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 computers and consumer electronics against temporary overcurrent faults. Package sizes range 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 (per AECQ200). 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 30V 350MA-HD 20A SMD
Datasheet
7.095In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

nanoASMDCH SMD/SMT SMD/SMT 350 mA 30 VDC 1.75 A 20 A 400 mOhms 1206 (3216 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 16V 1.1A-HD 20A SMD
Datasheet
4.332In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

Automotive SMD SMD/SMT SMD/SMT 1.1 A 16 VDC 3.3 A 20 A 500 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .37A 60V SMD AEC-Q200
Datasheet
3.727In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

ASMD SMD/SMT SMD/SMT 370 mA 60 VDC 980 mA 10 A 1.4 Ohms 2920 (7450 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .9A 30V SMD AEC-Q200
Datasheet
6.925In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

ASMD SMD/SMT SMD/SMT 900 mA 30 VDC 2.16 A 40 A 480 mOhms 2920 (7450 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .75A 33VDC 40A 2920 AEC-Q200
Datasheet
5.033In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

ASMDC PCB Mount SMD/SMT 750 mA 33 VDC 1.5 A 40 A 610 mOhms - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.25A 33VDC 40A 2920 AEC-Q200
Datasheet
6.783In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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
7.818In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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
4.051In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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
8.323In Stock
14.000Expected 12/3/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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 .1A 15VDC 10A 0603 AEC-Q200
Datasheet
3.689In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

femtoASMD PCB Mount SMD/SMT 100 mA 15 VDC 300 mA 10 A 14 Ohms - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .05A 15VDC 10A 0603 AEC-Q200
Datasheet
4.398In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

femtoASMD PCB Mount SMD/SMT 50 mA 15 VDC 150 mA 10 A 30 Ohms - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .08A 12VDC 10A 0603 AEC-Q200
Datasheet
6.806In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

femtoASMD PCB Mount SMD/SMT 80 mA 12 VDC 200 mA 10 A 14 Ohms - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 15V 50MA-HD 40A MAX
Datasheet
11.451In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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
4.378In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

femtoSMD + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V 100MA-HD 40A 0603
Datasheet
6.305In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 .05A 30V 10A IMAX
Datasheet
60.765In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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
7.518In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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
8.178In Stock
24.000Expected 10/27/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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
6.776In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 1.5A 6V 40A Imax
Datasheet
6.874In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

microSMD SMD/SMT SMD/SMT 1.5 A 6 VDC 3 A 40 A 110 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC Polyswitch 4.2A
Datasheet
4.723In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 30Vdc 10A MINI-SMD
Datasheet
5.963In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

microSMD PCB Mount SMD/SMT 100 mA 30 VDC 350 mA 10 A 11 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.5A 12V 100A Imax
Datasheet
40.999In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

miniSMD SMD/SMT SMD/SMT 1.5 A 12 VDC 2.8 A 100 A 110 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 2.6A 12V 100A Imax
Datasheet
42.091In Stock
39.000Expected 10/19/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

miniSMD SMD/SMT SMD/SMT 2.6 A 12 VDC 5 A 100 A 47 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .14A 60V 10A Imax
Datasheet
59.907In Stock
78.000Expected 10/19/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

miniSMD SMD/SMT SMD/SMT 140 mA 60 VDC 280 mA 10 A 6 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel