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 (IDR) 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 750MA-HD 10A MAX
Datasheet
12.605In Stock
14.000Expected 23/09/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

SMD SMD/SMT SMD/SMT 750 mA 60 VDC 1.5 A 10 A 1 Ohms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30V 40A IMAX
Datasheet
18.886In Stock
42.155Expected 02/09/2026
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 1.5A 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
9.420In 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 1.8A 33V 40A Imax
Datasheet
10.131In Stock
30.000Expected 21/10/2026
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
18.240In Stock
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
9.951In 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
6.488In 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
4.718In Stock
16.000Expected 23/09/2026
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
608In 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
145In Stock
32.000Expected 06/10/2026
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 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
833In Stock
39.000Expected 17/11/2026
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
1.444In Stock
3.000Expected 03/09/2026
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 8V 1206 0.75A POLYFUSE SMD THIN
Datasheet
5.320In Stock
8.000Expected 01/09/2026
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
553In Stock
4.000Expected 31/12/2026
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
Littelfuse Resettable Fuses - PPTC PTC 6V 1206 1.5A POLYFUSE SMD THIN
Datasheet
964In Stock
72.000Expected 10/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 3.000

1206L PCB Mount SMD/SMT 1.5 A 8 VDC 3 A 100 A 120 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 8V 1.5A-HD 100A SMD
Datasheet
1.065In Stock
Min.: 1
Mult.: 1
: 3.000

1206L SMD/SMT SMD/SMT 1.5 A 8 VDC 3 A 100 A 120 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 1206 LoRho SL 3.80A
Datasheet
1.357In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

Low Rho SMD/SMT SMD/SMT 2.82 A 6 VDC 8 A 50 A 14 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 0.35A 6V 1210
Datasheet
4.894In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

1210L SMD/SMT SMD/SMT 350 mA 6 VDC 700 mA 100 A 1.3 Ohms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel