PolySwitch Surface Mount Resettable PTCs

Littelfuse PolySwitch Surface-Mount (SMD) Resettable PTCs provide overcurrent protection for applications where space is at a premium, and resettable protection is desired. The components are reliable and capable of protecting computer and consumer electronics against temporary overcurrent faults. Package size varies from 0402 to 3425, while the current hold ranges from 50mA to 7.0A. The Littelfuse PolySwitch SMD product family is qualified to strict automotive standards (following the AECQ200 specification). As a result, these PTCs are suitable for protecting Electronic Control Units (ECUs) against damage from faults that would otherwise require costly, complete module replacement.

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Description Datasheet Availability Pricing (IDR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
Mounting Style
Termination Style
Hold Current
Maximum Voltage
Trip Current
Current Rating - Max
Resistance
Package/Case
Minimum Operating Temperature
Maximum Operating Temperature
Qualification
Packaging
Littelfuse Resettable Fuses - PPTC Polyswitch 4.2A
Datasheet
4.963In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

microSMD SMD/SMT SMD/SMT 2 A 6 VDC 5 A 100 A 60 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .75A 24V Mini SMD AEC-Q200
Datasheet
2.809In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

miniASMD SMD/SMT SMD/SMT 750 mA 24 VDC 1.5 A 40 A 290 mOhms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 15V 100mA 11Ohms
Datasheet
4.314In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

picoSMD PCB Mount SMD/SMT 100 mA 15 VDC 300 mA 100 A 11 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 250/60V POLYFUSE SMD RB
Datasheet
2.965In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

250S PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 13 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 50MA-HD 10A SMD
Datasheet
4.086In Stock
Min.: 1
Mult.: 1
Reel: 3.000

1206L PCB Mount SMD/SMT 50 mA 60 VDC 150 mA 10 A 20 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 13.2V 500MA-HD 70A SMD
Datasheet
2.704In Stock
Min.: 1
Mult.: 1
miniASMD SMD/SMT SMD/SMT 500 mA 13.2 VDC 1.1 A 70 A 750 mOhms 1206 (3216 metric) - 40 C + 85 C
Littelfuse Resettable Fuses - PPTC 15V 100A 9Ohms
Datasheet
3.880In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

picoSMD PCB Mount SMD/SMT 120 mA 15 VDC 300 mA 100 A 9 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 1210 LoRho SL 2.6A
Datasheet
1.460In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

Low Rho SMD/SMT SMD/SMT 2.6 A 6 V 5 A 50 A 20 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 2920 LoRho SL 7.0A
Datasheet
926In Stock
2.000Expected 10/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

Low Rho SMD/SMT SMD/SMT 7 A 6 VDC 14 A 50 A 7 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.04A 16V SMD AEC-Q200
Datasheet
3.134In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

ASMD SMD/SMT SMD/SMT 1.04 A 16 VDC 2.46 A 40 A 250 mOhms 2920 (7450 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 15V 0.05A Ih 30 Ohm
Datasheet
1.389In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

femtoSMD SMD/SMT SMD/SMT 50 mA 15 VDC 150 mA 40 A 30 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V 0.08A Ih 14 Ohm
Datasheet
655In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

femtoSMD SMD/SMT SMD/SMT 80 mA 12 VDC 200 mA 40 A 14 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 1210 LoRho SL 3.8A
Datasheet
1.277In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

Low Rho SMD/SMT SMD/SMT 3.8 A 6 VDC 8 A 50 A 16 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5235-000 2018 0.5A 33VDC 1.5W 0.2Ohm
Datasheet
19.945In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

AHS SMD/SMT SMD/SMT 500 mA 33 VDC 1.5 A 70 A 200 mOhms 2018 (5050 metric) - 40 C + 125 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5236-000 2018 0.8A 33VDC 1.9W 0.1Ohm
Datasheet
19.973In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

AHS SMD/SMT SMD/SMT 800 mA 33 VDC 2 A 70 A 100 mOhms 2018 (5050 metric) - 40 C + 125 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5237-000 3425 1.6A 24VDC 2.3W 0.035Ohm
Datasheet
7.479In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

AHS SMD/SMT SMD/SMT 1.6 A 24 VDC 4.8 A 40 A 35 mOhms 3425 (8673 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5238-000 3425 2A 24VDC 2.3W 0.03Ohm
Datasheet
7.327In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

AHS SMD/SMT SMD/SMT 2 A 24 VDC 6 A 40 A 30 mOhms 3425 (8673 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5162-000 1210 0.2A 30VDC 0.8W 0.6Ohm
Datasheet
4.000In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

microASMD SMD/SMT SMD/SMT 200 mA 30 VDC 600 mA 20 A 600 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5163-000 1210 0.35A 30VDC 1.2W 0.4Ohm
Datasheet
3.725In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

microASMD SMD/SMT SMD/SMT 350 mA 30 VDC 1.05 A 20 A 400 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5034-000 1210 0.75A 16VDC 1.3W 0.1Ohm
Datasheet
9.985In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

microASMD SMD/SMT SMD/SMT 750 mA 16 VDC 2.25 A 20 A 100 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V 1.25A-HD 40A SMD
Datasheet
4.345In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

Automotive SMD SMD/SMT SMD/SMT 1.25 A 12 VDC 3.75 A 40 A 300 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 33V 1.2A-HD 20A 2-SMD
Datasheet
13.733In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

AHS SMD/SMT SMD/SMT 1.2 A 33 VDC 2.3 A 20 A 150 mOhms 2920 (7450 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 24V 3.0A-HD 20A 2-SMD
Datasheet
13.769In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

AHS SMD/SMT SMD/SMT 3 A 24 VDC 6 A 20 A 15 mOhms 3425 (8673 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5103-000 4.000In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

ASMD Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5160-000 1210 0.1A 30VDC 0.8W 1Ohm
Datasheet
3.995In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

microASMD SMD/SMT SMD/SMT 100 mA 30 VDC 300 mA 20 A 1 Ohms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel