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 (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 6V POLYFUSE 0402 LoRho SL .100A
Datasheet
4,141In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 POLYFUSE 0402 LoRho SL .500A
Datasheet
3,064In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 10MA-HD 40A SMD
Datasheet
18,325In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0603L SMD/SMT SMD/SMT 10 mA 60 VDC 50 mA 40 A 100 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 60V 20MA-HD 40A SMD
Datasheet
11,281In Stock
8,000Expected 16/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 36V 30MA-HD 40A SMD
Datasheet
14,012In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0603L SMD/SMT SMD/SMT 30 mA 36 VDC 90 mA 40 A 50 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 36V 30MA-HD 40A SMD
Datasheet
3,100In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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
3,111In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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
1,385In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 6V .350A POLY SURF MOUNT
Datasheet
4,230In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0603L SMD/SMT SMD/SMT 350 mA 6 VDC 750 mA 40 A 1 Ohms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 6V POLY 0603 0.5A
Datasheet
6,770In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 1A
Datasheet
5,784In Stock
8,000Expected 16/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

Low Rho SMD/SMT SMD/SMT 1 A 6 VDC 1.8 A 50 A 120 mOhms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 0603 LoRho SL 1.5A
Datasheet
3,022In Stock
4,000Expected 23/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

Low Rho SMD/SMT SMD/SMT 1.5 A 6 VDC 3 A 50 A 80 mOhms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 6V POLYFUSE 0603 LoRho SL 1.75A
Datasheet
17,123In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

Low Rho SMD/SMT SMD/SMT 1.75 A 6 VDC 3.5 A 50 A 60 mOhms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 6V 2.0A-HD 50A MAX
Datasheet
4,456In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

Low Rho SMD/SMT SMD/SMT 2 A 6 VDC 4 A 50 A 40 mOhms 0603 (1608 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 0.10A 24V 0805
Datasheet
4,439In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0805L SMD/SMT SMD/SMT 100 mA 24 VDC 300 mA 100 A 6 Ohms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 9V 0805 .200A POLYFUSE
Datasheet
4,391In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

0805L SMD/SMT SMD/SMT 200 mA 9 VDC 500 mA 100 A 3.5 Ohms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 0.50A 6V 0805
Datasheet
2,219In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

0805L SMD/SMT SMD/SMT 500 mA 6 VDC 1 A 100 A 850 mOhms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 9V 1.1A 0805 POLYFUSE SURF MOUNT
Datasheet
2,118In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

0805L PCB Mount SMD/SMT 1.1 A 6 VDC 2 A 100 A 160 mOhms 0805 (2012 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel

Littelfuse Resettable Fuses - PPTC 6V 3.0A-HD 50A SMD
Datasheet
2,426In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

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 6V 4.0A-HD 50A SMD
Datasheet
1,651In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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
32,099In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 60V 100MA-HD 10A SMD
Datasheet
53,515In Stock
28,910Expected 17/02/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

1206L SMD/SMT SMD/SMT 100 mA 60 VDC 250 mA 10 A 10 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 60V 3.5A-HD 10A SMD
Datasheet
4,874In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,000

1206L PCB Mount SMD/SMT 100 mA 60 VDC 250 mA 10 A 10 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30V 1206 .125A SURF MOUNT
Datasheet
29,406In Stock
33,000Expected 28/05/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 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 24 V .2A .05s
Datasheet
14,809In Stock
12,000Expected 08/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

1206L SMD/SMT SMD/SMT 200 mA 24 VDC 420 mA 100 A 2.6 Ohms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel