Metal-Oxide Varistors (MOVs) Surface Mount Varistors > CH Series CH Varistor Series RoHS Description CH Series transient surge suppressors are small, metal-oxide varistors (MOVs) manufactured in leadless chip form. They are intended for use in a variety of applications from low voltage DC to off-line board-level protection. These devices, which have significantly lower profiles than traditional radial lead varistors, permit designers to reduce the size and weight and increase the reliability of their equipment designs. CH Series varistors are available in a voltage range from 14V to 275V (VM(AC)RMS), and energy ratings up to 8J. See the Littelfuse Multilayer Suppressor Series also. Agency Approvals Recognized under the components program of Underwriters Laboratories. Agency Agency Approval Agency File Number UL1449 E320116 Features •Lead–free • Leadless, surface mount chip in 5 x 8mm Size • Voltage ratings VM(AC)RMS 14V to 275V • Supplied in tape and reel or bulk pack • No derating up to 125ºC ambient • High surge rated up to 400A for low voltage devices Absolute Maximum Ratings • For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous CH Series Units Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) 14 to 275 V DC Voltage Range (VM(DC)) 18 to 369 V 100 to 400 A Transient: Peak Pulse Current (ITM) For 8/20µs Current (See Figure 2) Single Pulse Energy Range 1.0 to 8.0 J Operating Ambient Temperature Range (TA) For 10/1000µs Current Wave (WTM) -55 to +125 ºC Storage Temperature Range (TSTG) -55 to +150 ºC <0.01 %/ºC Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Additional Information Datasheet Resources © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/04/15 Samples Metal-Oxide Varistors (MOVs) Surface Mount Varistors > CH Series Device Ratings and Specifications Maximum Ratings (125ºC) Continuous Part Number Specifications (25ºC) Varistor Voltage at 1 mA DC Max Clamping Volt VC at Test Current (8/20µs) Test Current Transient Typical Capacitance VRMS VDC VM(AC) VM(DC) Energy (10/1000µ s) WTM Peak Current (8/20µs) ITM (V) (V) (J) MIN VN(DC) MAX VC IP f=1MHz (A) (V) (V) (V) (V) (A) (pF) V22CH8 14 18 (Note 3) 1.0 (Note2) 100 18.7 22.0 26.0 47 5 1600 V27CH8 17 22 1.0 100 23.0 27.0 31.1 57 5 1300 V33CH8 20 26 1.0 100* 29.5 33.0 36.5 68 5 750 V39CH8 25 31 1.0 100* 35.0 39.0 43.0 79 5 700 V47CH8 30 38 1.2 100* 42.0 47.0 52.0 92 5 650 V56CH8 35 45 1.4 100* 50.0 56.0 62.0 107 5 600 V68CH8 40 56 1.5 100* 61.0 68.0 75.0 127 10 500 V120CH8 75 102 2.0 250 108.0 120.0 132.0 200 10 300 V150CH8 95 127 3.0 250 135.0 150.0 165.0 250 10 250 V180CH8 115 153 4.0 250 162.0 180.0 198.0 295 10 120 V200CH8 130 175 4.0 250 184.0 200.0 228.0 340 10 110 V220CH8 140 180 5.0 250 198.0 220.0 242.0 360 10 105 V240CH8 150 200 5.0 250 212.0 240.0 268.0 395 10 100 V360CH8 230 300 6.0 250 324.0 360.0 396.0 595 10 70 V390CH8 250 330 7.0 250 354.0 390.0 429.0 650 10 60 V430CH8 275 369 8.0 250 389.0 430.0 473.0 710 10 50 NOTES: 1. Power dissipation of transients not to exceed 0.25W. 2.Energy rating for impulse duration of 30ms minimum to one half of peak current value. 3.Also rated to withstand 24V for 5 minutes. 4. The Typical Capacitance is for reference only 5. *High Surge Option (up to 400A) available for relevant voltage ratings. Current, Energy and Power Derating Curve 100 PERCENT OF RATED VALUE Continuous power dissipation capability is not an applicable design requirement for a suppressor, unless transients occur in rapid succession. Under this condition, the average power dissipation required is simply the energy (watt-seconds) per pulse times the number of pulses per second. The power so developed must be within the specifications shown on the Device Ratings and Specifications Table for the specific device. Furthermore, the operating values need to be derated at high tempera tures as shown in this diagram. Because varistors can only dissipate a relatively small amount of average power they are, therefore, not suitable for repetitive applications that involve substantial amounts of average power dissipation. 90 80 70 60 50 40 30 20 10 0 -55 Figure 1 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE ( oC) FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/04/15 Metal-Oxide Varistors (MOVs) Surface Mount Varistors > CH Series PERCENT OF PEAK VALUE Peak Pulse Current Test Waveform 01 = Virtual Origin of Wave T = Time from 10% to 90% of Peak T1 =Origin Riseof Time O1 = Virtual Wave= 1.25 x T T2From = Decay T = Time 10% Time to 90% of Peak Front time = 1.25 • t T1 = Virtual Example: T2 = Virtual to Half (Impulse Duration) ForTime an 8/20 µs Value Current Waveform: Example: For an 8/20 s Current Waveform: 8µs = T = Rise Time 8 s = T1 = Virtual 1Front Time = TTime = Decay Virtual to Half Time Value 20 s = T2 =20µs 2 100 90 50 10 O1 T TIME T1 Figure 2 T2 FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM Clamping Voltage for V22CH8 – V68CH8 4,000 MAXIMUM CLAMPING VOLTAGE MODEL SIZE 5 x 8mm 22 TO 56VN(DC) RATING TA = -55oC TO 125 oC 200 100 90 80 70 60 50 40 V68CH8 V56CH8 V47CH8 V39CH8 V33CH8 V27CH8 V22CH8 30 20 10 10 -3 10 -2 10 -1 Figure 3 10 0 MAXIMUM CLAMPING VOLTAGE MODEL SIZE 5 x 8mm 100 TO 430VN(DC) RATING TA = -55oC TO 125 oC 3,000 MAXIMUM PEAK VOLTS (V) MAXIMUM PEAK VOLTS (V) 500 400 300 Clamping Voltage for V120CH8 – V430CH8 10 1 10 2 2,000 1,000 900 800 700 600 500 400 300 200 V180CH8 V150CH8 V120CH8 10 3 Figure 4 PEAK AMPERES (A) FIGURE 3. CLAMPING VOLTAGE FOR V22CH8 - V68CH8 V240CH8 V220CH8 V200CH8 V430CH8 V390CH8 V360CH8 100 10 -3 10 -2 10 -1 10 0 10 1 10 2 PEAK AMPERES (A) 10 3 10 4 FIGURE 4. CLAMPING VOLTAGE FOR V120CH8 - V430CH8 Pulse Rating Curves Surge Current Rating Curves for V22CH8 - V56CH8 2,000 1 SURGE CURRENT (A) 200 MODEL SIZE 5 x 8mm V22CH8 - V56CH8 2 100 10 50 10 2 10 5 INDEFINITE 0.2 20 10 2 10 3 10 4 10 5 2 200 10 100 50 20 10 10 6 5 1 0.5 Figure 5 1 500 10 4 10 5 10 6 10 3 2 MODEL SIZE 5 x 8mm V120CH8 - V430CH8 1,000 SURGE CURRENT (A) 500 20 Surge Current Rating Curves for V120CH8 - V430CH8 INDEFINITE 2 1 100 1,000 IMPULSE DURATION (µs) 10,000 Figure 6 20 100 1,000 10,000 IMPULSE DURATION (µs) NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than +/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may result in FIGURE 5. SURGE CURRENT RATING CURVES FOR FIGUREand 6. SURGE CURRENT RATING CURVES FOR the device not meeting the original published specifications, but it does not prevent the device from continuing to function, to provide ample protection. V22CH8 - V56CH8 V120CH8 - V430CH8 © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/04/15 Metal-Oxide Varistors (MOVs) Surface Mount Varistors > CH Series Lead (Pb) Soldering Recommendations Wave soldering is the most strenuous of the processes. To avoid the possibility of generating stresses due to thermal shock, a preheat stage in the soldering process is recommended, and the peak temperature of the solder process should be rigidly controlled. When using a reflow process, care should be taken to ensure that the CH chip is not subjected to a thermal gradient steeper than 4 degrees per second; the ideal gradient being 2 degrees per second. During the soldering process, preheating to within 100 degrees of the solder's peak temperature is essential to minimize thermal shock. Once the soldering process has been completed, it is still necessary to ensure that any further thermal shocks are avoided. One possible cause of thermal shock is hot printed circuit boards being removed from the solder process and subjected to cleaning solvents at room temperature. The boards must be allowed to cool gradually to less than 50ºC before cleaning. 250 MAXIMUM TEMPERATURE 230°C 200 250 TEMPERATURE °C TEMPERATURE °C CH series devices have silver-platinum terminals (Ag/Pt), and the recommended solder is 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also recommends an RMA solder flux. Reflow Solder Profile 40-80 SECONDS MAXIMUM TEMPERATURE ABOVE 183°C 230°C 150 200 RAMP RATE40-80 <2°C/s SECONDS ABOVE 183°C PREHEAT DWELL RAMP RATE <2°C/s PREHEAT ZONE 100 150 50 100 PREHEAT DWELL 0 50 0 Figure 7 ZONE 0.5 PREHEAT 1.0 1.5 2.0 2.5 3.0 3.5 4.0 3.5 4.0 TIME (MINUTES) 0 FIGURE 14. REFLOW SOLDER 0.5 1.0 1.5 2.0 2.5PROFILE 3.0 0 Wave Solder Profile TIME (MINUTES) FIGURE 14. REFLOW SOLDER PROFILE 300 MAXIMUM WAVE 260°C 250 TEMPERATURE °C TEMPERATURE °C The principal techniques used for the soldering of components in surface mount technology are IR Re-flow and Wave soldering. Typical profiles are shown on the right. 300 200 MAXIMUM WAVE 260°C 250 150 SECOND PREHEAT 200 100 150 FIRST PREHEAT SECOND PREHEAT 50 100 0 500.0 Figure 8 0 0.0 Lead–free (Pb-free) Soldering Recommendations 0.5 1.0 FIRST PREHEAT 1.5 2.0 2.5 3.0 TIME (MINUTES) 3.5 4.0 4.5 FIGURE WAVE2.0SOLDER 0.5 1.0 15.1.5 2.5 PROFILE 3.0 3.5 TIME (MINUTES) 4.0 4.5 FIGURE 15. WAVE SOLDER PROFILE The reflow profile must be constrained by the maximums in the Lead–free Reflow Profile. For Lead–free Wave soldering, the Wave Solder Profile still applies. Note: the Lead–free paste, flux and profile were used for evaluation purposes by Littelfuse, based upon industry standards and practices. There are multiple choices of all three available, it is advised that the customer explores the optimum combination for their process as processes vary considerably from site to site. 300 Lead–free Re-flow Solder Profile MAXIMUM TEMPERATURE 250˚C, TEMPERATURE °C TEMPERATURE °C CH series devices have silver-platinum terminals (Ag/Pt), and the recommended Lead-free solder is 96.5/3.0/0.5 (SnAgCu) with an RMA flux, though there is a wide selection of pastes and fluxes available that should be compatible. TIME WITHIN 5˚C OF PEAK 20 SECONDS MAXIMUM 250 300 RAMP RATE MAXIMUM TEMPERATURE 260˚C, <3˚C/s TIME WITHIN 5˚C OF PEAK 20 SECONDS MAXIMUM 200 250 150 200 RAMP RATE <3˚C/s 100 150 0 50 0 0 60 - 150 SEC > 217˚C PREHEAT ZONE 50 100 Figure 9 60 - 150 SEC > 217˚C 0 PREHEAT ZONE 1.0 2.0 3.0 4.0 5.0 6.0 7.0 TIME (MINUTES) FIGURE 16. LEAD-FREE RE-FLOW SOLDER PROFILE 1.0 2.0 3.0 4.0 5.0 6.0 7.0 TIME (MINUTES) FIGURE 16. LEAD-FREE RE-FLOW SOLDER PROFILE © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/04/15 Metal-Oxide Varistors (MOVs) Surface Mount Varistors > CH Series Part Numbering System V 220 CH 8 X PACKAGING OPTIONS No Letter: Standard 13 Inch Reel T: 7 Inch Reel S: Bulk Pack RELATIVE SIZE INDICATOR LITTELFUSE VARISTOR NOMINAL VARISTOR VOLTAGE SERIES DESIGNATOR Dimensions PAD LAYOUT DIMENSIONS Symbol C NOTE 1 Max Millimeters Min Max 0.402 10.210 B 0.216 5.500 C 0.087 2.210 A B A Inches Min 2.00 D - 0.080 - E 0.016 0.050 0.41 1.27 L 0.311 0.335 7.90 8.51 W 0.185 0.207 4.70 5.26 NOTE: Avoid metal runs in this area. Soldering recommendations: Material - 62/36/2 Sn/Pb/ Ag or equivalent.Temperature – 230ºC Max., 5s. Max. Flux - R.M.A. CHIP LAYOUT DIMENSIONS E L D W © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/04/15 Metal-Oxide Varistors (MOVs) Surface Mount Varistors > CH Series Tape and Reel Specifications Symbol P0 E W P P2 F K0 D SECTION THRU CAVITY B0 A0 D1 PLAN VIEW OF STRIP R2 K0 Cavity Length 8.8 -/+ 0.1 Cavity Width 5.5 -/+ 0.1 K0 Cavity Depth 2.0 Min. H0 Ref. Plane for A0 and B0 + 0.10 0.3 - 0.05 R1, R2, R3 Tape Cavity Radii 0.5 Max. T Carrier Tape Thickness 1.0 Max. T1 Cover Tape Thickness E Sprocket Hole from Edge 1.75 -/+ 0.1 P0 Sprocket Hole Pitch 4.0 -/+ 0.1 D Sprocket Hole Diameter K R4 MINIMUM BENDING RADIUS R3 A0 B0 A0 T CROSS SECTION (REF. PLANE FOR A 0 & B0) H0 B0 Size (mm) T1 T R1 Parameter REELED RADIUS DETAILS CAVITY DETAILS P2 Hole Centre to Component Centre R4 Min. Bending Radius D1 Ejection Hole Diameter K Overall Thickness P Pitch Of Component F Sprocket Hole to Ejection Hole W Carrier Tape Width 0.1 Max. + 0.1 1.5 - 0.0 2.0 -/+ 0.15 30.5 Min. 1.5 Min. 3.0 Min. 8.0 -/+ 0.1 7.5 -/+ 0.1 16.0 -/+ 0.3 Notes : • Conforms to EIA-481-1, Revision A • Can be supplied to IEC P ublication 286-3 Standard Packaging* Special Packaging CH Series varistors are always shipped in tape and reel. The standard 13-inch reel utilized contains 4000 pieces. Option 1 Note also that the CH Series receives no branding on the chip itself. Option 2 *NOTE: It is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags. 7-inch reels containing 1000 pieces are available. To order 7-inch reels add a 'T' suffix to the part number; e.g., V47CH8T. For small quantities (less than 100 pieces) the units are shipped bulk pack. To order, add a 'S' suffix to the part number; e.g., V47CH8S. Ordering Notes: X3313: HIGH SURGE RATING OPTION -Low voltage (V22~V68) standard parts high surge rating to 100A, to order high surge rated up to 400A with suffix X3313. Example: Standard Model Order As V33CH8 V33CH8X3313 © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 11/04/15