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 60V 0.20A 1812 PTC POLY SMT
Datasheet
4,658In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L SMD/SMT SMD/SMT 200 mA 60 VDC 400 mA 40 A 4.4 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30V 1812 .200A POLYFUSE
Datasheet
13,564In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

1812L PCB Mount SMD/SMT 200 mA 30 V 400 mA 100 A 5 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 30V POLY 1812 HALOGEN-FREE .35A
Datasheet
4,685In Stock
4,500Expected 18/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L SMD/SMT SMD/SMT 350 mA 30 VDC 750 mA 40 A 1.7 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 350MA-HD 10A SMD
Datasheet
9,121In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

1812L PCB Mount SMD/SMT 350 mA 60 VDC 700 mA 10 A 1.7 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 30V POLY SURF MOUNT 1812 .500A
Datasheet
31,214In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

1812L SMD/SMT SMD/SMT 500 mA 30 VDC 1 A 100 A 1 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 500MA-HD 100A SMD
Datasheet
26,527In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

1812L PCB Mount SMD/SMT 500 mA 60 VDC 1 A 10 A 1 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel


Littelfuse Resettable Fuses - PPTC 60V 500MA-HD 100A SMD
Datasheet
4,269In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

1812L SMD/SMT SMD/SMT 500 mA 60 VDC 1 A 10 A 1 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1812 15V .5A
Datasheet
7,962In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

1812L SMD/SMT SMD/SMT 500 mA 15 VDC 1 A 100 A 1 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 24V 1812 .750A POLYFUSE
Datasheet
20,746In Stock
13,500Expected 31/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L SMD/SMT SMD/SMT 750 mA 24 VDC 1.5 A 100 A 290 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 33V 1812 .750A POLYFUSE
Datasheet
25,083In Stock
16,000Expected 31/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L PCB Mount SMD/SMT 750 mA 33 VDC 1.5 A 20 A 400 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1812 13.2V 0.75A
Datasheet
7,046In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

1812L 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 PTC 24V POLY 1812 HALOGEN-FREE 1.10A
Datasheet
7,268In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L PCB Mount SMD/SMT 1.1 A 24 VDC 1.95 A 20 A 200 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 33V 1.10A POLY SURF MOUNT
Datasheet
46,302In Stock
49,000On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

1812L PCB Mount SMD/SMT 1.1 A 33 VDC 1.95 A 20 A 200 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1812 8V 1.1A
Datasheet
9,591In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

1812L SMD/SMT SMD/SMT 1.1 A 8 VDC 2.2 A 100 A 210 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 16V POLY 1812 HALOGEN-FREE 1.25A
Datasheet
6,662In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L SMD/SMT SMD/SMT 1.25 A 16 VDC 2.5 A 100 A 140 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 6V 1812 1.25A POLY SURF MOUNT
Datasheet
7,795In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

1812L PCB Mount SMD/SMT 1.25 A 6 VDC 2.5 A 100 A 140 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V 1812 1.50A POLYFUSE
Datasheet
8,244In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L SMD/SMT SMD/SMT 1.5 A 12 VDC 3 A 100 A 110 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 24V 1.5A-HD 40A MAX
Datasheet
22,455In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

1812L PCB Mount SMD/SMT 1.5 A 24 VDC 3 A 20 A 120 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V 1812 PTC POLY SMT
Datasheet
4,564In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L SMD/SMT SMD/SMT 2 A 12 VDC 3.5 A 100 A 70 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 12V POLY SURF MOUNT 1812 2.6A
Datasheet
4,074In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

1812L SMD/SMT SMD/SMT 2.6 A 12 VDC 5 A 100 A 55 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 2016 .300A SURF MOUNT
Datasheet
16,887In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

2016L SMD/SMT SMD/SMT 300 mA 60 VDC 600 mA 20 A 2.3 Ohms 2016 (5041 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 2016 .550A POLYFUSE
Datasheet
12,171In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

2016L SMD/SMT SMD/SMT 550 mA 60 VDC 1.1 A 20 A 1 Ohms 2016 (5041 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 60V POLY 2016 HALOGEN-FREE .750A
Datasheet
11,676In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

2016L SMD/SMT SMD/SMT 750 mA 60 VDC 1.5 A 20 A 900 mOhms 2016 (5041 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 55PTC 33V 2016 1.10A POLYFUSE
Datasheet
15,872In Stock
34,500On Order
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

2016L SMD/SMT SMD/SMT 1.1 A 33 VDC 2.2 A 40 A 400 mOhms 2016 (5041 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 33V 1.5A-HD 40A MAX
Datasheet
33,392In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

2016L SMD/SMT SMD/SMT 1.5 A 33 VDC 3 A 40 A 180 mOhms 2016 (5041 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel