the table 7.1 above, the first three columns, VWM, VC, and0 IPP 500 W 0are taken from the data sheet while the subsequent three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since 14 * Surge currents are reduced clamping voltagetemperatures. (see Eq. 1). In the table above, the first three columns, VWM, VC, and IPP 500 W are taken from the data sheet while the subsequent many TVS devices requireby derating for higher 0 0 three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since © 2006 Microsemi Corporation many TVS devices require derating for higher temperatures. www.Microsemi.com Rev 1: 11/2013 14 Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning Protection Graph 2: RTCA/DO-160, Waveform 4, Levels 1 through 4, 600 W TVS Series WaveformWaveform 4 RTCA/DO-160E using 600600 WW TVS Diodes 4 RTCA/DO-160 TVS Diodes Waveform 4 RTCA/DO-160E usingusing 600 W TVS Diodes DataPoints Pointsfor for Curves Graph Data Curves in in Graph 2 2 2 Data Points for Curves in Graph V V 5 6 7 5 6 7 8 9 10 12 15 18 36 40 48 50 60 70 12 15 18 20 28 30 36 40 48 50 60 70 VC V V IPP W 600 W IPP 600 10/1000 10/1000 µs µs A A oC oC IP 70 IP 25IPo25 C oC IP 70 6.4/69 6.4/69 6.4/69 µs µs 6.4/69 µs µs A A A A oCoC IP 100 IP 100 6.4/69 6.4/69 µsµs AA 11 50V/10A 50V/10A AA 22 125V/25A 125V/25A AA 3 300V/60A 300V/60A A A 44 750V/150A 750V/150A AA 8.2 8.2 7.9 7.9 7.6 23.1 23.1 22.9 22.9 22.6 58.2 58.2 57.9 57.9 57.6 148.2 148.2 147.9 147.9 147.6 147.2 9.2 9.2 10.3 10.3 12.0 12.0 65.265.2 58.358.3 50.0 50.0 217217 194194 166 166 178178 159159 136 136 152 152 136 136 116 116 7.6 22.6 57.6 13.6 13.6 15.4 15.4 17.0 17.0 19.9 19.9 24.4 24.4 29.2 29.2 32.4 32.4 45.4 45.4 48.4 48.4 58.1 58.1 64.5 64.5 77.4 77.4 80.0 80.0 96.8 96.8 113 44.1 44.1 39.0 39.0 35.3 35.3 30.2 30.224.0 24.020.5 20.5 18.5 18.513.2 13.212.4 12.4 10.3 10.3 9.3 9.3 7.7 7.7 7.1 7.1 5.6 5.6 5.3 147 147 130 130 118 118 101 10180.0 80.068.2 68.2 61.3 61.343.9 43.941.3 41.3 34.3 34.331.0 31.025.6 25.6 23.6 23.620.6 20.617.6 120 120 107 107 96.7 96.7 82.8 82.8 65.6 65.6 55.9 55.9 50.2 50.2 35.9 35.9 33.9 33.9 28.1 25.4 28.1 25.20.9 4 20.9 19.3 19.16.9 3 16.14.4 9 103 103 91.0 91.0 82.6 82.6 77.7 77.7 56.0 56.0 47.7 47.7 42.9 42.9 30.7 30.7 28.9 28.9 24.0 21.7 24.0 2117.9 .7 17.9 16.5 1614.4 .5 1412.3 .4 7.2 7.2 7.0 7.0 6.6 6.6 6.0 6.0 5.2 5.2 4.0 4.0 3.5 3.5 0.9 0.9 0.3 0.3 0 0 22.2 22.2 21.9 21.9 21.6 21.6 21.0 21.0 20.1 20.1 19.2 19.2 18.5 18.5 15.9 15.9 15.3 15.3 13.4 12.1 13.4 9.5 12 .1 9.5 9.0 95.6 .0 52.4 .6 57.2 57.2 56.9 56.9 56.6 56.6 56.0 56.0 55.1 55.1 54.2 54.2 53.5 53.5 50.9 50.9 147.6 147.2 Microsemi TVS Part Numbers Microsemi TVs Part Numbers compliant RTCA/DO-160 compliant to to RTCA/DO-160E Standard StandardCapacitance Capacitance • •Axial AxialLead Lead P6KE6.8A-200A, CACA P6KE6.8A-200A, • •Surface Mount Surface Mount SMBJ(G)5.0A-170A, CA SMBJ5.0A-170A, CA Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. Graph 2 20 28 30 8 9 10 VC Peak Red Curves Curves** PeakSurge SurgeCurrents Currents for the Red ISISThreat on graph graph Threatfor forLevels Levels shown on Threat Levels Levels 1-4 Threat o OverOver limit 25 25 C oC limit VWM VWM Conversion to 6.4/69 µsµs IPIP Values Conversion to 6.4/69 Values Over limit2525oCoC Over limit 600 W TVS @10/1000 µs µs 600 W TVS @10/1000 5.3 4.7 17.615.6 14.12.8 4 1210.9 .3 2.4 80 113 126 90 146 4.1 13.6 11.2 9.52 80 126 4.7 15.6 12.8 10.9 100 162 3.7 12.3 10.1 8.61 90 146 4.1 13.6 11.2 9.52 100* Surge currents 162 3.7 12.3 10.1 8.61 are reduced by clamping voltage (see Eq.1). In the table above, the first three columns, VWM, VC, and IPP 600 W are taken from the data sheet while the subsequent 0 0 three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since * Surge currents are reduced by clamping voltage (see Eq.1). In the table above, the first three columns, VWM, VC, and IPP 600 W are taken from the data sheet while the subsequent 0 0 many TVS devices require derating for higher temperatures. three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since © 2006 Microsemi Corporation many TVS devices require derating for higher temperatures. www.Microsemi.com Rev 1: 11/2013 15 MicroNote is a trademark of Microsemi Corporation 15 MicroNote 132 Aircraft Lightning Protection Graph 3: RTCA/DO-160, Waveform 4, Levels 2 through 5, 1500 W TVS Series Points for Curves in Graph Data Points forCurves Curves Graph DataData Points for in in Graph 3 3 3 V 5 6 7 8 9 10 Graph 3 12 15 18 20 28 30 VWM V VC V 5 6 9.2 7 10.3 12.0 8 9 13.6 10 15.4 17.0 12 15 19.9 18 24.4 29.2 20 28 32.4 30 45.4 VC IPP 1500 W IPP 1500 W 10/1000 µs 10/1000 µs V A A 9.2 163 163 146 10.3 146 12.0 125 125 13.6 110 110 97.4 15.4 17.0 97.4 88.2 88.2 19.9 75.3 24.4 75.3 61.5 29.2 61.5 51.4 51.4 32.4 46.3 45.4 46.3 33.0 48.4 33.0 31.0 Peak SurgeCurrents Currentsfor forthe theRed RedCurves Curves** Peak Surge IS Threat Levelsshown shownon ongraph graph IS Threat forforLevels ThreatLevels Levels2-5 2-5 Threat o I 25 oC I 70 oC IP 100 oC C IP 25 oPC I 70 PoC I 100 6.4/69 µs P 6.4/69 µs P 6.4/69 µs 6.4/69 µs 6.4/69 µs 6.4/69 µs A A A A A A 543 445 380 543 486 445 398 380340 486 416 398 341 340291 416 341 291 366 300 256 366 324 300 266 256227 324 294 266 241 227206 294 241 206 251 206 176 251 205 206 168 176144 205 171 168 140 144120 171 140 120 154 126 108 110 90.2 154 126 10877.0 110 103 90.284.5 77.072.1 103 93.6 84.576.7 72.165.5 2 3 4 5 2 3 4 5 125V/10A 300V/60A 750V/150A 1600V/320A 125V/10A 300V/60A 750V/150A 1600V/320A A A A A A A A A 23.1 58.2 148.2 318.2 23.1 58.2 148.2 318.2 22.9 57.9 147.9 317.9 22.9 57.9 147.9 317.9 22.6 57.6 147.6 317.6 22.6 57.6 147.6 317.6 22.8 57.2 147.2 317.3 22.8 57.2 147.2 317.3 21.9 56.9 146.9 316.9 21.9 56.9 146.9 316.9 21.6 56.6 146.6 316.6 21.6 56.6 146.6 316.6 21.0 56.0 146.0 316.0 20.1 55.1 145.1 21.0 56.0 146.0 316.0 19.2 54.2 144.2 20.1 55.1 145.1 19.2 54.2 144.2 18.5 53.5 143.5 15.9 50.9 140.9 18.5 53.5 143.5 15.3 50.3 15.9 50.9 140.9 15.3 50.3 14.3 49.3 C oC OverOver limitlimit 25 o25 VWM Conversion to 6.4/69 IP Values Conversion to 6.4/69 µs Iµs P Values Over limit 25 oC o Over limit 25 C 1500 TVS @10/1000 1500 W TVSW@10/1000 µs µs Waveform RTCA/DO-160E using 1500 W Diodes Waveform 44 RTCA/DO-160E using 1500 W TVS TVS Diodes Waveform 4 RTCA/DO-160 using 1500 W TVS Diodes Microsemi MicrosemiTVs TVsPart PartNumbers Numbers compliant complianttotoRTCA/DO-160E RTCA/DO-160 Standard Capacitance Standard Capacitance • Axial Lead • Axial Lead 1.5KE6.8A-400A 1.5KE6.8A-400A, CA 1N5629A-1N5665A 1N5629A-1N5665A 1N5907, 1N5908 1N5907, 1N5908 1N6036A-1N6072A 1N6036A-1N6072A 1N6138A-1N6073A 1N6138A-1N6073A 1N6027A-1N60303A 1N6469-1N6476 1N6469-1N6476 1N8110-1N8146 • Surface Mount • Surface Mount SMCJ(G)5.0A-170A, CA SMCJ5.0A-170A, CA Low capacitance Capacitance Low AxialLead Lead •• Axial LC6.5-170A LC6.5-170A 31.0 28.1 LCE6.5-170A LCE6.5-170A 23.2 77.2 63.3 54.0 12.1 47.1 33 28.1 93.6 76.7 65.5 14.3 49.3 • Surface Mount 19.4 64.6 52.0 45.2 9.5 44.5 • Surface Mount 40 64.5 23.2 77.2 63.3 54.0 12.1 47.1 SMCJLCE6.5-170A SMCJ(G)LCE6.5-170A 48 77.4 19.4 64.6 52.0 45.2 9.5 44.5 50 80.0 18.2 60.6 49.6 42.4 9.0 44.0 60 96.8 15.5 51.6 42.3 36.1 5.6 40.6 Except for 1Nxxxx part numbers shown 50 80.0 18.2 60.6 49.6 42.4 9.0 44.0 70 113 13.3 44.2 36.2 30.9 2.4 37.4 that already have military qualifications, 60 96.8 15.5 51.6 42.3 36.1 5.6 40.6 80 113 126 34.8 add M prefix for source control or 70 13.3 11.4 44.2 38.0 36.231.2 30.926.6 2.4 0 37.4 90 146 10.3 34.7 28.1 24.0 30.8 MA, MX, or MXL for further upgrade 80 126 11.4 38.0 31.2 26.6 0 34.8 100 162 9.3 31.0 25.4 21.7 27.6 screening options on plastic devices as 90 146 10.3 34.7 28.1 24.0 30.8 described in Micronote 129. * Surge currents are reduced by clamping voltage (see Eq.1). In the table above, the first three columns, V , V , and I 1500 W are taken from the data sheet while the subsequent 100 162 9.3 31.0 25.4 21.7 27.6 WM C PP 0 0 three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since TVS are devices require higher (see temperatures. *16 Surgemany currents reduced by derating clampingforvoltage Eq.1). In the table above, the first three columns, VWM, VC, and IPP 1500 W are taken from the data sheet while the subsequent 0 0 TM three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNote 127. The 70 C and 100 C curves were added for simplifying selection since © 2006 Microsemi Corporation many TVS devices require derating for higher temperatures. 33 48.4 53.3 40 64.5 53.3 48 77.4 www.Microsemi.com Rev 1: 11/2013 16 Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning Protection Graph 4: RTCA/DO-160, Waveform 4, Levels 2 through 5, 3000 W TVS Series 4 Waveform 4 RTCA/DO-160E using 3,000 W TVS Waveform 4 RTCA/DO-160 using 3000 TVSDiodes Diodes Waveform 4 RTCA/DO-160E using 3,000 WW TVS Diodes Conversion to 6.4/69 IP Values W TVS @10/1000 µs Conversion to 6.4/69 µs IP µs Values 3000 W 3000 TVS @10/1000 µs VWM VWMV V V 5 6 7 8 9 10 12 15 18 33 40 48 V o o o VIC 3000 IW PP 3000 W IP 25 oCIP 25 CIP 70 oCIP 70 CIP 100 IoPC100 C PP 10/1000 µs6.4/69 µs 6.4/69 µs 6.4/69 µs µs 10/1000 µs 6.4/69 µs 6.4/696.4/69 µs V A A A A A A 5 9.2 6 10.3 7 9.2 326 10.3 291 12.0 326 291 250 8 913.6 1015.4 13.6 15.4 221 17.0 195 221 195 176 12 1519.9 1824.4 19.9 24.4 151 29.2 123 151 123 103 12.0 17.0 29.2 20 2832.4 3045.4 48.4 250 176 103 32.4 45.4 92.6 48.4 66.0 62.0 92.6 66.0 62.0 33 4053.3 4864.5 53.3 64.5 56.2 77.4 46.4 56.2 46.4 38.8 5077.4 60 82.4 70 82.4 38.8 96.8 36.4 113 36.4 31.0 26.6 1085 969 832 736 649 586 502 409 343 308 220 206 187 154 129 A 1085 969 832 736 649 586 502 409 343 308 220 206 187 154 129 889 794 682 603 532 480 412 335 281 252 180 169 153 126 105 A 889 794 682 603 532 480 412 335 281 252 180 169 153 126 105 759 759 678 678 582 582 515 515 454 454 410 410 351 351 286 286 240 240 215 215 154 154 144 144 130 130 107 107 90.3 2 2 3 3 4 4 5 5 125V/10A 300V/60A 750V/150A 1600V/320A 125V/10A 300V/60A 750V/150A 1600V/320A A A A A A A A A 23.2 23.2 22.9 22.9 22.6 22.6 22.8 22.8 21.9 21.9 21.6 21.6 21.0 21.0 20.1 20.1 19.2 19.2 18.5 18.5 15.9 15.9 15.3 15.3 14.3 14.3 12.1 12.1 9.5 58.1 58.1 57.9 57.9 57.6 57.6 57.2 57.256.9 56.956.6 56.6 56.0 56.055.1 55.154.2 54.2 53.5 53.550.3 50.350.3 50.3 49.3 49.347.1 47.144.5 148.2 148.2 147.9 147.9 147.6 147.6 147.2 147.2 146.9 146.9 146.6 146.6 146.0 146.0 145.1 145.1 144.1 144.1 143.5 140.9 143.5 140.3 140.9 140.3 139.3 137.1 139.3 138.5 137.1 318.1 318.1 317.9 317.9 317.6 317.6 317.3 317.3 317.0 317.0 316.6 316.6 316.0 316.0 315.1 315.1 314.1 314.1 313.5 310.9 313.5 310.3 310.9 310.3 MicrosemiTVS TVsPart PartNumbers Numbers Microsemi complianttotoRTCA/DO-160 RTCA/DO-160E compliant StandardCapacitance Capacitance Standard • Surface Mount • Surface Mount SMLJ(G)5.0A-170A, CA SMLJ5.0A-170A, CA Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. 120 103 88.6 www.Microsemi.com Rev 1: 11/2013 17 Over limit 25 oC 120 103 88.6 Over limit 25 oC 9.5 8.5 44.543.5 138.5 98.4 90.3 84.0 134.2 84.5 72.1 5.6 40.6 98.4 84.0 8.5 43.5 134.2 72.6 62.0 2.4 37.4 96.8 31.0 84.5 72.1 5.6 40.6 113 26.6 72.6 62.0 2.4 37.4 80 126 22.8 75.9 62.2 53.1 0 34.8 90 146 20.6 68.6 56.2 48.0 30.8 80 126 22.8 75.9 62.2 53.1 0 34.8 100 162 18.6 61.9 50.7 43.3 27.6 90 146 20.6 68.6 56.2 48.0 30.8 100 * Surge 162currents are 18reduced .6 61.9 voltage (see 50.7Eq.1). In the 43.table 3 27.6 VWM, VC, and IPP 3000 W are taken from the data sheet while the subsequent by clamping above, the first three columns, 0 0 three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since * Surge currents aredevices reduced by clamping (see Eq.1). In the table above, the first three columns, VWM, VC, and IPP 3000 W are taken from the data sheet while the subsequent many TVS require deratingvoltage for higher temperatures. 0 0 three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since © 2006 Microsemi Corporation many TVS devices require derating for higher temperatures. 50 60 70 MicroNote is a trademark of Microsemi Corporation Graph 4 20 28 30 C Surge Currents Curves PeakPeak Surge Currents for for thethe RedRed Curves * * IS Threat for Levels shown on graph IS Threat for Levels shown on graph Threat Levels Threat Levels 2-52-5 Over limit 25 oC Over limit 25 oC DataPoints Points for Curves in Graph Data Points for Curves in Graph Data for Curves in Graph 4 4 17 MicroNote 132 Aircraft Lightning Protection Graph 5: RTCA/DO-160, Waveform 4, Levels 3 through 5, 5000 W TVS Series W TVS @10/1000 50005000 W TVS @10/1000 µs µs VWM V 5 6 7 8 9 10 Graph 5 12 15 18 20 28 30 36 40 50 60 70 80 VWM V 5 6 7 8 9 10 12 15 18 20 28 30 36 40 50 60 70 80 90 100 110 VC V VC V 9.2 9.2 10.3 10.3 12.0 12.0 13.6 I 5000 W PP W IPP 5000 10/1000 µs 10/1000 µs A A 543 543 485 485 417 417 367 WaveformWaveform 4 RTCA/DO-160E RTCA/DO-160E using 5000 WW TVS Diodes Waveform 4 using 5000 TVS Diodes 4 RTCA/DO-160 using 5000 W TVS Diodes Conversion 6.4/69 Values Conversion to to 6.4/69 µsµsIPIPValues o o 1808 1808 1615 1615 1389 1482 1482 1316 1316 1138 I 25 C I 70 C IP 25P oC IP 70P oC 6.4/69 µs 6.4/69 µs 6.4/69 µs 6.4/69 µs A A A A 1389 1222 1138 1002 I 100 oC ** Peak Surge Surge Currents Currents for Peak for the theRed RedCurves Curves Threat for for Levels IISSThreat Levelsshown shownon ongraph graph Threat Levels Threat Levels3-5 3-5 P oC IP 100 6.4/69 µs 6.4/69 µs A A 3 300V/60A 300V/60A A A 3 4 4 750V/150A 750V/150A A 5 5 1600V/320A 1600V/320A A 1266 1266 1124 1124 972 58.2 58.2 57.9 57.9 57.6 148.2 148.2 147.9 147.9 147.6 318.2 318.2 317.9 317.9 317.6 57.2 147.2 147.2 146.9 146.9 146.6 317.3 317.3 317.0 317.0 316.6 56.0 55.1 56.0 54.2 55.1 146.0 145.1 146.0 144.2 145.1 972 57.6 855 13.6 15.4 15.4 17.0 17.0 367 325 325 294 294 1222 1082 1082979 979 1002 889 889 803 803 855 757 757 685 685 57.2 56.9 56.9 56.6 56.6 29.2 172 19.9 19.9 24.4 24.4 29.2 251 251 206 206 172 835 835686 686572 684 562 684 469 562 584 480 584 400 480 572 469 400 54.2 32.4 45.4 45.4 48.4 48.4 58.1 154 110 110 103 103 86 512366 366342 342286 300 420 280 300 280 234 256 358 239 256 239 200 50.9 53.5 50.3 50.9 50.3 48.3 64.5 58.1 80.0 78 86 60 260 286 200 213 234 164 182 200 140 47.1 48.3 44.0 32.4 64.5 80.0 96.8 113 96.8 126 113 126 146 162 154 78 60 52 44 52 40 44 40 113 31 512 260 200173 146 173133 146 133 34 103 420 213 142 164 119 142 109 119 92.7 109 84.5 358 53.5 182 121 140 47.1 40.6 44.0 102 37.4 121 93.1 102 79.1 93.1 40.6 34.8 37.4 30.8 34.8 72.1 27.6 A 147.6 146.6 144.2 A 317.6 316.6 316.0 315.1 316.0 314.0 315.1 313.5 310.9 313.5 310.3 310.9 140.3 138.4 137.1 138.4 134 310.3 308.3 307.1 308.3 304.0 127 131 124 127 121 124 118 121 115 Standard Capacitance Standard Capacitance • Axial Lead • 5KP5.0A Axial Lead - 110, CA 5KP5.0A - 110, CA • Surface Mount PLAD5KP5.0A - 110A, CA Add M prefix for the part numbers (In development) shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. 314.0 143.5 140.9 143.5 140.3 140.9 137.1 131 134 Microsemi TVsTVS PartPart Numbers Microsemi Numbers compliant to RTCA/DO-160E compliant to RTCA/DO-160 307.1 304.0 o Over limit Over limit 25 oC 25 C Data Points for Curves in Graph Data Points for Curves Graph Data Points for Curves in in Graph 5 55 90 146 177 113 28 3493.2 92.7 79.1 30.8 76.4 65.2 24.6 100 162 31 103 84.5 72.1 27.6 118 are reduced voltage (see 76.4 Eq.1). In the table VWM,115 VC, and IPP 5000 W are taken from the data sheet while the subsequent 110* Surge currents 177 28 by clamping93.2 65.2above, the first three 24.6 columns, 0 0 TM three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNote 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices requirebyderating for voltage higher temperatures. * Surge currents are reduced clamping (see Eq.1). In the table above, the first three columns, VWM, VC, and IPP 5000 W are taken from the data sheet while the subsequent 0 0 18 three columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since © 2006 Microsemi Corporation many TVS devices require derating for higher temperatures. www.Microsemi.com Rev 1: 11/2013 18 Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning Protection Graph 6: RTCA/DO-160, Waveform 4, Levels 3 through 5, 6500 W TVS Series Waveform 4 RTCA/DO-160E using 6500 W TVS Diodes Data Points for Curves in Graph 6 6500 W TVS @10/1000 µs VWM VC Waveform 4 RTCA/DO-160 using 6500 W TVS Diodes Conversion to 6.4/69 µs IP Values Peak Surge Currents for the Red Curves* IS Threat for Levels shown on graph Threat Levels 3-5 IP 25 oC 6.4/69 µs A IP 70 oC 6.4/69 µs A IP 100 oC 6.4/69 µs A 3 300V/60A A 4 750V/150A A 5 1600V/320A A V 10 11 12 17.0 18.2 19.9 383 358 327 1275 1192 1089 1045 977 893 892 834 762 56.6 56.4 56.0 146.6 146.4 146.0 316.6 316.4 316.0 13 14 15 21.5 23.2 24.4 302 280 267 1006 932 889 825 764 729 704 652 622 55.7 55.4 55.1 145.7 145.4 145.1 315.7 315.4 315.1 16 17 18 26.0 27.6 29.2 250 236 223 833 786 743 683 645 609 583 550 520 54.8 54.5 54.2 144.8 144.5 144.2 314.8 314.5 314.0 20 22 24 32.4 35.5 38.9 202 183 167 673 609 556 552 499 456 471 426 389 53.5 52.9 52.2 143.5 142.9 142.2 313.5 312.9 312.2 26 28 30 42.1 45.5 48.4 154 143 135 513 476 450 421 390 369 359 333 315 51.6 50.9 50.3 141.6 140.9 140.3 311.6 310.9 310.3 33 36 40 53.3 58.1 64.5 123 111 101 410 370 336 336 303 276 287 259 235 49.3 48.3 47.1 139.3 138.4 137.1 309.3 308.3 307.1 43 45 48 69.4 72.7 77.4 93 89 85 310 296 283 254 243 232 217 207 198 46.1 45.5 44.5 136.1 135.5 134.5 Over Limit 25°C Standard Capacitance • Surface Mount PLAD6.5KP10A – 48A, CA 306.1 * Surge currents are reduced by clamping voltage (see Eq 1). In the table above, the first three column (VWM, VC, and IPP) are taken from the data sheet while the subsequent three 0 0 columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. www.Microsemi.com Data Points Rev 1: 11/2013 19 for Curves in Graph 6 MicroNote is a trademark of Microsemi Corporation Graph 6 V IPP 6500 W 10/1000 µs A Microsemi TVS Part Numbers compliant to RTCA/DO-160 MicroNote 132 Aircraft Lightning Protection Graph 7: RTCA/DO-160, Waveform 4, Levels 3 through 5, 7500 W TVS Series Waveform 4 RTCA/DO-160E using 7500 W TVS Diodes Data Points for Curves in Graph 7 7500 W TVS @10/1000 µs Graph 7 VWM VC Waveform 4 RTCA/DO-160 using 7500 W TVS Diodes Conversion to 6.4/69 µs IP Values Peak Surge Currents for the Red Curves* IS Threat for Levels shown on graph Threat Levels 3-5 IP 25 oC 6.4/69 µs A IP 70 oC 6.4/69 µs A IP 100 oC 6.4/69 µs A 3 300V/60A A 4 750V/150A A 5 1600V/320A A V V IPP 7500 W 10/1000 µs A 10 11 12 17.0 18.2 19.9 441 412 377 1469 1372 1255 1205 1125 1029 1028 960 878 56.6 56.4 56.0 146.6 146.4 146.0 316.6 316.4 316.0 13 14 15 21.5 23.2 24.4 349 323 307 1162 1076 1022 953 882 838 813 753 715 55.7 55.4 55.1 145.7 145.4 145.1 315.7 315.4 315.1 16 17 18 26.0 27.6 29.2 288 272 257 959 906 856 786 743 702 671 634 599 54.8 54.5 54.2 144.8 144.5 144.2 314.8 314.5 314.0 20 22 24 32.4 35.5 38.9 231 211 193 769 703 643 631 576 527 538 492 450 53.5 52.9 52.2 143.5 142.9 142.2 313.5 312.9 312.2 26 28 30 42.1 45.5 48.4 178 165 155 593 549 516 486 450 423 415 384 361 51.6 50.9 50.3 141.6 140.9 140.3 311.6 310.9 310.3 33 36 40 53.3 58.1 64.5 141 129 116 470 430 386 385 353 317 329 301 270 49.3 48.3 47.1 139.3 138.4 137.1 309.3 308.3 307.1 43 45 48 69.4 72.7 77.4 108 103 97 360 343 323 295 281 265 252 240 226 46.1 45.5 44.5 136.1 135.5 134.5 306.1 305.5 304.5 Microsemi TVS Part Numbers compliant to RTCA/DO-160 Standard Capacitance • Surface Mount PLAD7.5KP10A – 48A, CA * Surge currents are reduced by clamping voltage (see Eq 1). In the table above, the first three column (VWM, VC, and IPP) are taken from the data sheet while the subsequent three 0 0 columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. www.Microsemi.com Data Rev 1: 11/2013 Points for20Curves in Graph 7 Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning Protection Graph 8: RTCA/DO-160, Waveform 4, Levels 4 through 5, 15,000 W TVS Series Waveform 4 RTCA/DO-160 using 15,000 W TVS Diodes Data Points for Curves in Graph 8 Waveform 4 RTCA/DO-160 using 15,000 W TVS Diodes Peak Surge Currents for the Red Curves* IS Threat for Levels shown on graph Threat Levels 4-5 Conversion to 6.4/69 µs IP Values VWM V IPP 15,500 W 10/1000 µs A IP 25 oC 6.4/69 µs A IP 70 oC 6.4/69 µs A IP 100 oC 6.4/69 µs A 4 750V/150A A 5 1600V/320A A 7.0 9.0 10 12.0 15.4 17.0 1251 975 882 4166 3247 2937 3416 2663 2408 2916 2273 2056 148 147 147 318 317 317 12 14 16 19.9 23.2 26.0 753 645 576 2507 2148 1918 2055 1761 1573 1755 1504 1343 146 145 145 316 315 315 18 22 26 29.2 35.5 42.1 516 423 357 1718 1409 1189 1409 1155 975 1207 986 823 144 143 142 314 313 312 30 36 43 48.4 58.1 69.4 309 258 216 1029 859 719 844 704 590 720 601 503 140 138 136 310 308 306 48 54 60 77.4 87.1 96.8 195 171 156 649 569 519 532 467 426 454 398 363 135 133 131 305 303 301 70 90 130 113 146 209 132 102 71 440 340 236 361 279 194 308 238 165 127 121 108 297 291 160 200 280 259 322 452 58 47 33 193 157 110 158 129 90.0 135 110 77.0 98.2 85.6 59.6 V VC Microsemi TVS Part Numbers compliant to RTCA/DO-160 Standard Capacitance • Axial Lead 15KP22A – 280A, CA • Surface Mount PLAD15KP7.0A – 200A, CA Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. Over Limit 25°C * Surge currents are reduced by clamping voltage (see Eq 1). In the table above, the first three column (VWM, VC, and IPP) are taken from the data sheet while the subsequent three 0 0 columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. www.Microsemi.com Data Points Rev 1: 11/2013 21 for Curves in Graph 8 MicroNote is a trademark of Microsemi Corporation Graph 8 15,000 W TVS @10/1000 µs MicroNote 132 Aircraft Lightning Protection Graph 9: RTCA/DO-160, Waveform 4, Levels 4 through 5, 30,000 W TVS Series Waveform 4 RTCA/DO-160 Data Points for Curves in Graph 9 Waveform 4 RTCA/DO-160 using 30,000 W TVS Diodes Peak Surge Currents for the Red Curves* IS Threat for Levels shown on graph Threat Levels 4-5 30,000 W TVS @10/1000 µs Conversion to 6.4/69 µs IP Values VWM IP 25 oC 6.4/69 µs A IP 70 oC 6.4/69 µs A IP 100 oC 6.4/69 µs A 4 750V/150A A 5 1600V/320A A V IPP 30,000 W 10/1000 µs A 14 16 18 24.0 27.2 30.8 1251 1101 975 4166 3666 3247 3416 3006 2663 2916 2566 2273 145.2 144.6 143.8 315.2 314.6 313.8 22 26 30 36.4 43.0 48.8 822 696 618 2737 2318 2058 2244 1901 1688 1916 1623 1441 142.7 141.4 140.2 312.7 311.4 310.2 36 43 48 58.1 69.4 77.4 516 432 390 1718 1439 1299 1409 1180 1065 1203 1007 909 138.3 136.1 134.5 308.4 306.1 304.5 54 60 70 87.1 96.8 113 342 312 264 1139 1039 879 934 852 721 797 727 615 132.6 130.6 127.4 302.6 300.6 297.4 78 90 110 126 146 177 240 204 168 799 679 559 655 557 458 559 475 391 124.8 120.8 114.6 294.8 290.8 284.6 130 160 180 209 259 291 142 116 104 473 386 346 388 317 284 331 270 242 108.2 98.2 91.8 278.2 268.2 261.8 220 300 400 356 483 644 84 62 46 280 206 153 230 169 125 196 144 107 78.8 53.4 21.2 248.8 Over Limit 25°C V Graph 9 using 30,000 W TVS Diodes VC Microsemi TVS Part Numbers compliant to RTCA/DO-160 Standard Capacitance • Surface Mount PLAD30KP14A – 400A, CA Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. * Surge currents are reduced by clamping voltage (see Eq 1). In the table above, the first three column (VWM, VC, and IPP) are taken from the data sheet while the subsequent three 0 0 columns of 6.4/69 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. www.Microsemi.com MicroNote is a trademark of Microsemi Corporation Data Points for22Curves in Graph 9 Rev 1: 11/2013 MicroNote 132 Aircraft Lightning Protection Graph 10: RTCA/DO-160, Waveform 5A, Levels 1 through 2, 500 W TVS Series Data Points for Curves in in Graph 10108 Data Points for Curves Graph Data Points for Curves in Graph 500500 WW TVS @10/1000 µs µs TVS @10/1000 oC o oC o oC o IP 25 IP 25 C IP 70 IP 70 C IP 100 IP 100 C 40/120 µs µs 40/120 µs µs 40/120 µs µs 40/120 40/120 40/120 A A A A A A Peak Surge Currents for for thethe RedRed Curves * * Peak Surge Currents Curves IS Threat for for Levels shown on graph IS Threat Levels shown on graph Threat Levels 1-21-2 Threat Levels 1 1 2 2 50V/50A 50V/50A125V/125A 125V/125A A A A A V V 5 5 6 6 7 7 9.29.2 10.3 10.3 12.0 12.0 54.3 54.3 48.5 48.5 41.7 41.7 126126 113113 97.2 97.2 103103 92.7 92.7 79.7 79.7 88.2 88.2 79.1 79.1 68.3 68.3 40.8 40.8 39.7 39.7 38.0 38.0 116116 114114 113113 8 8 9 9 10 10 13.6 13.6 15.4 15.4 17.0 17.0 36.7 36.7 32.5 32.5 29.4 29.4 85.5 85.5 75.7 75.7 68.5 68.5 70.1 70.1 62.1 62.1 56.1 56.1 59.8 59.8 53.0 53.0 47.9 47.9 36.4 36.4 34.6 34.6 33.0 33.0 112112 110110 108108 12 12 15 15 18 18 19.9 19.9 24.4 24.4 29.2 29.2 25.1 25.1 20.6 20.6 17.2 17.2 58.5 58.5 48.0 48.0 40.1 40.1 48.0 48.0 39.3 39.3 32.9 32.9 41.0 41.0 33.6 33.6 28.1 28.1 30.1 30.1 25.6 25.6 20.8 20.8 105105 101101 96.8 96.8 20 20 28 28 30 30 32.4 32.4 45.4 45.4 48.4 48.4 15.4 15.4 11.0 11.0 10.3 10.3 35.9 35.9 25.6 25.6 24.0 24.0 29.4 29.4 21.0 21.0 19.7 19.7 25.1 25.1 17.9 17.9 16.8 16.8 17.1 17.1 4.64.6 1.61.6 91.6 91.6 79.0 79.0 76.6 76.6 36 36 40 40 48 48 53.3 53.3 64.5 64.5 77.4 77.4 8.68.6 7.87.8 6.56.5 20.0 20.0 18.1 18.1 15.1 15.1 16.4 16.4 14.8 14.8 12.4 12.4 14.0 14.0 12.7 12.7 10.6 10.6 71.7 71.7 60.5 60.5 47.6 47.6 50 50 60 60 70 70 82.4 82.4 96.8 96.8 113113 6.06.0 5.25.2 4.44.4 14.0 14.0 12.1 12.1 10.2 10.2 11.5 11.5 9.99.9 8.48.4 9.89.8 8.48.4 7.17.1 42.6 42.6 28.2 28.2 12.0 12.0 80 80 90 90 100100 126126 146146 162162 4.04.0 3.43.4 3.13.1 9.39.3 7.97.9 7.27.2 7.67.6 6.56.5 5.95.9 6.56.5 5.55.5 5.05.0 Devices Devices > 78 >V 78WM VWM within limits within limits Microsemi TVSTVs PartPart Numbers Microsemi Numbers compliant to RTCA/DO-160 compliant to RTCA/DO-160E Standard Capacitance Standard Capacitance • Axial Lead • Axial Lead P5KE5.0A-170A, CA CA P5KE5.0A-170A, 1N6103A-1N6137A 1N6103A-6137A 1N6461-1N6468 1N6461-6468 1N8073-1N8109 • Surface Mount SMAJ5.0A-170A, CA Low Capacitance Low capacitance • Axial Lead SAC5.0-50 • Axial Lead SAC5.0-50 • Surface Mount SMBJSAC5.0-50 • Surface Mount HSMBJSAC5.0-50 Except for 1Nxxxx part numbers shown that already have military qualifications, add M prefix for source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. * Surge currents areare reduced by by clamping voltage (see Eq.1). In the table above, thethe firstfirst three columns, VWMV, VC,,Vand IPP I500500 W are taken from the the datadata sheet while the the subsequent * Surge currents reduced clamping voltage (see Eq.1). In the table above, three columns, W are taken from sheet while subsequent 0 0 WM C, and PP TM 0 0 three columns of 40/120 µs µs data were derived as as illustrated earlier in this document andand alsoalso MicroNote TheThe 70 70 C and 100100 C curves were added for simplifying selection since TM three columns of 40/120 data were derived illustrated earlier in this document MicroNote127. 127. C and C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. many TVS devices require derating for higher temperatures. www.Microsemi.com © 2006 Microsemi 23 Corporation Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation Graph 10 V V IPP I500500 W W PP 10/1000 µs µs 10/1000 A A WM VC V C Conversion to 40/120 µs µs IP Values Conversion to 40/120 IP Values Over limit 25 oC Over limit 25 oC VWM V Waveform 5A RTCA/DO-160 using 500 W TVS Diodes Waveform 5A using 500 WW TVS Diodes Waveform 5ARTCA/DO-160E RTCA/DO-160E using 500 TVS Diodes 21 MicroNote 132 Aircraft Lightning Protection Graph 11: RTCA/DO-160, Waveform 5A, Levels 1 through 2, 600 W TVS Series 600W WTVS TVS @10/1000 @10/1000 µs µs 600 Graph 11 WM VVWM 22 VVCC V V V V 5 5 6 6 7 7 8 89 9 10 10 12 12 15 15 18 18 20 20 28 28 30 30 36 40 36 48 40 48 50 60 50 70 60 9.2 9.2 10.3 10.3 12.0 12.0 13.6 13.6 15.4 15.4 17.0 17.0 19.9 19.9 24.4 24.4 29.2 29.2 32.4 32.4 45.4 45.4 48.4 48.4 58.1 64.5 58.1 77.4 64.5 77.4 82.4 96.8 82.4 113 96.8 600 W PP 600 IIPP W 10/1000 µs 10/1000 µs A A 62.2 62.2 58.3 58.3 50.0 50.0 44.1 44.1 39.0 39.0 35.3 35.3 30.2 30.2 24.0 24.0 20.5 20.5 18.5 18.5 13.2 13.2 12.4 12.4 10.3 9.3 10.3 7.7 9.3 7.7 7.1 6.2 7.1 5.3 6.2 70 80 90 80 100 90 113 126 146 126 162 146 5.3 4.7 4.1 4.7 3.7 4.1 Waveform 5A RTCA/DO-160 usingW600 W TVS Diodes Waveform 5A RTCA/DO-160E using 600 TVS Diodes Conversion Conversiontoto40/120 40/120µsµsIPIPValues Values IP 25 ooC IP 25 C 40/120 µs 40/120 µs A A IP 70 ooC IP 70 C 40/120 µs 40/120 µs A A IP 100 oCo IP 100 C 40/120 µs 40/120 µs A A 151 151 136 136 116 116 103 103 90.8 90.8 82.2 82.2 70.4 70.4 55.9 55.9 47.8 47.8 43.1 43.1 30.7 30.7 28.9 28.9 24.0 21.7 24.0 17.9 21.7 17.9 16.5 14.4 16.5 12.3 14.4 124 124 112 112 95.1 95.1 84.5 84.5 74.4 74.4 67.4 67.4 57.7 57.7 45.8 45.8 39.2 39.2 35.3 35.3 25.2 25.2 23.7 23.7 19.7 17.8 19.7 14.7 17.8 14.7 13.5 11.8 13.5 10.1 11.8 106 106 95.2 95.2 81.2 81.2 72.1 72.1 63.6 63.6 57.5 57.5 49.3 49.3 39.1 39.1 33.4 33.4 30.2 30.2 21.5 21.5 20.2 20.2 16.8 15.2 16.8 12.5 15.2 12.5 11.6 10.1 11.6 8.6 10.1 12.3 10.9 9.6 10.9 8.6 9.6 10.1 8.9 7.9 8.9 7.0 7.9 8.6 7.6 6.7 7.6 6.0 6.7 * * Peak Surge Currents forfor thethe RedRed Curves Peak Surge Currents Curves IS Threat forfor Levels shown on graph IS Threat Levels shown on graph Threat Levels 1-21-2 Threat Levels 1 2 1 2 50V/50A 125V/125A 50V/50A 125V/125A A A A A 40.8 40.8 39.7 39.7 38.0 38.0 36.4 36.4 34.6 34.6 33.0 33.0 30.1 30.1 25.6 25.6 20.8 20.8 17.1 17.1 4.6 1.64.6 1.6 116 116 114 114 113 113 111 109111 108109 108 105 101105 95.8101 95.8 92.6 92.6 79.6 79.6 76.6 76.6 66.9 60.5 66.9 47.6 60.5 47.6 42.6 28.2 42.6 12.0 28.2 Over limit 25 oC Over limit 25 oC DataPoints Pointsfor forCurves Curves Graph Data ininGraph 119 Microsemi TVs Part Numbers Microsemi TVS Part Numbers compliant to RTCA/DO-160E compliant to RTCA/DO-160 Standard Capacitance Standard Capacitance • Axial Lead • Axial Lead P6KE6.8A-200A, CA P6KE6.8A-200A, CA • Surface Mount • Surface Mount SMBJ(G)5.0A-170A, CA SMBJ5.0A-170A, CA Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. 12.0 Devices > 75 VWM withinDevices limits > 75 VWM within limits 162are reduced 3.7 8.6 (see Eq.1). 7.0In the table 6.0 * 100 Surge currents by clamping voltage above, the first three columns, VWM, VC, and IPP 600 W are taken from the data sheet while the subsequent 0 0 three columns of 40/120 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since * many SurgeTVS currents are reduced by clamping voltage (see Eq.1). In the table above, the first three columns, VWM, VC, and IPP 600 W are taken from the data sheet while the subsequent devices require derating for higher temperatures. 0 0 TM three columns of 40/120 µs data were derived as illustrated earlier in this document and also MicroNote 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. © 2006 Microsemi Corporation www.Microsemi.com Rev 1: 11/2013 24 MicroNote is a trademark of Microsemi Corporation MicroNote 132 Aircraft Lightning Protection Graph 12: RTCA/DO-160, Waveform 5A, Levels 1 through 3, 1500 W TVS Series Data Pointsfor forCurves Curves Graph Data inin Graph 1210 DataPoints Points for Curves in Graph 10 Conversion Conversiontoto40/120 40/120µsµsIPIPValues Values Peak ** PeakSurge SurgeCurrents Currentsfor forthe theRed RedCurves Curves ISIThreat for Levels shown on graph Threat for Levels shown on graph S Threat ThreatLevels Levels1-3 1-3 IPI7070oCoC P 40/120 40/120µsµs AA oCo IPI100 P 100 C 40/120 40/120µsµs AA 11 50V/50A 50V/50A AA 22 125V/125A 125V/125A AA 33 300/300 300/300 AA 55 66 77 9.2 9.2 10.3 10.3 12.0 12.0 163 163 146 146 125 125 380 380 340 340 291 291 312 312 279 279 239 239 266 266 238 238 203 203 40.8 40.8 39.7 39.7 38.0 38.0 116 116 114 114 113 113 291 291 290 290 288 288 88 99 1010 13.6 13.6 15.4 15.4 17.0 17.0 110 110 97.4 97.4 88.2 88.2 256 256 227 227 206 206 210 210 186 186 169 169 179 179 159 159 144 144 36.4 36.4 34.6 34.6 33.0 33.0 111 111 110 110 108 108 1212 1515 1818 19.9 19.9 24.4 24.4 29.2 29.2 75.3 75.3 61.5 61.5 51.4 51.4 175 175 143 143 120 120 144 144 117 117 98.4 98.4 122 122 100 100 84.0 84.0 30.1 30.1 25.6 25.6 20.8 20.8 105 105 101 101 95.8 95.8 2020 2828 3030 32.4 32.4 45.4 45.4 48.4 48.4 46.3 46.3 33.0 33.0 31.0 31.0 108 108 76.9 76.9 72.2 72.2 88.6 88.6 63.0 63.0 59.2 59.2 75.6 75.6 53.8 53.8 50.5 50.5 17.1 17.1 4.6 4.6 1.6 1.6 92.6 92.6 79.6 79.6 76.6 76.6 3636 4040 4848 58.1 58.1 64.5 64.5 77.4 77.4 28.1 28.1 23.2 23.2 19.4 19.4 65.5 65.5 54.0 54.0 45.2 45.2 53.7 53.7 44.3 44.3 37.1 37.1 45.8 45.8 37.8 37.8 31.6 31.6 66.9 66.9 60.5 60.5 47.6 47.6 5050 6060 7070 82.4 82.4 96.8 96.8 113 113 18.2 18.2 15.5 15.5 13.3 13.3 42.4 42.4 36.1 36.1 31.0 31.0 34.8 34.8 29.6 29.6 25.4 25.4 29.7 29.7 25.2 25.2 21.7 21.7 8080 9090 100 100 126 126 146 146 162 162 11.4 11.4 10.3 10.3 9.3 9.3 26.6 26.6 24.0 24.0 21.7 21.7 21.8 21.8 19.7 19.7 17.8 17.8 18.6 18.6 16.8 16.8 15.2 15.2 42.6 42.6 28.2 28.2 12.0 12.0 Devices Devices >60 >60VWM VWM within withinlimits limits VCV VV WM C Over limit 25 oC Over limit 25 oC IPI2525oCoC P 40/120 40/120µsµs AA VWM V 286 Microsemi MicrosemiTVS TVsPart PartNumbers Numbers compliant complianttotoRTCA/DO-160 RTCA/DO-160E Standard StandardCapacitance Capacitance • •Axial AxialLead Lead 1.5KE6.8A-400A, 1.5KE6.8A-400ACA 1N5629A-1N5665A 1N5629A-1N5665A 1N5907, 1N5907,1N5908 1N5908 1N6036A-1N6072A 1N6036A-1N6072A 1N6138A-1N6173A 1N6138A-1N6073A 1N6469-1N6476 1N6027A-1N60303A 1N8110-1N8146 1N6469-1N6476 • •Surface SurfaceMount Mount SMCJ5.0A-170A, CA CA SMCJ(G)5.0A-170A, Low capacitance Low• capacitance Axial Lead LC6.5-170A • Axial Lead LCE6.5-170A LC6.5-170A LCE6.5-170A • Surface Mount SMCJLCE6.5-170A • Surface Mount SMCJ(G)LCE6.5-170A Except for 1Nxxxx part numbers shown that already have military qualifications, add M prefix for source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. * *Surge , VV, and IPPI 1500 W are WM Surgecurrents currentsare arereduced reducedbybyclamping clampingvoltage voltage(see (seeEq.1). Eq.1).InInthe thetable tableabove, above,the thefirst firstthree threecolumns, columns,VV aretaken takenfrom fromthe thedata datasheet sheetwhile whilethe thesubsequent subsequent WM, C C, and PP 1500 W 0 0 TM 0 0 three threecolumns columnsofof40/120 40/120µsµsdata datawere werederived derivedasasillustrated illustratedearlier earlierininthis thisdocument documentand andalso alsoMicroNote MicroNoteTM127. 127.The The7070CCand and100 100CCcurves curveswere wereadded addedforforsimplifying simplifyingselection selectionsince since many TVS devices require derating for higher temperatures. many TVS devices require derating for higher temperatures. www.Microsemi.com © 2006 Microsemi Corporation 25 Rev 1: 11/2013 Graph 12 VV IPPI 1500 W PP 1500 W 10/1000 10/1000µsµs AA Over limit 25 oC Over limit 25 oC 1500 1500WWTVS TVS@10/1000 @10/1000µsµs WaveformWaveform 5A RTCA/DO-160E using 1500 WW TVS Diodes 5A RTCA/DO-160 using 1500 TVS Diodes Waveform 5A RTCA/DO-160E using 1500 W TVS Diodes MicroNote is a trademark of Microsemi Corporation 23 MicroNote 132 Aircraft Lightning Protection Graph 13: RTCA/DO-160, Waveform 5A, Levels 1 through 3, 3000 W TVS Series Data Points for Curves Graph Data Points for Curves in Graph 13 Data Points for Curves in in Graph 11 13 2424 Conversion to 40/120 IP Values Conversion to 40/120 µs Iµs P Values o o oC oC IP 100 IP 25IPo25 C C IP 70IPo70 C C IP 100 40/120 40/120 40/120 40/120 µs µs 40/120 µs µs 40/120 µs µs A A A A A A Peak Surge Currents Curves * * Peak Surge Currents for for thethe RedRed Curves IS Threat for Levels shown on graph IS Threat for Levels shown on graph Threat Levels Threat Levels 1-31-3 VWMVWM VC VC V V V V IPP 3000 IPP 3000 W W 10/1000 10/1000 µs µs A A 2 2 3 3 125V/125A300V/300A 300V/300A 125V/125A A A A A 5 5 6 6 7 7 9.2 9.2 10.310.3 12.012.0 326326 291291 250250 759759 678678 582582 622622 556556 477477 531531 475475 408408 40.840.8 39.739.7 38.038.0 116116 114114 113113 290.8 290.8 289.7 289.7 288288 8 8 9 9 10 10 13.613.6 15.415.4 17.017.0 221221 195195 176176 515515 454454 410410 422422 372372 336336 361361 318318 287287 36.436.4 34.634.6 33.033.0 111 111 110110 108108 286.4 286.4 285285 283283 12 12 15 15 18 18 19.919.9 24.424.4 29.229.2 151151 123123 103103 352352 287287 240240 289289 235235 197197 246246 201201 168168 30.130.1 25.625.6 20.820.8 105105 101101 95.895.8 280280 275275 270 20 20 28 28 30 30 32.432.4 45.445.4 48.448.4 92.692.6 66.066.0 62.062.0 216216 154154 144144 177177 126126 118118 151151 108108 101101 17.117.1 4.6 4.6 1.6 1.6 92.692.6 79.679.6 76.676.6 267 36 36 40 40 48 48 58.158.1 64.564.5 77.477.4 51.651.6 46.446.4 38.838.8 120120 108108 90.490.4 98.498.4 88.688.6 74.174.1 84.084.0 75.675.6 63.363.3 0 0 66.966.9 60.560.5 47.647.6 50 50 60 60 70 70 82.482.4 96.896.8 113113 35.935.9 31.031.0 26.626.6 83.683.6 72.272.2 61.961.9 68.568.5 59.259.2 50.750.7 58.558.5 50.550.5 43.343.3 45.045.0 28.228.2 12.012.0 80 80 90 90 100100 126126 146146 162162 22.822.8 20.620.6 18.618.6 53.153.1 48.048.0 43.343.3 43.543.5 39.439.4 35.535.5 37.237.2 33.633.6 30.330.3 0 0 Microsemi Numbers Microsemi TVsTVS PartPart Numbers compliant to RTCA/DO-160 compliant to RTCA/DO-160E Standard Capacitance Standard Capacitance • Surface Mount • Surface Mount SMLJ5.0A-170A, CA CA SMLJ(G)5.0A-170A, Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. limit 25 oC 1 1 50V/50A 50V/50A A A Over limit Over 25 oC Graph 13 3000 W TVS @10/1000 3000 W TVS @10/1000 µs µs Waveform 5A RTCA/DO-160 using 3000 W TVS Diodes Waveform 5ARTCA/DO-160E RTCA/DO-160E using 3000 TVS Diodes Waveform 5A using 3000 WW TVS Diodes * Surge currents reduced by clamping voltage Eq.1). In the table above, three columns, IPP 3000 W are taken sheet while subsequent C, and * Surge currents are are reduced by clamping voltage (see(see Eq.1). In the table above, the the firstfirst three columns, VWMV, WM VC,, V and IPP 3000 W are taken fromfrom the the datadata sheet while the the subsequent 0 0 TM 0 0 TM three columns of 40/120 µs data were derived as illustrated earlier in this document MicroNote C and C curves were added for simplifying selection since three columns of 40/120 µs data were derived as illustrated earlier in this document andand alsoalso MicroNote 127.127. TheThe 70 70 C and 100100 C curves were added for simplifying selection since many devices require derating for higher temperatures. many TVSTVS devices require derating for higher temperatures. © 2006 Microsemi Corporation www.Microsemi.com © 2006 Microsemi Corporation 26 Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation MicroNote 132 Aircraft Lightning Protection Graph 14: RTCA/DO-160, Waveform 5A, Levels 2 through 4, 5000 W TVS Series VC VC V V 5 5 6 6 7 7 8 8 9 9 10 10 12 12 15 15 18 18 20 20 28 28 30 30 36 36 40 40 48 48 50 50 60 60 70 70 80 80 90 90 100 100 V V 9.2 9.2 10.3 10.3 12.0 12.0 13.6 13.6 15.4 15.4 17.0 17.0 19.9 19.9 24.4 24.4 29.2 29.2 32.4 32.4 45.4 45.4 48.4 48.4 58.1 58.1 64.5 64.5 77.4 77.4 82.4 82.4 96.8 96.8 113 113 126 126 146 146 162 162 I 5000 W IPPPP5000 W 10/1000 µs 10/1000 µs A A 543 543 485 485 417 417 367 367 325 325 294 294 251 251 206 206 172 172 154 154 110 110 103 103 86 86 78.0 78.0 65.0 65.0 60.0 60.0 47.0 47.0 44.0 44.0 49.0 49.0 34.0 34.0 31.0 31.0 IP 25 oC IP 25 oC 40/120 µs 40/120 µs A A 1265 1265 1130 1130 972 972 855 855 757 757 685 685 585 585 480 480 401 401 359 359 256 256 240 240 200 200 182 182 151 151 140 140 109 109 102 102 95.5 95.5 79.2 79.2 72.2 72.2 IP 70 oC IP 70 oC 40/120 µs 40/120 µs A A 1037 1037 927 927 797 797 701 701 621 621 562 562 480 480 394 394 329 329 294 294 210 210 197 197 164 164 149 149 124 124 115 115 89.4 89.4 83.6 83.6 78.3 78.3 64.9 64.9 59.2 59.2 IP 100 oC IP 100 oC 40/120 µs 40/120 µs A A 886 886 791 791 681 681 599 599 530 530 480 480 410 410 336 336 281 281 251 251 179 179 168 168 140 140 127 127 106 106 98.0 98.0 76.3 76.3 71.4 71.4 66.9 66.9 55.4 55.4 50.6 50.6 Peak Surge Currents for the Red Curves* Peak Surge Currents for the Red Curves* I Threat for Levels shown on graph IS SThreat for Levels shown on graph Threat Levels 2-4 Threat Levels 2-4 2 2 125V/125A 125V/125A A A 116 116 114 114 113 113 111 111 110 110 108 108 105 105 101 101 95.8 95.8 92.6 92.6 79.6 79.6 76.6 76.6 66.9 66.9 60.5 60.5 47.6 47.6 45.0 45.0 28.2 28.2 12.0 12.0 0 0 3 4 3 4 300V/300A 750V/750A 300V/300A 750V/750A A A A A 291 741 291 741 290 740 290 740 288 738 288 738 286 736 286 736 285 734 285 734 283 283 732 280 Over 280 275 limit 275 25 oC 270 270 267 267 254 254 251 Microsemi TVS Part Numbers Microsemi TVs Part Numbers compliant to RTCA/DO-160 compliant to RTCA/DO-160E Standard Capacitance Standard Capacitance • Axial Lead • Axial Lead 5KP5.0A - 110A, CA 5KP5.0A - 110A, CA • Surface Mount PLAD5KP5.0A - 110A, CA (In development) Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. Over limit 25 oC * Surge currents are reduced by clamping voltage (see Eq.1). In the table above, the first three columns, VWM, VC, and IPP 5000 W are taken from the data sheet while the subsequent * three Surgecolumns currentsofare reduced by clamping voltage Eq.1).earlier In the in table the and first three columns, VWM127. , VC,The and70 IPP0C 5000 are0Ctaken from theadded data sheet while the selection subsequent 40/120 µs data were derived as (see illustrated this above, document also MicroNoteTM andW 100 curves were for simplifying since 0 0 three of 40/120 µs data wereforderived illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since manycolumns TVS devices require derating higher as temperatures. many TVS devices require derating for higher temperatures. www.Microsemi.com © 2006 Microsemi 27 Corporation Rev 1: 11/2013 MicroNote is a trademark of Microsemi Corporation Graph 14 VWM VWM Conversion to 40/120 µs I Values Conversion to 40/120 µs IPPValues Over limit 25 oC 5000 W TVS @10/1000 µs 5000 W TVS @10/1000 µs Waveform 5A RTCA/DO-160E using 5000 W TVS Diodes 5A RTCA/DO-160 5000 TVS Diodes Waveform Waveform 5A RTCA/DO-160E usingusing 5000 WW TVS Diodes Over limit 25 oC Data Points Points forCurves Curves in Graph 14 Data 1412 Data Points for for CurvesininGraph Graph 25 MicroNote 132 Aircraft Lightning Protection Graph 15: RTCA/DO-160, Waveform 5A, Levels 2 through 4, 6500 W TVS Series Waveform 5A RTCA/DO-160E using 6500 W TVS Diodes Data Points for Curves in Graph 15 Graph 15 VWM VC Conversion to 40/120 µs IP Values Peak Surge Currents for the Red Curves* IS Threat for Levels shown on graph Threat Levels 2-4 IP 25 oC 6.4/69 µs A IP 70 oC 6.4/69 µs A IP 100 oC 6.4/69 µs A 2 125V/125A A 3 300V/300A A 4 750V/750A A V V IPP 6500 W 10/1000 µs A 10 11 12 17.0 18.2 19.9 383 358 327 892 834 762 731 684 625 624 584 533 108 107 105 283 282 280 733 732 730 13 14 15 21.5 23.2 24.4 302 280 267 704 652 622 577 535 510 493 456 435 103 102 101 278 277 276 16 17 18 26.0 27.6 29.2 250 236 223 582 550 520 477 451 426 407 385 364 99.0 97.4 95.8 274 272 271 Over Limit 25°C 6500 W TVS @10/1000 µs Waveform 5A RTCA/DO-160 using 6500 W TVS Diodes 20 22 24 32.4 35.5 38.9 202 183 167 471 426 389 386 349 319 330 298 272 92.6 89.5 86.1 268 264 261 26 28 30 42.1 45.5 48.4 154 143 135 359 333 315 294 273 258 251 233 220 82.9 79.5 76.6 258 254 252 33 36 40 53.3 58.1 64.5 123 111 101 287 259 235 235 212 193 201 181 164 71.7 66.9 60.5 247 242 43 45 48 69.4 72.7 77.4 93 89 85 217 207 198 178 170 162 152 145 139 55.6 52.3 47.6 Microsemi TVS Part Numbers compliant to RTCA/DO-160 Standard Capacitance • Surface Mount PLAD6.5KP10A – 48A, CA Over Limit 25°C * Surge currents are reduced by clamping voltage (see Eq 1). In the table above, the first three column (VWM, VC, and IPP) are taken from the data sheet while the subsequent three 0 0 columns of 40/120 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. www.Microsemi.com Data Rev 1: 11/2013 Points for 28 Curves in Graph 15 Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning Protection Graph 16: RTCA/DO-160, Waveform 5A, Levels 2 through 4, 7500 W TVS Series Waveform 5A RTCA/DO-160E using 7500 W TVS Diodes Data Points for Curves in Graph 16 7500 W TVS @10/1000 µs VC Conversion to 40/120 µs IP Values Peak Surge Currents for the Red Curves* IS Threat for Levels shown on graph Threat Levels 2-4 IP 25 oC 6.4/69 µs A IP 70 oC 6.4/69 µs A IP 100 oC 6.4/69 µs A 2 125V/125A A 3 300V/300A A 4 750V/750A A V V IPP 7500 W 10/1000 µs A 10 11 12 17.0 18.2 19.9 441 412 377 1028 960 878 843 787 720 720 672 615 108 107 105 283 282 280 733 732 730 13 14 15 21.5 23.2 24.4 349 323 307 813 753 715 667 617 586 569 527 500 103 102 101 278 277 276 728 727 16 17 18 26.0 27.6 29.2 288 272 257 671 634 599 550 520 491 470 444 419 99.0 97.4 95.8 274 272 271 20 22 24 32.4 35.5 38.9 231 211 193 538 492 450 441 403 369 377 344 315 92.6 89.5 86.1 268 264 261 26 28 30 42.1 45.5 48.4 178 165 155 415 384 361 340 315 296 290 269 253 82.9 79.5 76.6 258 254 252 33 36 40 53.3 58.1 64.5 141 129 116 329 301 270 270 247 221 230 211 189 71.7 66.9 60.5 247 242 236 43 45 48 69.4 72.7 77.4 108 103 97 252 240 226 207 197 185 176 168 158 55.6 52.3 47.6 231 227 223 Microsemi TVS Part Numbers compliant to RTCA/DO-160 Standard Capacitance • Surface Mount PLAD7.5KP10A – 48A, CA Over Limit 25°C VWM Waveform 5A RTCA/DO-160 using 7500 W TVS Diodes Graph 16 * Surge currents are reduced by clamping voltage (see Eq 1). In the table above, the first three column (VWM, VC, and IPP) are taken from the data sheet while the subsequent three 0 0 columns of 40/120 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. www.Microsemi.com Rev 1: 11/2013 Data Points 29 for Curves in Graph 16 Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning Protection Graph 17: RTCA/DO-160, Waveform 5A, Levels 2 through 4, 15,000 W TVS Series Waveform 5A RTCA/DO-160 using 15,000 W TVS Diodes Data Points for Curves in Graph 17 15,000 W TVS @10/1000 µs Conversion to 40/120 µs IP Values Peak Surge Currents for the Red Curves* IS Threat for Levels shown on graph Threat Levels 3-5 IP 70 oC 40/120 µs A IP 100 oC 40/120 µs A 3 300V/300A A 4 750V/750A A 5 1600V/1600A A 7.0 9.0 10 12.0 15.4 17.0 1251 975 882 2915 2272 2055 2390 1863 1685 2040 1590 1438 288 285 283 738 735 733 1588 1585 1583 12 14 16 19.9 23.2 26.0 753 645 576 1754 1503 1342 1438 1232 1100 1228 1052 939 280 277 274 730 727 724 1580 18 22 26 29.2 35.5 42.1 516 423 357 1202 986 832 986 809 682 841 690 582 271 264 258 721 714 708 30 36 43 48.4 58.1 69.4 309 258 216 720 601 503 590 493 412 504 421 352 252 242 231 702 48 54 60 77.4 87.1 96.8 195 171 156 454 398 363 372 326 298 318 279 254 223 213 203 70 90 130 113 146 209 132 102 71 308 238 165 253 195 135 216 167 115 187 154 91 160 200 280 259 322 452 58 47 33 135 110 76.9 111 90.2 63.0 94.5 77.0 53.8 41 0 0 V Over Limit 25°C IP 25 oC 40/120 µs A VC Over Limit 25°C V IPP 15,500 W 10/1000 µs A VWM Graph 17 Waveform 5A RTCA/DO-160 using 15,000 W TVS Diodes Microsemi TVS Part Numbers compliant to RTCA/DO-160 Standard Capacitance • Axial Lead 15KP22A – 280A, CA • Surface Mount PLAD15KP7.0A – 200A, CA Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. * Surge currents are reduced by clamping voltage (see Eq 1). In the table above, the first three column (VWM, VC, and IPP) are taken from the data sheet while the subsequent three 0 0 columns of 40/120 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. www.Microsemi.com Data Rev 1: 11/2013 Points for30 Curves in Graph 17 Copyright © 2013 Microsemi Corp. MicroNote 132 Aircraft Lightning Protection Graph 18: RTCA/DO-160, Waveform 5A, Levels 3 through 5, 30,000 W TVS Series Waveform 5A RTCA/DO-160 using 30,000 W TVS Diodes Data Points for Curves in Graph 18 30,000 W TVS @10/1000 µs Waveform 5A RTCA/DO-160 using 30,000 W TVS Diodes Conversion to 40/120 µs IP Values Peak Surge Currents for the Red Curves* IS Threat for Levels shown on graph Threat Levels 3-5 IP 70 oC 40/120 µs A IP 100 oC 40/120 µs A 3 300V/300A A 4 750V/750A A 5 1600V/1600A A 14 16 18 24.0 27.2 30.8 1251 1101 975 2915 2565 2272 2390 2103 1863 2040 1795 1590 276 273 269 726 723 719 1576 1573 1569 22 26 30 36.4 43.0 48.8 822 696 618 1915 1622 1440 1570 1330 1181 1379 1135 1008 264 257 251 714 707 701 1564 1557 36 43 48 58.1 69.4 77.4 516 432 390 1202 1007 909 986 826 745 841 705 636 242 231 223 692 681 673 54 60 70 87.1 96.8 113 342 312 264 797 727 615 654 596 504 558 509 430 213 203 187 663 653 78 90 110 126 146 177 240 204 168 559 475 391 458 390 320 391 332 274 174 154 123 130 160 180 209 259 291 142 116 104 331 270 242 271 221 198 232 189 169 91 41 9 220 300 400 356 483 644 84 62 46 196 144 107 161 118 88 137 101 74.9 0 Standard Capacitance • Surface Mount PLAD30KP14A – 400A, CA Add M prefix for the part numbers shown to add source control or MA, MX, or MXL for further upgrade screening options on plastic devices as described in Micronote 129. Over Limit 25°C V Over Limit 25°C IP 25 oC 40/120 µs A VC Graph 18 V IPP 30,000 W 10/1000 µs A VWM Microsemi TVS Part Numbers compliant to RTCA/DO-160 * Surge currents are reduced by clamping voltage (see Eq 1). In the table above, the first three column (VWM, VC, and IPP) are taken from the data sheet while the subsequent three 0 0 columns of 40/120 µs data were derived as illustrated earlier in this document and also MicroNoteTM 127. The 70 C and 100 C curves were added for simplifying selection since many TVS devices require derating for higher temperatures. www.Microsemi.com Data Points Rev 1: 11/2013 31 for Curves in Graph 18 Copyright © 2013 Microsemi Corp. For additional technical information, please contact Design Support at: http://www.microsemi.com/designsupport or Kent Walters ([email protected]) at 602-458-3212 Power Matters.™ www.Microsemi.com Rev 1: 11/2013 Copyright © 2013 Microsemi Corp.