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 (GBP) 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 RF5161-000 1210 0.16A 30VDC 0.8W 0.7Ohm
Datasheet
3,840In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

microASMD SMD/SMT SMD/SMT 160 mA 30 VDC 480 mA 20 A 700 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 15V POLYFUSE SURF MOUNT 0603 0.08A
Datasheet
6,375In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0603L SMD/SMT SMD/SMT 80 mA 15 VDC 200 mA 40 A 12 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 63V POLYFUSE SURF MOUNT 0805 0.02A
Datasheet
14,339In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0805L SMD/SMT SMD/SMT 20 mA 63 VDC 60 mA 40 A 70 Ohms 0805 (2012 metric) Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 16V POLYFUSE SURF MOUNT 0805 0.20A
Datasheet
7,211In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0805L SMD/SMT SMD/SMT 200 mA 16 VDC 500 mA 100 A 3.5 Ohms 0805 (2012 metric) Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 24V POLYFUSE SURF MOUNT 0805 0.2A
Datasheet
21,109In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0805L SMD/SMT SMD/SMT 200 mA 24 VDC 500 mA 100 A 3.5 Ohms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 90V POLYFUSE SURF MOUNT 1210 0.05A
Datasheet
7,387In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

1210L PCB Mount SMD/SMT 50 mA 90 VDC 150 mA 10 A 50 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 90V POLYFUSE SURF MOUNT 1210 0.1A
Datasheet
13,720In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

1210L Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 72V POLYFUSE SURF MOUNT 1210 0.20A
Datasheet
9,213In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

1210L SMD/SMT SMD/SMT 200 mA 72 VDC 400 mA 10 A 5 Ohms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 60V POLYFUSE SURF MOUNT 1210 0.35A
Datasheet
9,317In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

1210L SMD/SMT SMD/SMT 350 mA 60 VDC 700 mA 10 A 1.5 Ohms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 60V POLYFUSE SURF MOUNT 2920 1.50A
Datasheet
9,748In Stock
6,000Expected 19/05/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,000

2920L SMD/SMT SMD/SMT 1.5 A 60 VDC 3 A 20 A 250 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 33V 2.6A-HD 40A MAX
Datasheet
24,883In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

2920L SMD/SMT SMD/SMT 2.6 A 33 VDC 5 A 40 A 75 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5030-000
Datasheet
4,420In Stock
3,000Expected 12/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

nanoASMD SMD/SMT SMD/SMT 50 mA 30 VDC 150 mA 20 A 3.5 Ohms 1206 (3216 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V 750MA-HD 40A SMD
Datasheet
3,174In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

Automotive SMD SMD/SMT SMD/SMT 750 mA 12 VDC 2.25 A 40 A 460 mOhms 1206 (3216 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 0402 LoRho SL .100A
Datasheet
11,495In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 10,000

Low Rho SMD/SMT SMD/SMT 100 mA 6 VDC 300 mA 40 A 2 Ohms 0402 (1005 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 24V .035A 0603 PTC
Datasheet
16,118In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0603L PCB Mount SMD/SMT 40 mA 24 VDC 120 mA 20 A 40 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30V 50MA-HD 40A SMD
Datasheet
23,008In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0805L SMD/SMT SMD/SMT 50 mA 30 VDC 150 mA 40 A 20 Ohms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 24V 500MA-HD 100A MAX
Datasheet
25,937In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

1206L SMD/SMT SMD/SMT 500 mA 24 VDC 1 A 100 A 750 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 16V 2.00A 1812 PTC POLY SMT
Datasheet
38,408In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

1812L PCB Mount SMD/SMT 2 A 16 VDC 3.5 A 100 A 70 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 24V 5.0A-HD 50A SMD
Datasheet
15,178In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

Low Rho SMD/SMT SMD/SMT 5 A 24 VDC 10 A 50 A 18 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 6V POLYFUSE SURF MOUNT 1206 SL 7.00A
Datasheet
1,662In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,000

1206L PCB Mount SMD/SMT 7 A 6 VDC 14 A 50 A 7 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 0603 LoRho SL 0.50A
Datasheet
36,983In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

Low Rho SMD/SMT SMD/SMT 500 mA 6 VDC 1 A 50 A 350 mOhms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 24V 7.0A-HD 22A SMD
Datasheet
27,129In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2,500

Low Rho SMD/SMT SMD/SMT 7 A 24 VDC 14 A 50 A 10 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 72V POLYFUSE SURF MOUNT 2920 0.35A
Datasheet
2,493In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

2920L SMD/SMT SMD/SMT 350 mA 72 VDC 700 mA 10 A 4 Ohms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5028-000
Datasheet
2,018In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

nanoASMD SMD/SMT SMD/SMT 200 mA 30 VDC 600 mA 20 A 600 mOhms 1206 (3216 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 16V 1.1A-HD 20A SMD
Datasheet
1,932In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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