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 computers and consumer electronics against temporary overcurrent faults. Package sizes range 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 (per AECQ200). 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 (CRC) 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 15V 0.05A Ih 30 Ohm
Datasheet
704In Stock
4 000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

femtoSMD SMD/SMT SMD/SMT 50 mA 15 VDC 150 mA 40 A 30 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V 0.08A Ih 14 Ohm
Datasheet
639In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

femtoSMD SMD/SMT SMD/SMT 80 mA 12 VDC 200 mA 40 A 14 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5235-000 2018 0.5A 33VDC 1.5W 0.2Ohm
Datasheet
19 900In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

AHS SMD/SMT SMD/SMT 500 mA 33 VDC 1.5 A 70 A 200 mOhms 2018 (5050 metric) - 40 C + 125 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5236-000 2018 0.8A 33VDC 1.9W 0.1Ohm
Datasheet
19 873In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

AHS SMD/SMT SMD/SMT 800 mA 33 VDC 2 A 70 A 100 mOhms 2018 (5050 metric) - 40 C + 125 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 33V 1.2A-HD 20A 2-SMD
Datasheet
11 057In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2 000

AHS SMD/SMT SMD/SMT 1.2 A 33 VDC 2.3 A 20 A 150 mOhms 2920 (7450 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5237-000 3425 1.6A 24VDC 2.3W 0.035Ohm
Datasheet
7 434In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 500

AHS SMD/SMT SMD/SMT 1.6 A 24 VDC 4.8 A 40 A 35 mOhms 3425 (8673 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5238-000 3425 2A 24VDC 2.3W 0.03Ohm
Datasheet
7 320In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 500

AHS SMD/SMT SMD/SMT 2 A 24 VDC 6 A 40 A 30 mOhms 3425 (8673 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 24V 3.0A-HD 20A 2-SMD
Datasheet
12 940In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 500

AHS SMD/SMT SMD/SMT 3 A 24 VDC 6 A 20 A 15 mOhms 3425 (8673 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5103-000 4 000In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

ASMD Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5160-000 1210 0.1A 30VDC 0.8W 1Ohm
Datasheet
3 833In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

microASMD SMD/SMT SMD/SMT 100 mA 30 VDC 300 mA 20 A 1 Ohms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5161-000 1210 0.16A 30VDC 0.8W 0.7Ohm
Datasheet
3 434In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 RF5163-000 1210 0.35A 30VDC 1.2W 0.4Ohm
Datasheet
3 449In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

microASMD SMD/SMT SMD/SMT 350 mA 30 VDC 1.05 A 20 A 400 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5164-000 1210 0.5A 30VDC 1.5W 0.3Ohm
Datasheet
4 201In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3 000

microASMD SMD/SMT SMD/SMT 500 mA 30 VDC 1.05 A 20 A 300 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5034-000 1210 0.75A 16VDC 1.3W 0.1Ohm
Datasheet
9 811In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

microASMD SMD/SMT SMD/SMT 750 mA 16 VDC 2.25 A 20 A 100 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RF5162-000 1210 0.2A 30VDC 0.8W 0.6Ohm
Datasheet
1 489In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

microASMD SMD/SMT SMD/SMT 200 mA 30 VDC 600 mA 20 A 600 mOhms 1210 (3225 metric) - 40 C + 125 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 63V POLYFUSE SURF MOUNT 0805 0.02A
Datasheet
29 018In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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
10 168In Stock
20 000Expected 8/17/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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
17 554In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 0.1A
Datasheet
4 460In Stock
12 000Expected 8/20/2026
MouseReel Available
Min.: 1
Mult.: 1
: 3 000

1210L Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 72V POLYFUSE SURF MOUNT 1210 0.20A
Datasheet
16 903In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 72V POLYFUSE SURF MOUNT 2920 0.50A
Datasheet
6 905In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1 500

2920L SMD/SMT SMD/SMT 500 mA 72 VDC 1 A 10 A 1.5 Ohms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 60V POLYFUSE SURF MOUNT 2920 1.50A
Datasheet
8 624In Stock
11 000Expected 8/10/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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 6V POLYFUSE 0402 LoRho SL .350A
Datasheet
15 723In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 10 000

Low Rho SMD/SMT SMD/SMT 350 mA 6 VDC 700 mA 40 A 700 mOhms 0402 (1005 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 0603 LoRho SL 0.50A
Datasheet
22 991In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 30V 50MA-HD 40A SMD
Datasheet
13 037In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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