PolySwitch(R) Resettable PPTCs Telecom > Surface Mount > TS Series TS Series RoHS Description Littelfuse PolySwitch products for telecommunication and networking devices help to meet the growing demand for resettable overcurrent protection. They also provide protection against damage caused by power cross and induced power surges as defined by ITU, Telcordia GR1089, and IEC 62368-1. Littelfuse offers chip, surfacemount, and radial-leaded configurations. Applications Networking Machines and Systems: Features * Resettable overcurrent protection * Fast time-to-trip * Resistance sorted and matched devices available * Low parasitic capacitance/flat impedance with frequency * Recognized to UL 1434, approved to CSA TIL No. CA-3A and EN 60730-1. Agency Approvals AGENCY * Modem * Analog and digital line card * Phone set * xDSL modem and splitter * Fax machine * Powered Ethernet system * Phone wall outlet * VoIP (Voice over Internet Protocol) equipment * Alarm system * LAN, WAN equipment * PBX system * Customer premise equipment * MDF module * Access network hardware * T1/E1 equipment Additional Information AGENCY FILE/CERTIFICATE NUMBER E74889* Datasheet Samples Resources 78166* 72161787* * See Electrical Characteristic Table for approved part numbers. Electrical Characteristics Part Number VMAX IMAX IH IT Operating Interrupt Interrupt PD Typ (A) (A) (VDC) (VRMS) (A) (W) Max Time-to-trip TSL250-080F 0.080 0.240 80 250 3.0 1.2 1.0 0.8 5.0 TSL250-130F 0.130 0.260 60 250 3.0 1.5 1.0 2.0 4.0 0.130 0.260 60 250 3.0 1.1 1.0 0.9 6.5 -- -- 60 600 1.0 -- -- -- -- -- -- 0.130 0.260 60 250 3.0 1.1 1.0 1.4 6.5 9.0 15.0** -- -- 60 600 1.0 -- -- -- -- -- -- TS250-130F-RB 0.130 -- 0.260 -- 60 60 250 600 3.0 1.0 1.1 -- 1.0 -- 0.7 -- 9.0 -- 12.0 -- TS250-130F-RC 0.130 -- 0.260 -- 60 60 250 600 3.0 1.0 1.1 -- 1.0 -- 1.1 -- 7.0 -- 10.0 -- (A) (s) RMIN RMAX R1MAX () () () Agency Approvals 11.0 20.0** x x x 8.0 12.0** -- -- -- 12.0 20.0** x x x x x -- 20.0** -- x x -- 17.0** -- x x -- TS250/TSL250/TSM250/TSV250 - Surface-mount -- 250VAC TS250-130F TS250-130F-RA (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 PolySwitch(R) Resettable PTCs Telecom > Surface Mount > TS Series Electrical Characteristics VMAX Part Number IMAX IH IT Operating Interrupt Interrupt PD Typ (A) (A) (VDC) (VRMS) (A) (W) Max Time-to-trip TSM250-130F 0.130 0.260 60 250 3.0 1.5 1.0 2.4 TSM250-130F-RA 0.130 0.260 60 250 3.0 1.5 1.0 TSV250-130F 0.130 0.260 60 250 3.0 1.5 1.0 TSV250-184F 0.184 0.690 100 250 10.0 0.9 3.0 TS600-170F 0.170 0.400 60 600 3.0 2.5 1.0 TS600-200F-RA-B-0.5 0.200 0.400 60 600 3.0 2.5 1.0 TS600-400F 0.400 1.000 60 600 3.0 2.0 3.0 5.0 (A) RMIN RMAX R1MAX () () () 4.0 9.0 15.0 x -- -- 2.4 4.0 22.0 30.0 -- -- -- 2.0 4.0 7.0 12.0** x x x 0.5 1.2 3.0 4.0** x -- -- 10.0 4.0 9.0 18.0 x x -- 12.0 4.0 7.5 13.5 x x -- 0.5 1.1 2.0 x x -- (s) Agency Approvals TS250/TSL250/TSM250/TSV250 - Surface-mount -- 250VAC TS600 - Surface-mount -- 600VAC (Single Channel) TSM600 - Surface-mount -- 600VAC (Dual Channel) TSM600-250F 0.250 0.860 250 600 3.0 2.0 3.0 0.8 1.0 3.5 7.0 x x -- TSM600-250F-RA 0.250 0.860 250 600 3.0 2.0 3.0 1.0 1.0 3.0 5.0 x x -- TSM600-400F 0.400 1.000 250 600 3.0 2.0 3.0 5.0 0.5 1.1 2.0 x -- -- Notes: IH :Hold current: maximum current device will pass without interruption in 20C still air. IT :Trip current: minimum current that will switch the device from low resistance to high resistance in 20C still air. VMAX Operating:Maximum continuous voltage device can withstand without damage at rated current. This voltage is used for component Recognition under UL1434. VMAX Interrupt: Maximum voltage that can be safely placed across a device in its tripped state. IMAX Interrupt :Maximum fault current device can withstand without damage at rated operating voltage. This current is used for component Recognition under UL1434. Devices may trip safely under higher level power cross conditions to assist equipment in meeting the appropriate ITU, UL60950 or GR1089 industry requirements. PD :Power dissipated from device when in the tripped state in 20C still air. RMIN :Minimum resistance of device as supplied at 20C unless otherwise specified. RMAX :Maximum resistance of device as supplied at 20C unless otherwise specified. R1MAX :Maximum resistance measured one hour post-trip or post-reflow at 20C. ** Applies to all products which share the same prefix. Typical Time-to-Trip Curves at 25C 100 B C D B 100 A 1 A B C D 0.1 0.01 0.0 0.5 1.0 1.5 2.0 2.5 Fault Current (A) TS250 A= TSV250-184F B = TSV250-130F/TSL250-130F/ TSM250-130F (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 C = TS250-130F D = TSL250-080F 3.0 Time-to-Trip (s) Time-to-Trip (s) 10 1000 A 10 1 A B 0.1 0.01 0 1 2 3 4 Fault Current (A) TS600/TSM600 A= TS600-400/TSM600-400F B= TSM600-250F/TS600-170F/200F 5 6 7 PolySwitch(R) Resettable PPTCs Telecom > Surface Mount > TS Series Temperature Rerating Maximum Ambient Temperature Part Number** -40C -20C 0C 20C 40C 50C 60C 70C 85C Hold Current (A) TS250/TSL250/TSM250/TSV250 - Surface-mount*-- 250VAC TSL250-080F 0.124 0.110 0.095 0.080 0.066 0.059 0.051 0.044 0.033 TSL250-130F 0.208 0.182 0.156 0.130 0.104 0.091 0.078 0.065 0.045 TS250-130F 0.208 0.182 0.156 0.130 0.104 0.091 0.078 0.065 0.045 TSM250-130F 0.208 0.182 0.156 0.130 0.104 0.091 0.078 0.065 0.045 TSM250-130F-RA 0.208 0.182 0.156 0.130 0.104 0.091 0.078 0.065 0.045 TSV250-130F 0.208 0.182 0.156 0.130 0.104 0.091 0.078 0.065 0.045 TSV250-184F 0.286 0.252 0.218 0.184 0.150 0.134 0.118 0.102 0.075 TS600 - Surface-mount-- 600VAC (Single Channel) TS600-170F 0.264 0.230 0.200 0.170 0.140 0.125 0.109 0.094 0.070 TS600-200F 0.310 0.275 0.238 0.200 0.165 0.147 0.128 0.110 0.083 TS600-400F 0.640 0.560 0.480 0.400 0.320 0.270 0.230 0.190 0.130 TSM600 - Surface-mount -- 600VAC (Dual Channel) TSM600-250F 0.400 0.350 0.300 0.250 0.198 0.170 0.140 0.117 0.083 TSM600-400F 0.640 0.560 0.480 0.400 0.320 0.270 0.230 0.190 0.130 * 250VAC interrupt products may help equipment pass ITU K.20, K.21 and K.45 recommendations and Telcordia GR-1089 Port Type 2 and 4 requirements. 600VAC interrupt products may help equipment pass UL60950, TIA-968-A and GR1089 Port Type 1, 3 and 5 requirements. ** Applies to all products which share the same prefix. TSx250/TS600/TSM600 - Temperature Rerating Curve % of Rated Hold and Trip Current 200 150 100 50 0 -40 -20 0 20 40 60 80 Device's Ambient Temperature (C) (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 PolySwitch(R) Resettable PTCs Telecom > Surface Mount > TS Series TS250/TSV250/TSM250/TSL250 - Physical Specifications Terminal Material Soldering Characteristics Tin-plated Brass, Nickel Under-plating (TS250/TSV250/TSL250) Tin-plated Copper (TSM250) IEC 60068-2-58 Note: Devices are not intended to be placed through a reflow process. TS250/TSV250/TSM250/TSL250 - Environmental Specifications Test Passive Aging Conditions 60C, 1000 hrs 85C, 1000 hrs Humidity Aging 85C, 85% R.H., 500 hrs Thermal Shock 125C, -55C (10 Times) Solvent Resistance MIL-STD-202, Method 215F Moisture Resistance Level Level 1, J-STD-020 Storage Conditions 40C max, 70% RH max; devices should remain in original sealed bags prior to use. Devices may not meet specified values if these storage conditions are exceeded. TS600 - Physical Specifications Terminal Material Tin-plated Brass Insulating Material Nylon Resin (UL94V-0), 1000V Dielectric Rating Soldering Characteristics ANSI/J-STD-002, Category 3 Solder Heat Withstand IEC 60068-2-58, Test Tb, Section 8 TS600 - Environmental Specifications Test Passive Aging Conditions 60C, 1000 hrs 85C, 1000 hrs Humidity Aging 85C, 85% R.H., 1000 hrs Thermal Shock 125C, -55C (10 Times) Solvent Resistance MIL-STD-202, Method 215F Moisture Resistance Level Level 1, J-STD-020 Storage Conditions 40C max, 70% RH max; devices should remain in original sealed bags prior to use. Devices may not meet specified values if these storage conditions are exceeded. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 PolySwitch(R) Resettable PPTCs Telecom > Surface Mount > TS Series TSM600 - Physical Specifications Terminal Material Tin-plated Brass Insulating Material Nylon Resin (UL94V-0), 1000V Dielectric Rating Soldering Characteristics IEC 60068-2-58, Method 7 Solder Heat Withstand IEC 60068-2-58, Test Tb, Section 5 Method 1a TSM600 - Environmental Specifications Test Passive Aging Conditions 60C, 1000 hrs 85C, 1000 hrs Humidity Aging 85C, 85% R.H., 1000 hrs Thermal Shock 125C, -55C (10 Times) Solvent Resistance MIL-STD-202, Method 215J Moisture Resistance Level Level 2A, J-STD-020 Storage Conditions 40C max, 70% RH max; devices should remain in original sealed bags prior to use. Devices may not meet specified values if these storage conditions are exceeded. Solder Reflow Recommendations Profile Feature Average ramp up rate (TsMAX to Tp) Pb-Free Assembly tp Tp 3C/s max TL * Temperature min (TsMIN) 150C * Temperature max (TsMAX) 200C * Time (tsMIN to tsMAX) 60-180 s Temperature Preheat tL TsMAX TsMIN ts Preheat 25 Time maintained above: Critical Zone TL to Tp Ramp Up Reflow Profile Ramp Down t 25C to Peak Time * Temperature (TL) 217C * Time (tL) 60-150 s Solder Reflow Peak/Classification temperature (Tp) 260C * Recommended reflow method: IR, vapor phase oven, hot air oven. Time within 5C of actual peak temperature Time (tp) 20-40 s Ramp down rate 6C/s max Time 25C to peak temperature 8min max Note: All temperatures refer to topside of the package, measured on the package body surface. * Surface-mount devices are not intended to be wave soldered to the bottom side of the board. * Recommended maximum paste thickness of 0.25mm (0.010in). * Devices can be cleaned using standard industry methods and solvents. Rework * If a device is removed from the board, it should be discarded and replaced with a new device. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 D E A PolySwitch(R) Resettable PTCs Telecom > Surface Mount > TS Series A C Dimension Figures C C C D A F B C C C D B E A D B C D E D D A GD A E D A C B C C B D B B E F E D D DA E F E E B B A E D B D C B F C F B D E A F B C A D A B E D D A D A E E E E A Figure 1 Figure 2 Figure 3 C C C D E A B D C C C C A F F C F D F B E E Dimensions Aand Weights EA D B B B Figure 5 D D A A DE E E D E G A D G E E G D Dimensions in Millimeters (Inches) A Min E G C D A Part Number E D A D Figure 4 F F B B E F B B F B Max Min C Max Min D Max Min Figure Device Mass (g) (Only for Reference) 3 2.80 3 2.80 -- 1 3.60 -- -- 5 0.64 C C 1.90 (0.08) 1.60 (0.07) 2.30 (0.09) 2 2.80 1.90 (0.08) 1.60 (0.07) 2.30 (0.09) 2 2.80 E Max Min F Max Min Max TS250/TSL250/TSM250/TSV250 - Surface-mount*-- 250VAC TSL250-080F TSL250-130F TS250-130F 6.7 (0.27) 7.9 (0.31) 2.7 (0.11) 3.7 (0.15) 4.8 (0.19) 5.3 (0.21) 0.2 (0.01) 0.4 (0.02) 2.5 (0.10) 3.1 (0.12) 6.7 (0.27) 7.9 (0.31) 2.7 (0.11) 3.7 (0.15) 4.8 (0.19) 5.3 (0.21) 0.2 (0.01) 0.4 (0.02) 2.5 (0.10) D 3.1 (0.12) 8.5 (0.34) 9.4 (0.37) -- 3.4 (0.14) -- 7.4 (0.29) 9.0 7.8 8.6 (0.354) (0.307) (0.339) D 3.8 (0.15) -- E 8.9 (0.35) -- TSV250-130F -- 6.10 (0.24) -- 6.90 (0.27) -- 3.20 (0.13) A A D 0.56 A (0.02) -- -- TSV250-184F -- 6.10 (0.24) -- 6.90 (0.27) -- 3.20 (0.13) 0.56 (0.02) -- -- -- D 3.9 (0.154) E 8.2 (0.323) TSM250-130F -- -- -- A 0.3 (0.01) -- E -- B 0.7 (0.026) -- C B E -- B C B TS600 - Surface-mount-- 600VAC (Single Channel) TS600-170F 18.3 (0.72) 19.4 (0.77) 11.6 (0.46) 12.3 (0.49) 7.2 (0.29) 8.3 (0.33) 1.7 (0.07) 2.4 (0.10) 9.9 (0.39) 10.4 (0.41) 1.5 (0.06) 2.3 (0.09) 4 23.6 TS600-200F 18.3 (0.72) 19.4 (0.77) 11.6 (0.46) 12.3 (0.49) 7.2 (0.29) 8.3 (0.33) 1.7 (0.07) 2.4 (0.10) 9.9 (0.39) 10.4 (0.41) 1.5 (0.06) 2.3 (0.09) 4 23.6 TS600-400F 18.3 (0.72) 19.4 (0.77) 11.6 (0.46) 12.3 (0.49) 7.2 (0.29) 8.3 (0.33) 1.7 (0.07) 2.4 (0.10) 9.9 (0.39) 10.4 (0.41) 1.5 (0.06) 2.3 (0.09) 4 19.8 600VAC interrupt products may help equipment pass UL60950, TIA-968-A and GR1089 Port Type 1, 3 and 5 requirements. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 B E (R) D D PolySwitch Resettable PPTCs A F B Telecom > Surface Mount > TS Series E A E Dimension Figures C C B F F D E D E A E D G Figure 6 A Dimensions and Weights Dimensions in Millimeters (Inches) Figure Device Mass (g) (Only for Reference) 17.0 17.60 11.20 11.70 10.40 11.20 4.80 5.20 2.50 2.80 0.60 1.0 2.2 3.1 TSM600-250F (0.67) (0.69) (0.44) (0.46) (0.41) (0.44) (0.19) (0.20) (0.10) (0.11) (0.02) (0.04) (0.09) (0.12) 6 31.2 17.0 17.60 11.20 11.70 10.40 11.20 4.80 5.20 2.50 2.80 0.60 1.0 2.2 3.1 B (0.67) (0.69) (0.44) (0.46) (0.41) (0.44) (0.19) (0.20) (0.10) (0.11) (0.02) (0.04) (0.09) (0.12) 6 31.2 Part Number A Min B Max Min C Max Min D Max Min E Max Min F Max Min G Max Min Max TSM600 - Surface-mount -- 600VAC (Dual Channel) TSM600-400F E 600VAC interrupt products may help equipment pass UL60950, TIA-968-A and GR1089 Port Type 1, 3 and 5 requirements. D A C Packaging and Marking Information Part Number Bag Quantity Tape and Reel Quantity Standard Package Quantity Part Marking Agency Approvals TS250/TSL250/TSM250/TSV250 - Surface-mount -- 250VAC TSL250-080F-2 -- 1,500 7,500 T08 UL, CSA,TUV TSL250-130F-2 -- 1,500 7,500 T13 -- TS250-130F-2 -- 1,500 7,500 T13 UL, CSA, TUV TSM250-130F-2 -- 600 3,000 T13M UL TSM250-130F-RA-2 -- 600 3,000 T13M UL 2500 -- 10,000 T13V UL, CSA, TUV -- 1,200 6,000 T13V UL, CSA, TUV 2500 -- 10,000 T18V UL TSV250-130F TSV250-130F-2 TSV250-184F TS600 - Surface-mount -- 600VAC (Single Channel) TS600-170F-2 -- 300 900 T20 UL, CSA TS600-200F-RA-2 -- 300 900 T20 UL, CSA TS600-400F-2 -- 300 900 T40 UL, CSA TSM600 - Surface-mount -- 600VAC (Dual Channel) TSM600-250F-2 -- 200 600 TSM600 UL, CSA TSM600-250F-RA-2 -- 200 600 TSM600 UL, CSA TSM600-400F-2 -- 200 600 TSM600-4 UL (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 PolySwitch(R) Resettable PTCs Telecom > Surface Mount > TS Series B A A A A A D A A B B B C C B C B B B B B B C B B C C D D A A E G B A A B F B E C C D A D D B C CD A A Figure 2 B A A B D D C Figure 1 A A B D Figure 3 B E E F F C F C C Figure 4 Recommended Pad Layouts in millimeters (inches) Nominal D Device A B E F A B C D E F G Figure TS250 (All) 4.6 (0.180) 1.80 (0.070) 6.10 (0.240) -- -- -- -- 1 TSM250 (All) 3.20 (0.126) 2.00 (0.079) 6.70 (0.264) 8.20 (0.323) 2.60 (0.102) 3.90 (0.154) -- 4 TSV250 (All) 2.29 (0.090) 2.41 (0.095) 6.35 (0.250) 3.43 (0.135) -- -- -- 2 TSL250 (All) 3.6 (0.140) 1.80 (0.070) 5.50 (0.220) -- -- -- -- 1 TS600 (All) 10.42 (0.410) 3.30 (0.130) 3.35 (0.132) -- -- -- -- 1 TSM600 (All) 5.2 (0.205) 17.80 (0.701) 5.54 (0.218) 6.75 (0.266) 2.08 (0.082) 3.12 (0.123) 8.39 (0.331) 3 C Part Ordering Number System TSx -200 F -RA -B-0.5 -2 Packaging 2 = Tape and Reel (Blank) = Bulk B-x.x = Resistance Matched in Bins of x.x (Optional) Rx = Resistance Range (Optional) aRoHS Compliant, ELV Compliant Hold Current (mA) Product Series (TS250, TSM250, TSV250, TSL250, TS600, TSM600) (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 D PolySwitch(R) Resettable PPTCs Telecom > Surface Mount > TS Series TS250/TSV250/TSM250/TSL250 - Tape and Reel Specifications TS devices are packaged per EIA 481 and EIA 481-2 standards. See Figures 1 and 2 for details. TS250 TSM250 TSV250 TSL250 EIA Mark Dimension (mm) Tolerance (mm) Dimension (mm) Tolerance (mm) Dimension (mm) Tolerance (mm) Dimension (mm) Tolerance (mm) Carrier Tape Width W 16 0.30 24.0 0.50 16.0 0.30 16 0.30 Sprocket Hole Pitch P0 4.0 0.10 4.0 0.10 4.0 0.10 4.0 0.10 P1 12.0 0.10 16.0 0.10 8.0 0.10 8.0 0.10 P2 2.0 0.10 2.0 0.10 2.0 0.10 2.0 0.10 A0 6.9 0.23 7.05 0.20 5.5 0.10 5.5 0.10 B0 9.6 0.15 8.85 0.20 6.2 0.10 7.9 0.10 B1 max 12.1 -- 12.45 -- 8.0 -- 9.2 -- D0 1.5 -0/+0.1 1.5 -0/+1.0 1.55 0.05 1.55 0.05 F 7.5 0.10 11.5 0.10 7.5 0.10 7.5 0.10 E1 1.75 0.10 1.75 0.10 1.75 0.10 1.75 0.10 E2 min 14.25 -- 22.25 -- -- -- -- -- Tape Thickness T max 0.4 -- 0.5 0.50 0.45 -- 0.35 -- Tape Thickness with Splice Cover Tape Thickness T1 max 0.1 -- 0.1 -- 0.1 -- 0.1 -- K0 3.4 0.15 8.55 0.20 7.0 0.10 3.70 0.10 Leader min 300 -- 300 -- 390 -- 390 -- Trailer min 300 -- 160 -- 160 -- 160 -- Reel Diameter A max 340 -- 390 -- 340 -- 340 -- Core Diameter N min 50 -- 75 -- 50 -- 50 -- W1 16.4 -0/+2.0 25.4 0.5 16.4 -0/+2.0 16.4 -0/+2.0 W2 max 22.4 -- 30.4 -- 22.4 -- 22.4 -- Description Sprocket Hole Diameter Reel Dimensions Space between Flanges-less Device Reel Width (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 PolySwitch(R) Resettable PTCs Telecom > Surface Mount > TS Series TS600/TSM600 - Tape and Reel Specifications TS devices are packaged per EIA 481 and EIA 481-2 standards. See Figures 1 and 2 for details. TS600 TSM600 EIA Mark Dimension (mm) Tolerance (mm) Dimension (mm) Tolerance (mm) Carrier Tape Width W 32 0.3 32 0.3 Sprocket Hole Pitch P0 4.0 0.1 4.0 0.1 P1 16 0.1 24 0.1 P2 2.0 0.1 2.0 0.1 A0 10 0.1 11.2 0.1 B0 19.2 0.1 17.8 0.1 B1 max 21.6 -- 23.45 -- D0 1.5 -0/+1.0 1.5 -0/+1.0 F 14.2 0.1 14.2 0.1 E1 1.75 0.1 1.74 0.1 E2 min 28.4 0.1 28.4 0.1 Tape Thickness T max 0.50 0.5 0.5 0.5 Tape Thickness with Splice T1 max 0.1 -- 0.1 -- K0 13.2 0.1 11.9 0.1 Leader min 390 -- 390 -- Trailer min 160 -- 160 -- Reel Diameter A max 360 -- 360 -- Core Diameter N min 50 -- 50 -- W1 32.4 -0/+2.0 32.4 -0/+2.0 W2 max 40 -- 40 -- Description Sprocket Hole Diameter Reel Dimensions Space between Flanges-less Device Reel Width (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19 PolySwitch(R) Resettable PPTCs Telecom > Surface Mount > TS Series Tape and Reel Diagrams P0 D0 T Embossment P2 E1 Cover Tape A0 B1 F K0 B0 T1 W E2 P1 Center Lines of Cavity Figure 1 W2 (Measured at Hub) Cover Tape A N (Hub Dia.) W1 (Measured at Hub) Carrier Tape Embossed Cavity Figure 2 WARNING * Users should independently evaluate the suitability of and test each product selected for their own application. * Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and flame. * These devices are intended for protection against damage caused by occasional overcurrent or overtemperature fault conditions and should not be used when repeated fault conditions or prolonged trip events are anticipated. * Contamination of the PPTC material with certain silicone-based oils or some aggressive solvents can adversely impact the performance of the devices. * Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal, and mechanical procedures for electronic components. * PPTC devices are not recommended for installation in applications where the device is constrained such that its PTC properties are inhibited, for example in rigid potting materials or in rigid housings, which lack adequate clearance to accommodate device expansion. * Operation in circuits with a large inductance can generate a circuit voltage (Ldi/dt) above the rated voltage of the device. Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics. (c) 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 08/02/19