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 2A 16V High Temp SMD AEC-Q200
Datasheet
930In Stock
1,500Expected 11/05/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

AHS SMD/SMT SMD/SMT 2 A 16 VDC 4 A 70 A 50 mOhms 3425 (8673 metric) - 40 C + 125 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .23A 60V SMD AEC-Q200
Datasheet
2,142In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

ASMD PCB Mount SMD/SMT 230 mA 60 VDC 590 mA 10 A 4.8 Ohms - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .37A 60V SMD AEC-Q200
Datasheet
2,984In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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
3,391In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 1.85A 16V SMD AEC-Q200
Datasheet
1,300In Stock
Min.: 1
Mult.: 1
Reel: 1,500

ASMD SMD/SMT SMD/SMT 1.85 A 16 VDC 3.7 A 40 A 126 mOhms 3425 (8764 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 1.73A 16V SMD AEC-Q200
Datasheet
1,119In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

ASMD SMD/SMT SMD/SMT 1.73 A 16 VDC 3.93 A 40 A 120 mOhms 3425 (8764 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30Vdc 10A MINI-SMD
Datasheet
3,469In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 6Vdc 10A MINI-SMD
Datasheet
Non-Stocked Lead-Time 13 Weeks
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

microSMD PCB Mount SMD/SMT 500 mA 6 VDC 1.5 A 10 A 900 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.1A 24V Mini SMD AEC-Q200
Datasheet
1,800In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

miniASMD SMD/SMT SMD/SMT 1.1 A 24 VDC 2.2 A 20 A 180 mOhms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30Vdc 10A MINI-SMD MINI-SMD
Datasheet
3,658In Stock
12,000Expected 23/02/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

nanoSMD PCB Mount SMD/SMT 100 mA 30 VDC 350 mA 10 A 10 Ohms - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .3A 60V 20A Imax
Datasheet
4,658In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

midSMD SMD/SMT SMD/SMT 300 mA 60 VDC 800 mA 20 A 2.3 Ohms 2018 (5045 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.25A 15V 40A Imax
Datasheet
2,543In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

SMD SMD/SMT SMD/SMT 1.25 A 15 VDC 2.5 A 40 A 250 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.5A 15V 40A Imax
Datasheet
1,993In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

SMD SMD/SMT SMD/SMT 1.5 A 15 VDC 3 A 40 A 250 mOhms 3425 (8764 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.5A 15V 40A Imax
Datasheet
4,000In Stock
8,000Expected 18/05/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

midSMD SMD/SMT SMD/SMT 1.5 A 15 VDC 3 A 40 A 180 mOhms 2018 (5045 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.5A 33V 40A Imax
Datasheet
3,815In Stock
7,500Expected 24/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

SMD SMD/SMT SMD/SMT 1.5 A 33 VDC 3 A 40 A 230 mOhms 3425 (8764 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 230 mOhms 40 A 33 VDC - 40 C+ 85 C
Datasheet
2,514In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

SMD SMD/SMT SMD/SMT 1.5 A 33 VDC 3 A 40 A 230 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 2A 6V 40A Imax
Datasheet
1,204In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

midSMD PCB Mount SMD/SMT 2018 (5050 metric) + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 15V 2.5A-HD 40A SMD
Datasheet
816In Stock
Min.: 1
Mult.: 1
Reel: 2,000

SMD SMD/SMT SMD/SMT 2.5 A 15 VDC 5 A 40 A 85 mOhms 3425 (8764 metric) - 40 C + 85 C Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 2.6A 6V 40A Imax
Datasheet
1,872In Stock
2,000Expected 20/02/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

SMD SMD/SMT SMD/SMT 2.6 A 6 VDC 5.2 A 40 A 75 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 3A 6V 40A Imax
Datasheet
2,198In Stock
4,000Expected 14/05/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

SMD SMD/SMT SMD/SMT 3 A 6 VDC 6 A 40 A 48 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 15V 40A 0.05Ohms
Datasheet
3,450In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

SMD SMD/SMT SMD/SMT 3 A 15 VDC 6 A 40 A 50 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.2A 16V 50A Imax
Datasheet
2,120In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

SMD SMD/SMT SMD/SMT 1.2 A 16 VDC 2.3 A 50 A 340 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.6A 16V 40A Imax
Datasheet
Product Comments
1,685In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

SMD SMD/SMT SMD/SMT 1.6 A 16 VDC 3.2 A 70 A 150 mOhms 3425 (8764 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V 350MA-HD 100A SMD
Datasheet
393In Stock
Min.: 1
Mult.: 1
Reel: 4,000

0805L SMD/SMT SMD/SMT 350 mA 6 VDC 750 mA 100 A 1.2 Ohms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape

Littelfuse Resettable Fuses - PPTC 6V 6.0A-HD 50A SMD
Datasheet
56In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

Low Rho SMD/SMT SMD/SMT 6 A 6 VDC 12 A 50 A 10 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel