PTC Fuses for AC/DC Power Supplies

A Positive Thermal Coefficient fuse, or PTC thermistor, is a thermally sensitive semiconductor resistor that increases in resistance as temperature increases to limit current to a load. When the voltage input for a power supply is too far above or below what is specified, the excess current can damage components. Besides shutting down the power supply altogether, one can effectively limit the current by using the predictable resistive response of a PTC.

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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
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Minimum Operating Temperature
Maximum Operating Temperature
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Littelfuse Resettable Fuses - PPTC Radial Lead .3A 72V 40A Imax
Datasheet
Product Comments
3.286In Stock
6.000Expected 12/2/2026
Min.: 1
Mult.: 1
: 3.000

RXEF PCB Mount Radial 300 mA 72 VDC 600 mA 40 A 2.1 Ohms - 40 C + 85 C 5.8 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC Radial Lead .5A 72V 40A Imax
Datasheet
Product Comments
4.887In Stock
6.000Expected 8/20/2026
Min.: 1
Mult.: 1
: 3.000

RXEF PCB Mount Radial 500 mA 72 VDC 1 A 40 A 1.17 Ohms - 40 C + 85 C 5.8 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC Radial Lead .75A 72V 40A Imax
Datasheet
Product Comments
215In Stock
1.000Expected 8/18/2026
Min.: 1
Mult.: 1

RXEF PCB Mount Radial 750 mA 72 VDC 1.5 A 40 A 600 mOhms - 40 C + 85 C 5.8 mm Bulk
Littelfuse Resettable Fuses - PPTC Radial Lead 2.5A 72V 40A Imax
Datasheet
Product Comments
1.807In Stock
Min.: 1
Mult.: 1
: 1.000

RXEF PCB Mount Radial 2.5 A 72 VDC 5 A 40 A 130 mOhms - 40 C + 85 C 10.9 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 15V 40A 0.05Ohms
Datasheet
4.101In Stock
8.000Expected 11/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2.000

SMD SMD/SMT SMD/SMT 3 A 15 VDC 6 A 40 A 50 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC Polyswitch 0.26A Restive Range -2
Datasheet
1.120In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

TS250 PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 15 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 250V .250A-HD 3A MAX (R)
Datasheet
107In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 200

TSM600 PCB Mount SMD/SMT 250 mA 250 VDC 860 mA 3 A 5 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Bourns Resettable Fuses - PPTC 24V 3.0A-HD 20A MAX
Datasheet
18.802In Stock
24.000Expected 11/10/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

MF-LSMF SMD/SMT SMD/SMT 3 A 24 VDC 5.2 A 40 A 75 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.85A 33V 2920
Datasheet
88.360On Order
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

2920L SMD/SMT SMD/SMT 1.85 A 33 VDC 3.7 A 40 A 150 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Bourns Resettable Fuses - PPTC 33V 1.85A-HD 40A MAX
Datasheet
11.951On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

MF-LSMF SMD/SMT SMD/SMT 1.85 A 33 VDC 3.7 A 40 A 150 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 15V 1206 .500A POLYFUSE
Datasheet
51.777On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

1206L SMD/SMT SMD/SMT 500 mA 15 VDC 1 A 100 A 750 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 0.30A 60V 2920
Datasheet
20.819Expected 8/13/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

2920L 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 PTC 15V 2920 3A
Datasheet
17.942Expected 11/3/2026
MouseReel Available
Min.: 1
Mult.: 1
: 1.500

2920L SMD/SMT SMD/SMT 3 A 15 VDC 5 A 40 A 48 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.35A 60V RADIAL
Datasheet
8.167On Order
Min.: 1
Mult.: 1

60R PCB Mount Radial 1.35 A 60 VDC 2.7 A 40 A 300 mOhms - 40 C + 85 C 5.1 mm Bulk
Bourns Resettable Fuses - PPTC RESETTABLE FUSE 220VOLT 25OHM
Datasheet
14.000Expected 11/16/2026
Min.: 1
Mult.: 1

CMF-RL PCB Mount Radial 60 mA 230 VAC 150 mA 900 mA 25 Ohms - 40 C + 125 C 5 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V/250V .080A TELECOM
Datasheet
1.474Expected 8/13/2026
Min.: 1
Mult.: 1

250R PCB Mount Radial 80 mA 60 VDC 160 mA 3 A 33 Ohms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V .10A RADIAL LEAD
Datasheet
3.700Expected 12/1/2026
Min.: 1
Mult.: 1
: 2.000

60R PCB Mount Radial 100 mA 60 VDC 200 mA 40 A 7.5 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Bourns Resettable Fuses - PPTC PTC RESETTABLE 3.0A 72V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 6.000
Mult.: 3.000

MF-RX/72 PCB Mount Radial 3 A 72 VDC 6 A 40 A 60 mOhms - 40 C + 85 C 10.2 mm Bulk
Littelfuse Resettable Fuses - PPTC .25A 72V 40A Imax
Datasheet
Product Comments
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1
: 2.000

RXEF PCB Mount Radial 250 mA 72 VDC 500 mA 40 A 3 Ohms - 40 C + 85 C 5.8 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC 72V 3.75A-HD 40A RXEF
Datasheet
Product Comments
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

RXEF PCB Mount Radial 3.75 A 72 VDC 7.5 A 40 A 80 mOhms - 40 C + 85 C 10.9 mm Bulk
Littelfuse Resettable Fuses - PPTC 250V .12A-HD 3A MAX
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1
Mult.: 1

TRF250 PCB Mount Radial 120 mA 60 VDC 240 mA 3 A 16 Ohms - 40 C + 85 C 5 mm Bulk
Bourns Resettable Fuses - PPTC 0.90A 60V 0.14ohm Short Lead Length
Datasheet
Non-Stocked
Min.: 1
Mult.: 1

MF-R/90 PCB Mount Radial 900 mA 60 VDC 1.8 A 40 A 310 mOhms - 40 C + 85 C 5.1 mm Bulk