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 (EUR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
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Termination Style
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Maximum Voltage
Trip Current
Current Rating - Max
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Minimum Operating Temperature
Maximum Operating Temperature
Qualification
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Littelfuse Resettable Fuses - PPTC 30V 40A IMAX
Datasheet
17.121In Stock
44.000Expected 8/20/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

SMD SMD/SMT SMD/SMT 1.1 A 30 VDC 2.2 A 40 A 480 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.1A 33V 40A Imax
Datasheet
4.914In Stock
10.000Expected 10/8/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

SMD SMD/SMT SMD/SMT 1.1 A 33 VDC 2.2 A 40 A 410 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.5A 15V 40A Imax
Datasheet
15.280In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

midSMD SMD/SMT SMD/SMT 1.5 A 15 VDC 3 A 40 A 180 mOhms 2018 (5045 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.5A 33V 40A Imax
Datasheet
9.432In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

SMD SMD/SMT SMD/SMT 1.5 A 33 VDC 3 A 40 A 230 mOhms 3425 (8764 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 230 mOhms 40 A 33 VDC - 40 C+ 85 C
Datasheet
5.838In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

SMD SMD/SMT SMD/SMT 1.5 A 33 VDC 3 A 40 A 230 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.8A 33V 40A Imax
Datasheet
10.364In Stock
30.000Expected 10/21/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

SMD SMD/SMT SMD/SMT 1.85 A 33 VDC 3.6 A 40 A 165 mOhms 3425 (8764 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 2A 15V 40A Imax
Datasheet
6.240In Stock
12.000Expected 8/20/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

SMD SMD/SMT SMD/SMT 2 A 15 VDC 4 A 40 A 125 mOhms 3425 (8764 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 2.5A 15V 40A Imax
Datasheet
9.981In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

SMD SMD/SMT SMD/SMT 2.5 A 15 VDC 5 A 40 A 85 mOhms 3425 (8764 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 3A 6V 40A Imax
Datasheet
6.648In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

SMD SMD/SMT SMD/SMT 3 A 6 VDC 6 A 40 A 48 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC SMDC125F/33-2
Datasheet
6.058In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

SMDC PCB Mount SMD/SMT 1.25 A 33 VDC 2.5 A 40 A 250 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 24V 3.0A-HD 40A MAX
Datasheet
5.728In Stock
16.000Expected 9/23/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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 6V POLYFUSE 0402 LoRho SL .500A
Datasheet
674In Stock
30.000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 10.000

Low Rho SMD/SMT SMD/SMT 500 mA 6 VDC 1 A 40 A 400 mOhms 0402 (1005 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 60V 20MA-HD 40A SMD
Datasheet
225In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

0603L SMD/SMT SMD/SMT 20 mA 60 VDC 60 mA 40 A 70 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 6V POLY 0603 0.5A
Datasheet
47In Stock
12.000Expected 10/1/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

0603L PCB Mount SMD/SMT 500 mA 6 VDC 1 A 40 A 680 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 0603 LoRho SL 0.75A
Datasheet
343In Stock
8.000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

Low Rho SMD/SMT SMD/SMT 750 mA 6 VDC 1.5 A 50 A 165 mOhms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V 350MA-HD 100A SMD
Datasheet
253In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

0805L SMD/SMT SMD/SMT 350 mA 6 VDC 750 mA 100 A 1.2 Ohms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 6V 3.5A-HD 50A SMD
Datasheet
671In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

Low Rho SMD/SMT SMD/SMT 3.5 A 6 VDC 7 A 50 A 25 mOhms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 6V 4.0A-HD 50A SMD
Datasheet
1.277In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

Low Rho SMD/SMT SMD/SMT 4 A 6 VDC 9 A 50 A 18 mOhms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 50MA-HD 50A SMD
Datasheet
3.020In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

1206L SMD/SMT SMD/SMT 50 mA 30 VDC 150 mA 10 A 20 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 50MA-HD 50A SMD
Datasheet
1.253In Stock
39.000Expected 11/17/2026
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

1206L SMD/SMT SMD/SMT 50 mA 60 VDC 150 mA 10 A 20 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30V 100MA-HD 10A SMD
Datasheet
2.454In Stock
3.000Expected 9/29/2026
Min.: 1
Mult.: 1
: 3.000
1206L SMD/SMT SMD/SMT 100 mA 30 VDC 250 mA 10 A 10 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 30V 1206 .125A SURF MOUNT
Datasheet
5.409In Stock
177.000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

1206L SMD/SMT SMD/SMT 125 mA 30 VDC 290 mA 100 A 6 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 13.2V POLY 1206 HALOGEN-FREE .75
Datasheet
265In Stock
9.000Expected 8/31/2026
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

1206L SMD/SMT SMD/SMT 750 mA 13.2 VDC 1.5 A 100 A 350 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 8V 1206 0.75A POLYFUSE SMD THIN
Datasheet
5.600In Stock
8.000Expected 9/24/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

1206L PCB Mount SMD/SMT 750 mA 8 VDC 1.5 A 100 A 290 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 12V POLYFUSE 1206 LoRho SL 1.1A
Datasheet
453In Stock
4.000Expected 12/31/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

Low Rho SMD/SMT SMD/SMT 1.1 A 12 VDC 2.2 A 50 A 130 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel