Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Lxx04xx & Qxx04xx Series ® Description Sensitive type devices guarantee gate control in Quadrants I & IV needed for digital control circuitry. Standard type devices normally operate in Quadrants I & III triggered from AC line. Features & Benefits t3P)4$PNQMJBOU Agency Approval t(MBTToQBTTJWBUFE junctions Agency Agency File Number t7PMUBHFDBQBCJMJUZVQUP 1000 V -1BDLBHF& ® t4VSHFDBQBCJMJUZVQUP 55 A Main Features Symbol IT(RMS) VDRM /VRRM IGT (Q1) Value Unit 4 A 400 to 1000 V 3 to 25 mA t&MFDUSJDBMMZJTPMBUFE “L-Package” is UL recognized for 2500Vrms t4PMJETUBUFTXJUDIJOH eliminates arcing or contact bounce that create voltage transients t/PDPOUBDUTUPXFBSPVU from reaction of switching events t3FTUSJDUFEPSMJNJUFE 3'* generation, depending on activation point of sine wave t3FRVJSFTPOMZBTNBMMHBUF activation pulse in each half-cycle Applications Schematic Symbol Typical applications are AC solid-state switches, power tools, home/brown goods and white goods appliances. MT2 Sensitive gate Triacs can be directly driven by microprocessor or popular opto-couplers/isolators. MT1 Internally constructed isolated packages are offered for ease of heat sinking with highest isolation voltage. G Absolute Maximum Ratings — Sensitive Triacs (4 Quadrants) Symbol Parameter RMS on-state current (full sine wave) IT(RMS) ITSM Lxx04Ly / Lxx04Dy TC = 85°C Lxx04Ry / Lxx04Vy TC = 75°C Non repetitive surge peak on-state current (full cycle, TJ initial = 25°C) I2t I2t Value for fusing Value Unit 4 A f = 50 Hz t = 20 ms 33 f = 60 Hz t = 16.7 ms 40 tp = 8.3 ms A 6.6 A2 s 50 A/μs Critical rate of rise of on-state current (IG = 50mA with c 0.1μs rise time) f = 120 Hz TJ = 110°C IGTM Peak gate trigger current tp c 10 μs TJ = 110°C 1.2 A PG(AV) Average gate power dissipation TJ = 110°C 0.3 W Storage temperature range -40 to 150 °C Operating junction temperature range -40 to 110 °C di/dt Tstg TJ Note: xx = voltage, y = sensitivity ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. 51 Revised: July 29, 2010 09:54 AM Lxx04xx & Qxx04xx Series 4.0A TRIACs 4 Amp bi-directional solid state switch series is designed for AC switching and phase control applications such as motor speed and temperature modulation controls, lighting controls, and static switching relays. Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Absolute Maximum Ratings — Standard Triacs Symbol Parameter RMS on-state current (full sine wave) IT(RMS) ITSM Non repetitive surge peak on-state current (full cycle, TJ initial = 25°C) I2t I2t Value for fusing Value Unit 4 A Qxx04Ly / Qxx04Dy TC¡$ Qxx04Ry / Qxx04Vy TC = 85°C f = 50 Hz t = 20 ms 46 f = 60 Hz t = 16.7 ms 55 tp = 8.3 ms A 12.5 A2 s di/dt Critical rate of rise of on-state current (IG = 50mA with c 0.1μs rise time) f = 120 Hz TJ = 125°C 50 A/μs IGTM Peak gate trigger current tp ≤ 10 μs; IGT c IGTM TJ = 125°C 1.2 A PG(AV) Average gate power dissipation TJ = 125°C 0.3 W Storage temperature range -40 to 150 °C Operating junction temperature range -40 to 125 °C Tstg TJ Note: xx = voltage, y = sensitivity Electrical Characteristics (TJ = 25°C, unless otherwise specified) — Sensitive Triac (4 Quadrants) Symbol Test Conditions Quadrant *o**o*** IGT IV VD = 12V RL = 60 8 VGT VGD VD = VDRM RL = 3.3 k8 TJ = 110°C dv/dt tgt Lxx04x6 Lxx04x8 5 5 10 3 5 10 20 MAX. Unit mA MAX. 1.3 V ALL MIN. 0.2 V MAX. 400V VD = VDRM Gate Open TJ = 100°C (dv/dt)c Lxx04x5 3 ALL IT = 100mA IH Lxx04x3 TYP. 600V 5 10 10 15 25 25 30 35 15 15 20 25 mA V/μs (di/dt)c = 2.16 A/ms TJ = 110°C TYP. 0.5 1 1 1 V/μs IG = 2 x IGT PW = 15μs IT = 5.6 A(pk) TYP. 2.8 3.0 3.0 3.2 μs Electrical Characteristics (TJ = 25°C, unless otherwise specified) — Standard Triac Symbol IGT Test Conditions VD = 12V RL = 60 8 VGT VGD VD = VDRM RL = 3.3 k8 TJ = 125°C IH IT = 200mA dv/dt VD = VDRM Gate Open TJ = 125°C Quadrant Qxx04x4 Unit *o**o*** MAX. 10 25 IV TYP. 25 50 *o**o*** MAX. 1.3 1.3 MIN. 0.2 0.2 V MAX. 20 30 mA 400V 40 75 600V 30 50 ALL 800V VD = VDRM Gate Open TJ = 100°C Qxx04x3 MIN. 40 1000V mA V V/μs 50 (dv/dt)c (di/dt)c = 2.16 A/ms TJ = 125°C TYP. 2 2 V/μs tgt IG = 2 x IGT PW = 15μs IT = 5.6 A(pk) TYP. 2.5 3.0 μs Note: xx = voltage, x = package Lxx04xx & Qxx04xx Series 52 Revised: July 29, 2010 09:54 AM ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Static Characteristics (TJ = 25°C, unless otherwise specified) Test Conditions VTM ITM = 5.6A tp = 380 μs MAX. Lxx04xy IDRM VDRM = VRRM IRRM MAX. Qxx04xy Value Unit 1.60 V TJ = 25°C 400-600V 5 μA TJ = 110°C 400-600V 200 μA TJ = 25°C 400-1000V 10 μA TJ = 125°C 400-800V 2 TJ = 100°C 1000V 3 4.0A TRIACs Symbol mA Thermal Resistances Symbol Parameter Value L/Qxx04Dy 3.5 L/Qxx04Ly 3.6 L/Qxx04Ry 3.6 L/Qxx04Vy 6.0 L/Qxx04Ly 50 Unit Junction to case (AC) RR(J-C) °C/W Junction to ambient RR(J-A) L/Qxx04Ry 45 L/Qxx04Vy 70 °C/W Note: xx = voltage, x = package, y = sensitivity Figure 2: Normalized DC Gate Trigger Current for All Quadrants vs. Junction Temperature Figure 1: Definition of Quadrants ALL POLARITIES ARE REFERENCED TO MT1 (+) IGT GATE MT1 IGT REF (-) MT1 IGT GATE (+) 3.0 2.0 REF QII QI QIII QIV MT2 IGT IGT GATE MT2 IGT (TJ = 25°C) (-) + 4.0 + Ratio of MT2 MT2 POSITIVE (Positive Half Cycle) IGT MT2 1.0 IGT GATE 0.0 MT1 REF - MT2 NEGATIVE (Negative Half Cycle) ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. MT1 -65 -40 -40 10 35 60 85 110 125 Junction Temperature (TJ)- ºC REF 53 Revised: July 29, 2010 09:54 AM Lxx04xx & Qxx04xx Series Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Figure 3: Normalized DC Holding Current vs. Junction Temperature Figure 4: Normalized DC Gate Trigger Voltage for All Quadrants vs. Junction Temperature 2.0 VGT 2.0 VGT (TJ = 25°C) 3.0 Ratio of IH Ratio of IH (TJ = 25°C) 4.0 1.0 1.5 1.0 0.5 0.0 0.0 -65 -40 -40 10 35 60 85 110 -65 125 -40 -40 Junction Temperature (TJ)- ºC 10 Figure 5: Power Dissipation (Typical) vs. RMS On-State Current 60 85 110 125 Figure 6: Maximum Allowable Case Temperature vs. On-State Current 4.0 110 CURRENT WAVE FORM: Sinusoidal LOAD: Resistive or Inductive CONDUCTION ANGLE: 360° CASE TEMPERATURE: Measured as shown on Dimensional Drawing 105 CURRENT WAVE FORM: Sinusoidal 3.0 Maximum Allowable Case Temperature (TC) - °C Average On-State Power Dissipation (PD(AV)) - Watts 35 Junction Temperature (TJ)- ºC LOAD: Resistive or Inductive CONDUCTION ANGLE: 360° 2.0 1.0 100 95 Lxx04Ly Lxx04Dy 90 85 Lxx04Vyz Lxx04Ry LXX04Vy 80 75 70 65 60 0.0 0.0 1.0 2.0 3.0 4.0 0 5.0 1 2 Figure 7: Maximum Allowable Case Temperature vs. On-State Current 4 5 6 Figure 8: Maximum Allowable Ambient Temperature vs. On-State Current 120 110 100 95 Maximum Allowable Ambient Temperature (TA) - °C CURRENT WAVE FORM: Sinusoidal LOAD: Resistive or Inductive CONDUCTION ANGLE: 360° CASE TEMPERATURE: Measured as shown on Dimensional Drawing 105 Maximum Allowable Case Temperature (TC) - °C 3 RMS On-State Current (IT(RMS)) - Amps RMS On-State Current (IT(RMS)) - Amps Lxx04Ly Lxx04Dy 90 85 Lxx04Vyz Lxx04Ry LXX04Vy 80 75 70 CURRENT WAVEFORM: Sinusoidal LOAD: Resistive or Inductive CONDUCTION ANGLE: 360° FREE AIR RATING – NO HEATSINK 100 80 Qxx04Ly Qxx04Ry 60 L/Qxx04Vy 40 Lxx04Ly 65 20 60 0 1 2 3 4 5 0.0 6 RMS On-State Current (IT(RMS)) - Amps 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 RMS On-State Current [IT(RMS)] - Amps Note: xx = voltage, y = sensitivity Lxx04xx & Qxx04xx Series 54 Revised: July 29, 2010 09:54 AM ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Figure 9: On-State Current vs. On-State Voltage (Typical) 20 TJ = 25°C 16 14 12 10 8 4.0A TRIACs Positive or Instantaneous On-State Current (IT) - Amps 18 6 4 2 0 0.6 0.8 1.0 1.2 1.4 1.6 1.8 Positive or Instantaneous On-State Voltage (VT) - Volts Figure 10: Surge Peak On-State Current vs. Number of Cycles Peak Surge (Non-repetitive) On-State Current (ITSM) – Amps 100 4VQQMZ'SFRVFODZ)[4JOVTPJEBM Load: Resistive RMS On-State [IT(RMS)]: Max Rated Value at Specific Case Temperature Qxx04Ry Qxx04Ly Qxx04Dy Qxx04Vy Notes: 1. Gate control may be lost during and immediately following surge current interval. 2. Overload may not be repeated until junction temperature has returned to steady-state rated value. Lxx04Ry Lxx04Ly Lxx04Dy Lxx04Vy 10 1 1 10 100 1000 Surge Current Duration – Full Cycles Note: xx = voltage, y = sensitivity ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. 55 Revised: July 29, 2010 09:54 AM Lxx04xx & Qxx04xx Series Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Soldering Parameters 1Co'SFFBTTFNCMZ - Temperature Min (Ts(min)) Pre Heat 150°C - Temperature Max (Ts(max)) 200°C - Time (min to max) (ts) oTFDT Average ramp up rate (Liquidus Temp) (TL) to peak 5°C/second max TS(max) to TL - Ramp-up Rate 5°C/second max Reflow - Temperature (TL) (Liquidus) 217°C - Temperature (tL) oTFDPOET tP TP Temperature Reflow Condition Ramp-up TL tL TS(max) Preheat TS(min) tS 25 Peak Temperature (TP) 260°C +0/-5 Time within 5°C of actual peak Temperature (tp) oTFDPOET Ramp-down Rate 5°C/second max Time 25°C to peak Temperature (TP) 8 minutes Max. Do not exceed 280°C time to peak temperature Physical Specifications Test 100% Matte Tin-plated Body Material UL recognized epoxy meeting flammability DMBTTJmDBUJPO7 Specifications and Conditions AC Blocking Temperature Cycling Copper Alloy Temperature/ Humidity Design Considerations High Temp Storage Careful selection of the correct device for the application’s operating parameters and environment will go a long way toward extending the operating life of the Thyristor. Good design practice should limit the maximum continuous current through the main terminals to 75% of the device rating. Other ways to ensure long life for a power discrete semiconductor are proper heat sinking and selection of voltage ratings for worst case conditions. Overheating, overvoltage (including dv/dt), and surge currents are the main killers of semiconductors. Correct mounting, soldering, and forming of the leads also help protect against component damage. Low-Temp Storage Lxx04xx & Qxx04xx Series Time Environmental Specifications Terminal Finish Terminal Material Ramp-do Ramp-down Thermal Shock Autoclave MIL-STD-750, M-1040, Cond A Applied Peak AC voltage @ 125°C for 1008 hours MIL-STD-750, M-1051, 100 cycles; -40°C to +150°C; 15-min dwell time &*"+&%&$+&4%" 1008 hours; 320V - DC: 85°C; 85% rel humidity MIL-STD-750, M-1031, 1008 hours; 150°C 1008 hours; -40°C MIL-STD-750, M-1056 10 cycles; 0°C to 100°C; 5-min dwell time at each temperature; 10 sec (max) transfer time between temperature &*"+&%&$+&4%" 168 hours (121°C at 2 ATMs) and 100% R/H Resistance to Solder Heat MIL-STD-750 Method 2031 Solderability ANSI/J-STD-002, category 3, Test A Lead Bend .*-45%.$POE& 56 Revised: July 29, 2010 09:54 AM ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Dimensions — TO-220AB (R-Package) — Non-Isolated Mounting Tab Common with Center Lead O A E Dimension 8.13 .320 P MT2 B C 13.36 .526 D 7.01 .276 NOTCH IN GATE LEAD TO ID. NON-ISOLATED TAB F R G L H K N J /PUF.BYJNVNUPSRVFUP be applied to mounting tab JTJOMCT/N M MT1 MT2 GATE Inches Millimeters Min Max Min Max A 0.380 0.420 10.67 B 0.105 0.115 2.67 C 0.230 0.250 5.84 6.35 D 0.620 15.75 & 0.142 0.147 3.61 3.73 ' 0.110 0.130 3.30 G 0.540 0.575 13.72 14.61 H 0.025 0.035 0.64 J 0.205 5.21 K 0.105 2.41 2.67 L 0.060 0.075 1.52 M 0.085 2.16 2.41 N 0.018 0.024 0.46 0.61 O 0.178 0.188 4.52 4.78 P 0.045 0.060 1.14 1.52 R 0.038 0.048 1.22 Min Max Min Max Dimensions — TO-220AB (L-Package) — Isolated Mounting Tab AREA (REF.) 0.17 IN2 TC MEASURING POINT O A E Dimension 8.13 .320 P B C 13.36 .526 D 7.01 .276 F Inches Millimeters A 0.380 0.420 10.67 B 0.105 0.115 2.67 C 0.230 0.250 5.84 6.35 D 0.620 15.75 & 0.142 0.147 3.61 3.73 ' 0.110 0.130 3.30 G 0.540 0.575 13.72 14.61 H 0.025 0.035 0.64 R G L H K N J MT1 MT2 GATE M /PUF.BYJNVNUPSRVFUP be applied to mounting tab JTJOMCT/N ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. J 0.205 5.21 K 0.105 2.41 2.67 L 0.060 0.075 1.52 M 0.085 2.16 2.41 N 0.018 0.024 0.46 0.61 O 0.178 0.188 4.52 4.78 P 0.045 0.060 1.14 1.52 R 0.038 0.048 1.22 57 Revised: July 29, 2010 09:54 AM Lxx04xx & Qxx04xx Series 4.0A TRIACs AREA (REF.) 0.17 IN2 TC MEASURING POINT Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Dimensions — TO-251AA (V-Package) — V-PAK Through Hole AREA: 0.040 IN2 TC MEASURING POINT E MT2 H D Dimension 5.28 .208 J A 5.34 .210 B R P Q S K C MT1 L F MT2 GATE Inches Millimeters Min Typ Max Min Typ Max A 0.040 0.044 0.050 1.02 1.11 1.27 B 0.235 0.242 0.245 6.15 6.22 C 0.350 0.361 0.375 D 0.205 0.208 0.213 5.21 5.41 & 0.255 0.262 0.265 6.48 6.66 6.73 ' 0.027 0.031 0.033 0.80 0.84 G 0.087 2.21 2.28 2.36 H 0.085 2.16 2.34 2.41 I 0.176 0.180 0.184 4.47 4.57 4.67 J 0.018 0.020 0.023 0.46 0.51 0.58 K 0.038 0.040 0.044 1.01 1.12 L 0.018 0.020 0.023 0.46 0.52 0.58 G I P 0.042 0.047 0.052 1.06 1.20 1.32 Q 0.034 0.044 0.86 1.00 1.11 R 0.034 0.044 0.86 1.00 1.11 S 0.074 0.084 1.86 2.00 2.11 Dimensions — TO-252AA (D-Package) — D-PAK Surface Mount MT2 E D 6.71 .264 5.28 .208 TC MEASURING POINT Dimension 6.71 .264 B 1.60 .063 P Q C 1.80 .071 GATE F MT1 MT2 AREA : 0.040 IN2 3 .118 G 4.60 .181 I O Millimeters Min Typ Max Min Typ Max A 0.040 0.043 0.050 1.02 1.27 B 0.235 0.243 0.245 6.16 6.22 C 0.106 0.108 0.113 2.74 2.87 D 0.205 0.208 0.213 5.21 5.41 & 0.255 0.262 0.265 6.48 6.65 6.73 A 5.34 .210 Inches ' 0.027 0.031 0.033 0.80 0.84 G 0.087 2.21 2.28 2.36 H 0.085 2.16 2.33 2.41 I 0.176 0.184 4.47 4.55 4.67 J 0.018 0.020 0.023 0.46 0.51 0.58 K 0.038 0.040 0.044 1.02 1.12 L K J H M N Lxx04xx & Qxx04xx Series L 0.018 0.020 0.023 0.46 0.51 0.58 M 0.000 0.000 0.004 0.00 0.00 0.10 N 0.021 0.026 0.027 0.53 0.67 O 0° 0° 5° 0° 0° 5° P 0.042 0.047 0.052 1.06 1.20 1.32 Q 0.034 0.044 0.86 1.00 1.11 58 Revised: July 29, 2010 09:54 AM ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs Product Selector Gate Sensitivity Quadrants Type Package 3 mA Sensitive Triac TO-220L 3 mA 3 mA Sensitive Triac TO-252 D-PAK X 3mA 3mA Sensitive Triac TO-220R X X 3 mA 3 mA Sensitive Triac TO-251 V-PAK Lxx04L5 X X 5 mA 5 mA Sensitive Triac TO-220L Lxx04D5 X X 5 mA 5 mA Sensitive Triac TO-252 D-PAK Lxx04R5 X X 5mA 5mA Sensitive Triac TO-220R Lxx04V5 X X 5 mA 5 mA Sensitive Triac TO-251 V-PAK Lxx04L6 X X 5 mA 10 mA Sensitive Triac TO-220L Lxx04D6 X X 5 mA 10 mA Sensitive Triac TO-252 D-PAK Lxx04R6 X X 5mA 10mA Sensitive Triac TO-220R Lxx04V6 X X 5 mA 10 mA Sensitive Triac TO-251 V-PAK Lxx04L8 X X 10 mA 20 mA Sensitive Triac TO-220L Lxx04D8 X X 10 mA 20 mA Sensitive Triac TO-252 D-PAK Lxx04R8 X X 10mA 20mA Sensitive Triac TO-220R Lxx04V8 X X 10 mA 20 mA Sensitive Triac TO-251 V-PAK Qxx04L3 X X 10 mA Standard Triac TO-220L Qxx04D3 X X 10 mA Standard Triac TO-252 D-PAK Qxx04V3 X X 10 mA Standard Triac TO-251 V-PAK Qxx04R3 X X 10mA Standard Triac TO-220R Qxx04L4 X X X X 25 mA Standard Triac TO-220L Qxx04D4 X X X X 25 mA Standard Triac TO-252 D-PAK Qxx04R4 X X X X 25mA Standard Triac TO-220R Qxx04V4 X X X X 25 mA Standard Triac TO-251 V-PAK 400V 600V Lxx04L3 X Lxx04D3 800V 1000V I – II – III IV X 3 mA X X Lxx04R3 X Lxx04V3 Packing Options Part Number L/Q004L/Ry/TP Marking Weight Packing Mode Base Quantity L/Qxx04L/Ry 2.2 g Bulk 500 L/Qxx04LyTP L/Qxx04Ly 2.2 g Tube 500 (50 per tube) L/Qxx04DyRP L/Qxx04Dy 0.3 g &NCPTTFE$BSSJFS 2500 L/Qxx04DyTP L/Qxx04Dy 0.3 g Tube Pack 750 (75 per tube) L/Qxx04VyTP L/Qxx04Vy 0.4 g Tube Pack 750 (75 per tube) Note: xx = Voltage; y = Sensitivity ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information. 59 Revised: July 29, 2010 09:54 AM Lxx04xx & Qxx04xx Series 4.0A TRIACs Voltage Part Number Teccor® brand Thyristors 4 Amp Sensitive & Standard Triacs TO-252 Embossed Carrier Reel Pack (RP) Specifications Meets all EIA-481-2 Standards 0.157 (4.0) * Cover tape 0.315 (8.0) MT1 XXXXXX XX XXXXXX DC XX XXXXXX DC * XX 0.524 (13.3) XXXXXX 0.63 (16.0) DC 0.059 DIA (1.5) Gate MT2 12.99 (330.0) 0.512 (13.0) Arbor Hole Dia. Dimensions are in inches (and millimeters). 0.64 (16.3) Direction of Feed Part Numbering System Part Marking System Q 60 04 L 4 xx DEVICE TYPE L : Sensitive Triac Q : Standard Triac TO-220 AB (R & L Packages) LEAD FORM DIMENSIONS xx : Lead Form Option TO-251AA & TO-252AA (V and D Packages) Lxx04xx & Qxx04xx Series yxxxx CURRENT RATING 04 : 4A ® L6004V4 ® VOLTAGE RATING 40 : 400V 60 : 600V 80 : 800V K0 : 1000V SENSITIVITY & TYPE Sensitive Triac: 3 : 3 mA (QI, II, III, IV) 5 : 5 mA (QI, II, III, IV) 6 : 5 mA (QI, II, III) 10 mA (QIV) 8 : 10 mA (QI, II, III) 20 mA (QIV) Standard Triac: 3 : 10 mA (QI, II, III) 4 : 25 mA (QI, II, III) PACKAGE TYPE L :TO-220 Isolated R :TO-220 Non-Isolated V :TO-251 (V-Pak) D :TO-252 (D-Pak) 60 Revised: July 29, 2010 09:54 AM ©2010 Littelfuse, Inc Specifications are subject to change without notice. Please refer to http://www.littelfuse.com for current information.