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 (EUR) 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 .3A 60VDC 10A 2920 AEC-Q200
Datasheet
5 751In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

ASMDC PCB Mount SMD/SMT 300 mA 60 VDC 600 mA 10 A 3.4 Ohms - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .5A 60VDC 10A 2920 AEC-Q200
Datasheet
8 217In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

ASMDC SMD/SMT SMD/SMT 500 mA 60 VDC 1 A 10 A 1.2 Ohms 2920 (7450 metric) - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.25A 33VDC 40A 2920 AEC-Q200
Datasheet
5 914In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

ASMDC PCB Mount SMD/SMT 1.25 A 33 VDC 2.5 A 40 A 250 mOhms - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.85A 33VDC 40A 2920 AEC-Q200
Datasheet
10 205In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

ASMDC SMD/SMT SMD/SMT 1.85 A 33 VDC 3.7 A 40 A 150 mOhms 2920 (7450 metric) - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 3A 24VDC 40A 2920 AEC-Q200
Datasheet
6 068In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

ASMDC PCB Mount SMD/SMT 3 A 24 VDC 6 A 40 A 72 mOhms - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .55A 60V 10A Imax
Datasheet
5 529In Stock
6 000Expected 27/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1 000

decaSMD SMD/SMT SMD/SMT 550 mA 60 VDC 1.1 A 10 A 1.1 Ohms 2018 (5045 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 15V 50MA-HD 40A MAX
Datasheet
9 656In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

femtoSMD PCB Mount SMD/SMT 50 mA 15 VDC 150 mA 40 A 30 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 14 Ohms 40 A 12 VDC - 40 C+ 85 C
Datasheet
5 269In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

femtoSMD + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V 100MA-HD 40A 0603
Datasheet
5 793In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

femtoSMD PCB Mount SMD/SMT 100 mA 12 VDC 250 mA 40 A 8 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 9V 160MA-HD 40A MAX
Datasheet
5 630In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 5 000

femtoSMD SMD/SMT SMD/SMT 160 mA 9 VDC 400 mA 40 A 4.2 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .05A 30V Micro SMD AEC-Q200
Datasheet
6 598In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

microASMD SMD/SMT SMD/SMT 50 mA 30 VDC 150 mA 10 A 50 Ohms 1210 (3225 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .05A 30V 10A IMAX
Datasheet
23 169In Stock
36 000Expected 30/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

microSMD SMD/SMT SMD/SMT 50 mA 30 VDC 150 mA 10 A 50 Ohms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .35A 6V 40A Imax
Datasheet
8 244In Stock
8 000Expected 02/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

microSMD SMD/SMT SMD/SMT 350 mA 6 VDC 750 mA 40 A 1.3 Ohms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .5A 13.2V 40A Imax
Datasheet
6 592In Stock
6 970Expected 31/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

microSMD SMD/SMT SMD/SMT 500 mA 13.2 VDC 1 A 40 A 900 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .75A 6V 40A Imax
Datasheet
7 626In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4 000

microSMD PCB Mount SMD/SMT 750 mA 6 VDC 1.5 A 40 A 400 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .3A 30V Mini SMD AEC-Q200
Datasheet
7 563In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2 000

miniASMD SMD/SMT SMD/SMT 300 mA 30 VDC 600 mA 40 A 1.75 Ohms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 40A 12.7Ohms
Datasheet
18 941In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2 000

miniSMD SMD/SMT SMD/SMT 100 mA 60 VDC 300 mA 40 A 12.7 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .2A 30V 10A Imax
Datasheet
28 921In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2 000

miniSMD SMD/SMT SMD/SMT 200 mA 30 VDC 400 mA 10 A 3.3 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30V 40A 1.75Ohms
Datasheet
30 174In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2 000

miniSMD SMD/SMT SMD/SMT 300 mA 30 VDC 600 mA 40 A 1.75 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .50A 24V 100A Imax
Datasheet
58 638In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2 000

miniSMD SMD/SMT SMD/SMT 500 mA 24 VDC 1 A 100 A 1 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .75A 13.2V 100A Imax
Datasheet
12 194In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2 000

miniSMD SMD/SMT SMD/SMT 750 mA 13.2 VDC 1.5 A 100 A 450 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 33V 750MA-HD 100A MAX
Datasheet
7 410In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1 500

miniSMD SMD/SMT SMD/SMT 750 mA 33 VDC 1.6 A 100 A 390 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 24V 1.1A-HD 40A MAX
Datasheet
18 973In Stock
33 000Expected 30/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1 500

miniSMD SMD/SMT SMD/SMT 1.1 A 24 VDC 2.2 A 20 A 180 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 16V 100A 0.11Ohms
Datasheet
7 771In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2 000

miniSMD SMD/SMT SMD/SMT 1.5 A 16 VDC 2.8 A 100 A 110 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 16Vdc 100A MINI-SMD
Datasheet
11 364In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1 500

miniSMD SMD/SMT SMD/SMT 2.6 A 16 VDC 5 A 100 A 50 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel