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
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 30V 50MA-HD 40A SMD
Datasheet
12 881In 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
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 0805 LoRho SL 3.00A
Datasheet
13 802In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3 000

Low Rho SMD/SMT SMD/SMT 3 A 6 VDC 6 A 50 A 30 mOhms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 24V 500MA-HD 100A MAX
Datasheet
34 177In Stock
12 000Expected 11/17/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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 6V POLYFUSE 1206 LoRho SL 4A
Datasheet
27 830In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3 000

Low Rho SMD/SMT SMD/SMT 4 A 6 VDC 8 A 50 A 16 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V 3.0A 1210 PTC SL
Datasheet
17 923In Stock
Min.: 1
Mult.: 1
: 3 000

Low Rho PCB Mount SMD/SMT 3 A 6 VDC 6 A 50 A 20 mOhms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC PTC 30V POLY 1812 HALOGEN-FREE .35A
Datasheet
19 825In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 PTC 33V 1.10A POLY SURF MOUNT
Datasheet
98 540In Stock
104 000Expected 12/24/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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 24V 3.0A-HD 50A SMD
Datasheet
19 286In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2 500

Low Rho SMD/SMT SMD/SMT 3 A 24 VDC 6 A 50 A 30 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 24V 5.0A-HD 50A SMD
Datasheet
25 280In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 24V 7.0A-HD 22A SMD
Datasheet
13 777In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 .10A 30V 10A Imax
Datasheet
71 452In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

microSMD SMD/SMT SMD/SMT 100 mA 30 VDC 250 mA 10 A 15 Ohms 1210 (3225 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .3A 60V 10A Imax
Datasheet
52 375In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2 000

SMD SMD/SMT SMD/SMT 300 mA 60 VDC 600 mA 10 A 4.8 Ohms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .5A 60V 10A Imax
Datasheet
79 735In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2 000

SMD SMD/SMT SMD/SMT 500 mA 60 VDC 1 A 10 A 1.4 Ohms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30V 40A IMAX
Datasheet
59 546In Stock
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 9V 3A 0603 POLYFUSE SURF MOUNT
Datasheet
5 068In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

Low Rho SMD/SMT SMD/SMT 3 A 9 VDC 6 A 50 A 30 mOhms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 40A 12.7Ohms
Datasheet
10 387In Stock
22 000Expected 9/24/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2 000

miniSMD SMD/SMT SMD/SMT 100 mA 60 VDC 300 mA 40 A 12.7 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 15V POLYFUSE SURF MOUNT 0603 0.08A
Datasheet
975In Stock
4 000Expected 10/1/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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 72V POLYFUSE SURF MOUNT 2920 0.35A
Datasheet
1 801In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 6V POLYFUSE 0402 LoRho SL .100A
Datasheet
5 292In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 6V POLYFUSE 0402 LoRho SL .100A
Datasheet
8 253In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 10 000

Low Rho SMD/SMT SMD/SMT 200 mA 6 VDC 500 mA 40 A 1.25 Ohms 0402 (1005 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 6V 1.0A-HD 40A SMD
Datasheet
3 279In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 10 000

Low Rho SMD/SMT SMD/SMT 1 A 6 VDC 2 A 40 A 250 mOhms 0402 (1005 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 36V 30MA-HD 40A SMD
Datasheet
2 689In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

0603L SMD/SMT SMD/SMT 30 mA 36 V 90 mA 40 A 50 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 15V 0603 .100A POLY SURF MOUNT
Datasheet
4 078In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

0603L SMD/SMT SMD/SMT 100 mA 15 VDC 300 mA 40 A 6 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 9V .200A POLY SURF MOUNT
Datasheet
1 197In Stock
4 000Expected 12/8/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

0603L SMD/SMT SMD/SMT 200 mA 9 VDC 500 mA 40 A 3.5 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 9V .250A POLY SURF MOUNT
Datasheet
1 561In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4 000

0603L SMD/SMT SMD/SMT 250 mA 9 VDC 550 mA 40 A 3 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel