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 1.6A 9V 100A Imax
Datasheet
2.150In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

miniSMD SMD/SMT SMD/SMT 1.6 A 9 VDC 3.2 A 100 A 100 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 2A 8V 100A Imax
Datasheet
589In Stock
6.000Expected 3/25/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

miniSMD SMD/SMT SMD/SMT 2 A 8 VDC 4 A 100 A 70 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 85 mOhms 40 A 16 VDC - 40 C+ 85 C
Datasheet
3.839In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

miniSMD PCB Mount SMD/SMT 2 A 16 VDC 4 A 40 A 85 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 2.6A 6V 100A Imax
Datasheet
3.323In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

miniSMD SMD/SMT SMD/SMT 2.6 A 6 VDC 5 A 100 A 43 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 16Vdc 100A MINI-SMD
Datasheet
4.589In Stock
7.500Expected 2/17/2026
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
Littelfuse Resettable Fuses - PPTC 2.60A 13.2V 100A Imax
Datasheet
943In Stock
3.000Expected 3/24/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

miniSMD SMD/SMT SMD/SMT 2.6 A 13.2 VDC 5 A 100 A 50 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC MINISMDC300F-2
Datasheet
2.000In Stock
Min.: 2.000
Mult.: 2.000
Reel: 2.000

miniSMD PCB Mount SMD/SMT 1812 (4532 metric) + 85 C Reel
Littelfuse Resettable Fuses - PPTC .16A 48V Nano SMD AEC-Q200
Datasheet
387In Stock
3.000Expected 2/17/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

nanoASMDC SMD/SMT SMD/SMT 160 mA 48 VDC 450 mA 10 A 5 Ohms 1206 (3216 metric) - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .35A 16V Nano SMD AEC-Q200
Datasheet
550In Stock
3.000Expected 4/21/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

nanoASMDC SMD/SMT SMD/SMT 350 mA 16 VDC 750 mA 20 A 1.35 Ohms 1206 (3216 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V 100A 0.072Ohms
Datasheet
544In Stock
6.000Expected 2/19/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

nanoSMD SMD/SMT SMD/SMT 2 A 6 VDC 4 A 100 A 72 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .1A 15VDC 20A 0805 AEC-Q200
Datasheet
3.555In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

picoASMD PCB Mount SMD/SMT 100 mA 15 VDC 300 mA 20 A 11 Ohms - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V 100A 0.8Ohms
Datasheet
1.721In Stock
3.000Expected 2/17/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

picoSMD PCB Mount SMD/SMT 500 mA 6 VDC 1 A 100 A 800 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 170 mOhms 40 A 6 VDC - 40 C+ 85 C
Datasheet
179In Stock
6.000Expected 3/18/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

picoSMD PCB Mount SMD/SMT 1.1 A 6 VDC 2.2 A 40 A 170 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC SMDC075F-2
Datasheet
1.685In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

SMDC PCB Mount SMD/SMT 2920 (7351 metric) + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 150 mOhms 40 A 33 VDC - 40 C+ 85 C
Datasheet
3.696In Stock
4.000Expected 4/21/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

SMDC PCB Mount SMD/SMT 2.2 A 33 VDC 4.4 A 40 A 150 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 24V 3.0A-HD 40A MAX
Datasheet
580In Stock
8.000Expected 5/7/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

SMDC PCB Mount SMD/SMT 3 A 24 VDC 6 A 40 A 72 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 3A 16V High Temp SMD AEC-Q200
Datasheet
1.078In Stock
MouseReel Available
Min.: 1
Mult.: 1

AHS SMD/SMT SMD/SMT 3 A 16 VDC 6 A 70 A 24 mOhms 3425 (8673 metric) - 40 C + 125 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 0805 LoRho SL 1.75A
Datasheet
1.187In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

Low Rho SMD/SMT SMD/SMT 1.75 A 6 VDC 3.5 A 50 A 55 mOhms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 1206 LoRho SL 0.75A
Datasheet
254In Stock
4.000Expected 2/17/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

Low Rho SMD/SMT SMD/SMT 750 mA 6 VDC 1.5 A 50 A 180 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 12V 4.0A-HD 50A SMD
Datasheet
1.218In Stock
6.000Expected 3/18/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

Low Rho SMD/SMT SMD/SMT 4 A 12 VDC 8 A 50 A 16 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 1210 LoRho SL 2A
Datasheet
331In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4.000

Low Rho PCB Mount SMD/SMT 2 A 6 VDC 4 A 50 A 24 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 1210 LoRho SL 4A
Datasheet
1.403In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3.000

Low Rho SMD/SMT SMD/SMT 4 A 6 VDC 8 A 50 A 14 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 6V 9.0A-HD 50A SMD
Datasheet
7In Stock
4.000Expected 4/3/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

Low Rho PCB Mount SMD/SMT 9 A 6 VDC 18 A 50 A 5.5 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 1812 LoRho SL 3.00A
Datasheet
121In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.000

Low Rho SMD/SMT SMD/SMT 3 A 6 VDC 7 A 50 A 21 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 250/60V POLYFUSE SMD RA
Datasheet
2.738In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1.500

250S PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 10 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel