TRF250-180-0.125

PolySwitch® Resettable PPTCs Telecom > Radial Leaded > TR Series TR Series RoHS Description Our PolySwitch families of telecommunications and networking devices help meet the growing demand for resettable overcurrent protection. These product families help provide protection against damage caused by power cross and power induction surges as defined in ITU, Telcordia GR1089 and IEC 62368-1. Our offering includes chip, surface-mount and radial-leaded configurations. Applications Networking Machines and Systems Features • Resettable overcurrent protection • Fast time-to-trip • Resistance sorted and matched devices available • Analog and digital line cards • Phone sets • xDSL modems and splitters • Fax machines • Powered Ethernet systems • Phone wall outlets • VoIP (Voice over Internet Protocol) equipment • Alarm systems • Low parasitic capacitance/flat impedance with frequency • LAN, WAN equipment • PBX systems • Recognized to UL 1434, approved to CSA TIL No. CA-3A and EN 60730-1. • Customer premise equipment • MDF modules • Access network hardware • T1/E1 equipment Agency Approvals AGENCY • Modems 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 (A) (s) RMIN RMAX R1MAX (Ω) (Ω) (Ω) Agency Approvals TRF250 – Radial-leaded*— 250VAC TRF250-055T 0.055 0.170 60 250 3.0 0.6 0.28 3.5 15.0 25.0 35.0 — — — TRF250-055UT 0.055 0.170 60 250 3.0 0.6 0.28 3.0 15.0 25.0 35.0 — — — TRF250-080T 0.080 0.160 60 250 3.0 0.6 0.35 4.0 15.0 22.0 33.0 x x x TRF250-080U 0.080 0.160 60 250 3.0 0.6 0.35 2.5 14.0 20.0 33.0 x x x TRF250-110U 0.110 0.220 60 250 3.0 0.6 1.00 0.8 5.0 9.0 16.0 x x x TRF250-120 0.120 0.240 60 250 3.0 0.8 1.00 1.5 4.0 8.0 16.0 x x x TRF250-120T 0.120 0.240 60 250 3.0 0.8 1.00 0.7 7.0 12.0 16.0 — — — © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 PolySwitch® Resettable PTCs Telecom > Radial Leaded > TR Series Electrical Characteristics Part Number VMAX IMAX IH IT Operating Interrupt Interrupt (A) (A) (VDC) (VRMS) RMIN RMAX R1MAX (s) (Ω) (Ω) (Ω) TRF250-120T-RA 0.120 0.240 60 250 3.0 0.8 1.00 1.2 7.0 9.0 16.0 — — — TRF250-120T-RC 0.130 0.260 60 250 3.0 0.8 1.00 3.0 5.4 7.5 14.0 — — — TRF250-120T-RF 0.120 0.240 60 250 TRF250-120T-RH 0.120 0.240 60 250 3.0 0.8 1.00 0.9 6.0 10.5 16.0 — — — 3.0 0.8 1.00 0.7 9.0 11.0 16.0 — — — TRF250-120T-R1 0.120 0.240 60 TRF250-120T-R2 0.120 0.240 60 250 3.0 0.8 1.00 0.7 6.0 9.0 16.0 — — — 250 3.0 0.8 1.00 0.8 8.0 10.5 16.0 — — — TRF250-120U 0.120 0.240 60 250 3.0 0.7 1.00 1.0 6.0 10.0 16.0 x x x TRF250-120UT 0.120 TRF250-145 0.145 0.240 60 250 3.0 0.7 1.00 0.7 7.0 12.0 16.0 — — — 0.290 60 250 3.0 0.8 1.00 2.5 3.0 6.0 14.0 x x x TRF250-145-RA TRF250-145T 0.145 0.290 60 250 3.0 0.8 1.00 2.5 3.0 6.0 12.0 — — — 0.145 0.290 60 250 3.0 0.8 1.00 1.5 5.4 7.5 14.0 — — — TRF250-145U 0.145 0.290 60 250 3.0 0.7 1.00 2.0 3.5 6.5 14.0 x x x TRF250-180 0.180 0.650 100 250 10.0 0.9 3.00 0.5 0.8 2.2 4.0 x x x 0.183 0.685 100 250 10.0 0.9 3.00 0.6 0.8 2.0 3.4 x x x TRF250-183U 0.183 0.685 100 250 10.0 0.9 3.00 0.6 0.8 2.0 3.4 x x x TRF250-184‡ 0.184 1.000 100 250 10.0 0.9 3.00 0.5 1.2 2.4 3.1 x x x (A) PD Typ Max Time-to-trip (W) (A) Agency Approvals TRF250 – Radial-leaded*— 250VAC ‡ TRF250-183 ‡ † TRF600 – Radial-leaded — 600VAC TRF600-150 0.150 0.300 250 600 3.0 1.4 1.0 1.4 6.0 10.0 17.0 x x x TRF600-150-RB 0.150 0.300 250 600 3.0 1.4 1.0 1.0 9.0 12.0 22.0 — — — TRF600-150-R2 0.150 0.300 250 600 3.0 1.4 1.0 1.3 7.0 10.0 17.0 — — — TR600-150F-EX 0.150 0.300 250 600 3.0 1.4 1.0 5.0 6.0 12.0 22.0 — — — TR600-150F-EX-RB 0.150 0.300 250 600 3.0 1.4 1.0 5.0 9.0 12.0 22.0 — — — TRF600-160 0.160 0.320 250 600 3.0 1.7 1.0 7.5 4.0 10.0 18.0 x x x TRF600-160-RA 0.160 0.320 250 600 3.0 1.7 1.0 9.5 4.0 7.0 16.0 — — — TRF600-250 0.250 0.850 250 600 3.0 2.0 3.0 1.0 1.0 4.3 7.0 x x x TRF600-400 0.400 1.000 60 600 3.0 2.4 3.0 4.0 0.95 1.45 1.90 x x x Notes: IH : Hold current: maximum current device will pass without interruption in 20°C still air. IT : Trip current: minimum current that will switch the device from low resistance to high resistance in 20°C 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 20°C still air. RMIN : Minimum resistance of device as supplied at 20°C unless otherwise specified. RMAX : Maximum resistance of device as supplied at 20°C unless otherwise specified. R1MAX : Maximum resistance measured one hour post-trip or post-reflow at 20°C. * 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. ‡ Product is not currently available in a resistance matched or sorted option. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 PolySwitch® Resettable PPTCs Telecom > Radial Leaded > TR Series Temperature Rerating Maximum Ambient Temperature Part Number -40°C -20°C 0°C 20°C 40°C 50°C 60°C 70°C 85°C Hold Current (A) TRF250 – Radial-leaded — 250VAC TRF250-055T 0.085 0.076 0.065 0.055 0.045 0.041 0.035 0.030 0.023 TRF250-055UT 0.085 0.076 0.065 0.055 0.045 0.041 0.035 0.030 0.023 TRF250-080T 0.124 0.110 0.095 0.080 0.066 0.059 0.051 0.044 0.033 TRF250-080U 0.124 0.110 0.095 0.080 0.066 0.059 0.051 0.044 0.033 TRF250-110U 0.171 0.151 0.131 0.110 0.091 0.081 0.071 0.061 0.046 TRF250-120 0.186 0.165 0.143 0.120 0.099 0.088 0.077 0.066 0.050 TRF250-120T 0.186 0.165 0.143 0.120 0.099 0.088 0.077 0.066 0.050 TRF250-120U 0.186 0.165 0.143 0.120 0.099 0.088 0.077 0.066 0.050 TRF250-120UT 0.186 0.165 0.143 0.120 0.099 0.088 0.077 0.066 0.050 TRF250-145 0.225 0.199 0.172 0.145 0.119 0.106 0.093 0.080 0.060 TRF250-145T 0.225 0.199 0.172 0.145 0.119 0.106 0.093 0.080 0.060 TRF250-145U 0.225 0.199 0.172 0.145 0.119 0.106 0.093 0.080 0.060 TRF250-180 0.279 0.247 0.213 0.180 0.147 0.131 0.115 0.099 0.074 TRF250-183‡ 0.284 0.251 0.217 0.183 0.149 0.133 0.117 0.101 0.075 TRF250-183U‡ 0.284 0.251 0.217 0.183 0.149 0.133 0.117 0.101 0.075 TRF250-184‡ 0.286 0.252 0.218 0.184 0.150 0.134 0.118 0.102 0.075 TRF600 – Radial-leaded†— 600VAC TRF600-150 0.239 0.209 0.180 0.150 0.121 0.107 0.093 0.079 0.057 TR600-150F-EX 0.239 0.209 0.180 0.150 0.121 0.107 0.093 0.079 0.057 TRF600-160 0.255 0.223 0.192 0.160 0.129 0.114 0.099 0.084 0.061 TRF600-250 0.400 0.350 0.300 0.250 0.198 0.170 0.140 0.117 0.083 TRF600-400 0.640 0.560 0.480 0.400 0.320 0.270 0.230 0.190 0.130 † 600VAC interrupt products may help equipment pass UL60950, TIA-968-A and GR1089 Port Type 1, 3 and 5 requirements. ‡ Product is not currently available in a resistance matched or sorted option. 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) © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 PolySwitch® Resettable PTCs Telecom > Radial Leaded > TR Series Typical Time-to-Trip Curves at 25°C 1000 C B D 100 Time–to–Trip (s) TRF250 A = TRF250-180/183/183U/184 B = TRF250-145/145U/145T C = TRF250-120/120U D = TRF250-110U/120UT/120T E = TRF250-080T/080U F = TRF250-055T/055UT A E F 10 1 A B C D 0.1 E 0.01 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.20 2.40 F 2.60 2.80 3.00 Fault Current (A) 1000 C D 100 Time–to–Trip (s) TRF600 A = TRF600-400 B = TRF600-250 C = TRF600-160 D = TR600-150F-EX E = TRF600-150 B A E 10 1 A B C D E 0.1 0.01 0 1 2 3 4 Fault Current (A) © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 5 6 7 PolySwitch® Resettable PPTCs Telecom > Radial Leaded > TR Series TRF250/ TRF600 – Physical Specifications Lead Material Tin-plated Copper, 22AWG Insulating Material Cured Epoxy Polymer Soldering Characteristics ANSI/J-STD-002, Category 3 Solder Heat Withstand IEC 60068-2-20, Test Tb, Section 5 Method 1 Note: Devices are not intended to be placed through a reflow process. TRF250/ TRF600 – Environmental Specifications Test Passive Aging Conditions 60°C, 1000 hrs 85°C, 1000 hrs Humidity Aging 85°C, 85% R.H., 1000 hrs Thermal Shock 125°C, -55°C (10 Times) Solvent Resistance MIL-STD-202, Method 215F Moisture Resistance Level Level 1, J-STD-020 Storage Conditions 40°C 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. Note: Storage conditions: 40°C (max), 70% RH (max), devices should remain in original sealed bag prior to use. Devices may not meet specified values if these storage conditions are exceeded. Part Ordering Number System TRF*250 -120 T -RA -B-0.5 -2 Packaging 2 = Tape and Reel 0.130 = Special Lead Length in Inches (Blank) = Bulk B-x.x = Resistance Matched in Bins of x.xΩ (Optional) Rx = Resistance Range (Optional) Modifier (Optional) U = Uncoated S = Straight Lead T = Fast Trip Device Hold Current (mA) Product Series (TRF250, TRF600) * F = RoHS compliant, ELV compliant © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 C C PolySwitch® Resettable PTCs C C Telecom > Radial Leaded > TR Series F F B B F F D D A E E A A D D Dimension Figures A A A C A C A C A C C A A B B B B D D B B E CL to CL CL to CL CL to CL CL to CL Figure 1 E E CL CLCL to Figure 2 Dimensions and Weights Figure 3 A A A C A D D Figure 4 C C C B E E CL to CL CL to CL CL to B B D D D D E E C C C C B E A A C Dimensions in Millimeters (Inches) C Part Number C A Min B Max Min D C Max D Min D B B Max Min Max Min Max TRF250 – Radial-leaded*— 250VAC B — TRF250-055T B D D A TRF250-055UT A E — 4.7 E — (0.19)C to C 3.8 (0.15) 4.7 (0.19) L L — 5.0‡D (0.20) CL to CL A— 5.0‡ (0.20) E ‡ B D E D D D D —A — — — 0.28 — 4 0.13 — 4.6 (0.18) 4.7 (0.19) — 5.0 (0.20) — — — 1 0.28 TRF250-080U — 4.8 (0.19) — 9.3 (0.37) — 3.8 (0.15) 4.7 (0.19) — 5.0‡ (0.20) — — — 4 0.13 ‡ TRF250-110U — 5.3 (0.21) — 9.4 (0.37) — 3.8 (0.15) 4.7 (0.19) — 5.0 (0.20) — — — 4 0.13 TRF250-120 — 6.5 (0.26) — 11.0 (0.43) — 4.6 (0.18) 4.7 (0.19) — 5.0‡ (0.20) — — — 2 0.38 6.5 (0.26) — 11.0 (0.43) C— 4.6 (0.18) 4.7 (0.19) — 5.0‡ (0.20) — — 7.0 B (0.28) 2 0.38 3 0.19 C — TRF250-120U 6.0 (0.24) — F E A F 6.0 (0.24) D — D — — C 10.0 (0.39) 10.0 (0.39) F 3.8 (0.15) — 3.8 (0.15) — 4.7 (0.19) F — D D D 4.7 A (0.19) — B ‡ 5.0 (0.20) D E A5.0‡ (0.20) ‡ G — E — 6.0 — E (0.24) E G — 6.0 (0.24) 3 0.19 TRF250-145 — 6.5 (0.26) — 11.0 (0.43) — 4.6 (0.18) 4.7 (0.19) — 5.0 (0.20) — — 7.0 (0.28) 2 0.38 TRF250-145T — 6.5 (0.26) — 11.0 (0.43) — 4.6 (0.18) 4.7 (0.19) — 5.0‡ (0.20) — — 7.0 (0.28) 2 0.38 — — 6.0 (0.24) 3 0.19 1 0.35 A — C TRF250-180 C — TRF250-183 — B TRF250-183U TRF250-184 — 6.0 (0.24) — 9.0 (0.35) — — 12.0 (0.47) — A 7.5 B (0.29) — 6.5 (0.26) — 7.7 D (0.30) — 10.0 (0.39) — 10.5 (0.41) — 10.0 (0.39) — 10.5 (0.41) A 3.8 (0.15) 4.7 (0.19) C — 3.8 (0.15) 4.7 (0.19) — C 3.8 (0.15) 4.7 (0.19) 3.0 (0.12) 4.7 (0.19) B — 4.6 (0.18) 4.7 B — — — ‡ 5.0 (0.20) 5.0‡ (0.20) A A C D © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 A C C C — — — 5.0 (0.20) — — — 5.0‡ (0.20) — — — 4 — — — 1 ‡ 5.0 ‡ 1 B (0.19) D (0.20) D D * 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. E E E ‡ Indicates dimension is typical, not minimum. E E E CL to CL CL to CL CL to CL to CL CL to CL CL to CL A E 1 9.9 (0.39) TRF250-145U CL 9.3 (0.37) E 4.6 E (0.18) Max — E A — — B Device Mass (g) C (Only for Reference) 5.8 (0.23) TRF250-120UT A 4.8 E (0.19) F 9.9F (0.39) Min CFigure — C B — F TRF250-080T TRF250-120T B — 5.8 (0.23) B B E B 0.30 0.16 D 0.32 D PolySwitch® Resettable PPTCs Telecom > Radial Leaded > TR Series B B D D E CL Dimension Figures A A C E CL to CL CL to A C C C A B B B B D D E CL to CL E CL to CL CL D E CL to CL Figure 1 Figure 2 Dimensions and Weights A Part Number A C Min C Dimensions in Millimeters (Inches) B Max D Min C Max D B Min Max Min E Max F Min Max A — 9.0 (0.35) — E TR600-150F-EX — 13.5 (0.53) TRF600-160 — TRF600-250 TRF600-400 F 12.5 (0.49) — — 12.6 (0.50) 16.0 (0.63) — — 15.0 (0.59) — 14.8 (0.58) E Device Mass (g) (Only for Reference) Min Max — — E9.0 (0.35) 1 0.37 4.6 (0.18) 4.7 (0.19) — — 6.0 (0.18) 4.7 (0.19) — 5.0 (0.20) — — — 2 0.80 12.6 (0.50) — 6.0 (0.24) 4.7 (0.19) — 5.0‡ (0.20) — — 10.0 (0.39) 2 0.90 — 14.5 (0.57) — 4.6 (0.18) 4.7 (0.19) — 5.0‡ (0.20) — — 10.0 (0.39) 1 0.87 — 13.1 (0.52) — 4.6 (0.18) 6.0 (0.27) — 5.0‡ (0.20) — — — 2 0.85 D 5.0 A (0.20) Figure B TRF600 – Radial-leaded — 600VAC TRF600-150 B C D ‡ Indicates dimension is typical, not minimum. C C B F F D Wave Soldering Recommendations D E E A G D E Recommended Wave Soldering 300 • Soldering temperature profile 250 245˚C ... 260˚C Temperature characteristic at component terminal with dual wave soldering A A C C Rework • If a device is removed from the board, it should be discarded B B and replaced with a new device Temperature (˚C) A 10s 200 150 A 100 C 100˚C ... 130˚C Forced cooling 50 0 B 0 50 100 150 200 250 Time (s) D E to E CL to CL CL D D E CL to CL © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 A C PolySwitch® Resettable PTCs Telecom > Radial Leaded > TR Series Packaging and Marking Information Part Number Bag Quantity Tape and Reel Quantity Standard Package Quantity Part Marking Agency Approvals TRF250 – Radial-leaded — 250VAC TRF250-055T 500 — 10,000 — — TRF250-055UT 500 — 10,000 — — TRF250-080U 500 — 10,000 — UL, CSA, TÜV TRF250-080T 500 — 10,000 08F UL, CSA, TÜV TRF250-110U 500 — 10,000 — UL, CSA, TÜV TRF250-120 500 — 10,000 20F UL, CSA, TÜV TRF250-120-2 — 1,500 7,500 20F UL, CSA, TÜV TRF250-120T 500 — 10,000 20F — — 1,500 7,500 20F — 500 — 10,000 20F UL, CSA, TÜV TRF250-120U-2 — 1,500 7,500 20F UL, CSA, TÜV TRF250-120UT 500 — 10,000 20F — TRF250-145 500 — 10,000 45F UL, CSA, TÜV TRF250-145-2 — 1,500 7,500 45F UL, CSA, TÜV TRF250-145T 500 — 10,000 45F — — 1,500 7,500 45F — 500 — 10,000 45F UL, CSA, TÜV — 1,500 7,500 45F UL, CSA, TÜV 500 — 10,000 80F UL, CSA, TÜV — 1500 7,500 80F UL, CSA, TÜV 500 — 10,000 83F UL, CSA, TÜV TRF250-183-2 — 1,500 7,500 83F UL, CSA, TÜV TRF250-183U 500 — 10,000 — UL, CSA, TÜV TRF250-184 500 — 10,000 84F UL, CSA, TÜV TRF250-120T-2 TRF250-120U TRF250-145T-2 TRF250-145U TRF250-145U-2 TRF250-180 TRF250-180-2 TRF250-183 TRF600 – Radial-leaded — 600VAC TRF600-150 500 — 10,000 150F UL, CSA, TÜV — 1,500 7,500 150F UL, CSA, TÜV 500 — 10,000 150F — — 600 3,000 150F — 500 — 10,000 160F UL, CSA, TÜV — 600 3,000 160F UL, CSA, TÜV TRF600-250 500 — 10,000 250F UL, CSA, TÜV TRF600-400 500 — 10,000 400F UL, CSA, TÜV TRF600-150-2 TR600-150F-EX TR600-150F-EX-2 TRF600-160 TRF600-160-2 © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 PolySwitch® Resettable PPTCs Telecom > Radial Leaded > TR Series Tape and Reel Specifications TRF250/TRF600 devices are available in tape and reel packaging per EIA 468-B standard. See Figures 1 and 2 for details. Description EIA Mark IEC Mark Dimension (mm) Tolerance Carrier Tape Width W W 18 -0.5/+1.0 Hold Down Tape Width W4 W0 5 Min Top Distance between Tape Edges W6 W2 3 Max Sprocket Hole Position W5 W1 9 -0.5/+0.75 Sprocket Hole Diameter D0 D0 4 ±0.2 Abcissa to Plane (Straight Lead) H H 18.5 ±3.0 Abcissa to Plane (Kinked Lead)* H0 H0 16 -0.5/+0.6 Abcissa to Top H1 H1 32.2 Max Overall Width with Lead Protrusion — C1 43.2 Max Overall Width without Lead Protrusion — C2 42.5 Max Lead Protrusion L1 I1 1.0 Max Protrusion of Cut-out L L 11 Max Protrusion beyond Hold Down Tape I2 I2 Not Specified — Sprocket Hole Pitch P0 P0 12.7 ±0.3 Device Pitch (TRF250 and TRF600-150) — — 12.7 — Device Pitch (TRF600-160 - TRF600-400) — — 25.4 — Pitch Tolerance — — 20 Consecutive ±1 Tape Thickness t t 0.9 Max Tape Thickness with Splice* t1 — 2.0 Max Splice Sprocket Hole Alignment — — 0 ±0.3 Body Lateral Deviation Dh Dh 0 ±1.0 Body Tape Plane Deviation Dp Dp 0 ±1.3 Lead Spacing Plane Deviation DP1 P1 0 ±0.7 F F 5.08 ±0.6 w2 w 56 Max a d 370 Max w1 — 4.75 ±3.25 Arbor Hole Diameter c f 26 ±12.0 Core Diameter n h 80 Max Box — — 56/372/372 Max Consecutive Missing Pieces* — — 3 Max — Empty Places per Reel* — — Not Specified — Lead Spacing* Reel Width Reel Diameter Space between Flanges Less Device * Differs from EIA specification. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19 PolySwitch® Resettable PTCs Telecom > Radial Leaded > TR Series Tape and Reel Diagrams h p h p Reference Plane H1 P1 H1 F A L H0 B W4 C2 C1 H W5 W I2 L1 P0 D0 Figure 1 Direction of Unreeling Cross section A-B t Reel Upper Side n Tape a Direction of Unreeling Lower Side c w1 Cross Section w2 Optional Shape: Circular or Polygonal 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. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/04/19