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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Bourns Resettable Fuses - PPTC 30V 1.85A-HD 40A MAX 6 585Prieinamumas
Min.: 1
Daugkart.: 1

MF-R PCB Mount Radial 1.85 A 30 VDC 3.7 A 40 A 70 mOhms - 40 C + 85 C 5.1 mm Bulk
Bourns Resettable Fuses - PPTC 30V 4A-HD 40A MAX 366Prieinamumas
9 000Tikėtina 2026-08-17
Min.: 1
Daugkart.: 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 15V 1206 .500A POLYFUSE 2 599Prieinamumas
24 000Tikėtina 2026-10-01
Min.: 1
Daugkart.: 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 PTC 16V 10A POLY RADIAL LEADS 1 656Prieinamumas
Min.: 1
Daugkart.: 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 1 375Prieinamumas
Min.: 1
Daugkart.: 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 1 643Prieinamumas
8 000Tikėtina 2026-10-27
Min.: 1
Daugkart.: 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 4 336Prieinamumas
Min.: 1
Daugkart.: 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 886Prieinamumas
1 200Tikėtina 2026-08-10
Min.: 1
Daugkart.: 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 2 377Prieinamumas
Min.: 1
Daugkart.: 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 250/60V POLYFUSE SMD RB 1 103Prieinamumas
1 500Tikėtina 2026-09-21
Min.: 1
Daugkart.: 1
: 1 500

250S PCB Mount SMD/SMT 130 mA 60 VDC 260 mA 3 A 13 Ohms - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.10A 33V 2920 4 451Prieinamumas
32 000Pagal užsakymą
Min.: 1
Daugkart.: 1
: 2 000

2920L SMD/SMT SMD/SMT 1.1 A 33 VDC 2.2 A 40 A 410 mOhms 2920 (7450 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 30V POLYFUSE 1.10A RADIAL LEADS 640Prieinamumas
Min.: 1
Daugkart.: 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 PTC 60V/600V.160A POLY TELECOM 15Prieinamumas
Min.: 1
Daugkart.: 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 POLYFUSE .100A RADIAL LEADS 2 079Prieinamumas
Min.: 1
Daugkart.: 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 969Prieinamumas
Min.: 1
Daugkart.: 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 2 764Prieinamumas
Min.: 1
Daugkart.: 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
Littelfuse Resettable Fuses - PPTC 60V POLYFUSE .400A RADIAL LEADS 949Prieinamumas
1 500Tikėtina 2026-08-13
Min.: 1
Daugkart.: 1

60R PCB Mount Radial 400 mA 60 VDC 800 mA 40 A 1.29 Ohms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V .500A RADIAL LEADS 2 830Prieinamumas
Min.: 1
Daugkart.: 1
: 2 000

60R PCB Mount Radial 500 mA 60 VDC 1 A 40 A 1.17 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC 60V POLYFUSE .500A RADIAL LEADS 2 153Prieinamumas
Min.: 1
Daugkart.: 1

60R PCB Mount Radial 500 mA 60 VDC 1 A 40 A 1.17 Ohms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC 60V POLYFUSE 1.10A RADIAL LEADS 1 169Prieinamumas
1 500Tikėtina 2026-10-07
Min.: 1
Daugkart.: 1

60R PCB Mount Radial 1.1 A 60 VDC 2.2 A 40 A 380 mOhms - 40 C + 85 C 5.1 mm Bulk
Littelfuse Resettable Fuses - PPTC .12A 240VAC 20/1.2A Imax 511Prieinamumas
1 200Tikėtina 2026-11-30
Min.: 1
Daugkart.: 1

LVR PCB Mount Radial 120 mA 240 VAC/VDC 300 mA 1.2 A 12 Ohms - 40 C + 85 C 5.8 mm Bulk
Littelfuse Resettable Fuses - PPTC .25A 240VAC 20/3.5A Imax 1 191Prieinamumas
2 500Tikėtina 2026-08-13
Min.: 1
Daugkart.: 1

LVR PCB Mount Radial 250 mA 120 VAC/VDC 560 mA 20 A 3.8 Ohms - 20 C + 85 C 5.8 mm Bulk
Littelfuse Resettable Fuses - PPTC .33A 240VAC 20/4.5A Imax 1 117Prieinamumas
9 000Pagal užsakymą
Min.: 1
Daugkart.: 1

LVR PCB Mount Radial 330 mA 120 VAC/VDC 740 mA 20 A 2.6 Ohms - 40 C + 85 C 5.8 mm Bulk
Littelfuse Resettable Fuses - PPTC .1A 30V Micro SMD AEC-Q200 734Prieinamumas
8 000Tikėtina 2026-10-13
Min.: 1
Daugkart.: 1
: 4 000

microASMD SMD/SMT SMD/SMT 100 mA 30 VDC 250 mA 10 A 15 Ohms 1210 (3225 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .1A 60V Mini SMD AEC-Q200 211Prieinamumas
10 000Tikėtina 2026-08-17
Min.: 1
Daugkart.: 1
: 2 000

miniASMD SMD/SMT SMD/SMT 100 mA 60 VDC 300 mA 40 A 12.7 Ohms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel