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 .55A 60V 10A Imax
Datasheet
5,538In Stock
6,000Expected 13/04/2026
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
9,766In 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 5.8 Ohms 40 A 9 VDC - 40 C+ 85 C
Datasheet
9,682In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 5,000

femtoSMD + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 9V 160MA-HD 40A MAX
Datasheet
5,599In 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
6,750In 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
29,182In Stock
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
8,448In Stock
8,000Expected 12/05/2026
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
8,027In 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
7,573In 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 1.10A 16V 100A Imax
Datasheet
7,109In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

miniSMD PCB Mount SMD/SMT 1812 (4532 metric) + 85 C 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
30,382In 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
52,119In Stock
9,495Expected 17/02/2026
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
12,227In 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 24V 1.1A-HD 40A MAX
Datasheet
37,438In Stock
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
8,441In 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 .2A 24V Nano SMD AEC-Q200
Datasheet
7,588In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

nanoASMDC SMD/SMT SMD/SMT 200 mA 24 VDC 420 mA 100 A 3.1 Ohms 1206 (3216 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .5A 13.2V 100A Imax
Datasheet
28,194In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

nanoSMD SMD/SMT SMD/SMT 500 mA 13.2 VDC 1.1 A 100 A 800 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC NANOSMDC010F-2
Datasheet
18,045In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

nanoSMD SMD/SMT SMD/SMT 100 mA 60 VDC 250 mA 10 A 15 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .12A 48V
Datasheet
19,906In Stock
18,000Expected 13/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

nanoSMD SMD/SMT SMD/SMT 120 mA 48 VDC 390 mA 10 A 6.5 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .16A 48V 10A Imax
Datasheet
19,513In Stock
24,000Expected 21/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

nanoSMD SMD/SMT SMD/SMT 160 mA 48 VDC 450 mA 10 A 5 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel