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 (SGD) 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
Lead Spacing
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Littelfuse Resettable Fuses - PPTC .12A 60VDC 250VRMS
Datasheet
3,988In Stock
7,000Expected 8/10/2026
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 RESETTABLE FUSE 230VOLT 10OHM
Datasheet
9,801In Stock
Min.: 1
Mult.: 1

CMF-RL PCB Mount Radial 150 mA 60 VDC 300 mA 3 A 10 Ohms - 40 C + 125 C 5 mm Tray
Bourns Resettable Fuses - PPTC 0.11A 230V 35ohm 220volt 35ohms
Datasheet
12,508In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 400

CMF-SDP PCB Mount SMD/SMT 110 mA 230 VAC 230 mA 2.5 A 35 Ohms - 40 C + 125 C Reel, Cut Tape, MouseReel
Bourns Resettable Fuses - PPTC 24V 1.8A-HD 100A MAX
Datasheet
13,397In Stock
Min.: 1
Mult.: 1

MF-LS Strap Mount Axial 1.8 A 24 VDC 3.8 A 100 A 68 mOhms - 40 C + 85 C Bulk
Bourns Resettable Fuses - PPTC 30V 3.5A-HD 100A MAX
Datasheet
10,615In Stock
Min.: 1
Mult.: 1

MF-S Strap Mount Axial 3.5 A 30 VDC 6.3 A 100 A 31 mOhms - 40 C + 85 C Bulk
Littelfuse Resettable Fuses - PPTC 60V/250V .080A TELECOM
Datasheet
1,500Expected 15/10/2026
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
Bourns Resettable Fuses - PPTC 24V 2.6A-HD 20A MAX
Datasheet
15,819In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

MF-LSMF SMD/SMT SMD/SMT 2.6 A 24 VDC 5.2 A 40 A 75 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Bourns Resettable Fuses - PPTC 24V 3.0A-HD 20A MAX
Datasheet
1,012In Stock
20,000Expected 21/7/2026
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
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.9A 30V RADIAL LEADED
Datasheet
3,021In Stock
7,000Expected 17/7/2026
Min.: 1
Mult.: 1

MF-R/90 PCB Mount Radial 900 mA 30 VDC 1.8 A 40 A 120 mOhms - 40 C + 85 C 5.1 mm Bulk
Bourns Resettable Fuses - PPTC 72V 1.1A-HD 40A MAX
Datasheet
4,170In Stock
Min.: 1
Mult.: 1
: 3,000

MF-RX/72 PCB Mount Radial 1.1 A 72 VDC 2.2 A 40 A 250 mOhms - 40 C + 85 C 5.1 mm Reel, Cut Tape
Bourns Resettable Fuses - PPTC 30V 4A-HD 40A MAX
Datasheet
3,402In Stock
9,000Expected 25/8/2026
Min.: 1
Mult.: 1

MF-R PCB Mount Radial 4 A 30 VDC 8 A 40 A 30 mOhms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC PTC 16V 10A POLY RADIAL LEADS
Datasheet
1,671In Stock
Min.: 1
Mult.: 1
: 1,000

16R PCB Mount Radial 10 A 16 VDC 17 A 100 A 10.2 mOhms - 40 C + 85 C 5.1 mm Reel, Cut Tape
Littelfuse Resettable Fuses - PPTC PTC 16V 3A POLY RADIAL LEADS
Datasheet
1,375In Stock
Min.: 1
Mult.: 1

16R PCB Mount Radial 3 A 16 VDC 5.1 A 100 A 97.5 mOhms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC 1812 15V .5A
Datasheet
5,963In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

1812L SMD/SMT SMD/SMT 500 mA 15 VDC 1 A 100 A 1 Ohms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1812 13.2V 0.75A
Datasheet
5,600In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,000

1812L SMD/SMT SMD/SMT 750 mA 13.2 VDC 1.5 A 100 A 450 mOhms 1812 (4532 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC POLYFUSE TELECOM 60V/250V .080A
Datasheet
886In Stock
1,200Expected 17/8/2026
Min.: 1
Mult.: 1
: 1,200

250R PCB Mount Radial 80 mA 60 VDC 160 mA 3 A 33 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC PTC 250/60V POLYFUSE SMD RA
Datasheet
2,813In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

250S PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 10 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC PTC 15V 2920 3A
Datasheet
779In Stock
18,000Expected 3/11/2026
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 30V POLYFUSE 1.10A RADIAL LEADS
Datasheet
240In Stock
500Expected 4/8/2026
Min.: 1
Mult.: 1

30R PCB Mount Radial 1.1 A 30 VDC 2.2 A 40 A 170 mOhms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC 30V POLYFUSE 1.35A RADIAL LEADS
Datasheet
3,376In Stock
Min.: 1
Mult.: 1
: 2,000

30R PCB Mount Radial 1.35 A 30 VDC 2.7 A 40 A 130 mOhms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC PTC 60V/600V.160A POLY TELECOM
Datasheet
25In Stock
Min.: 1
Mult.: 1
: 500

600R PCB Mount Radial 160 mA 60 VDC 320 mA 3 A 18 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC 60V .10A RADIAL LEAD
Datasheet
1,967In Stock
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
Littelfuse Resettable Fuses - PPTC 60V POLYFUSE .100A RADIAL LEADS
Datasheet
690In Stock
1,500Expected 31/7/2026
Min.: 1
Mult.: 1

60R PCB Mount Radial 100 mA 60 VDC 200 mA 40 A 7.5 Ohms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V POLYFUSE .300A RADIAL LEADS
Datasheet
1,006In Stock
Min.: 1
Mult.: 1

60R PCB Mount Radial 300 mA 60 VDC 600 mA 40 A 2.1 Ohms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V .400A RADIAL LEADS
Datasheet
764In Stock
2,000Expected 26/8/2026
Min.: 1
Mult.: 1
: 2,000

60R PCB Mount Radial 400 mA 60 VDC 800 mA 40 A 1.29 Ohms - 40 C + 85 C 5.1 mm Ammo Pack