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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Results: 122
Select Image Part # Mfr. Description Datasheet Availability Pricing (IDR) 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 Lead Spacing Qualification Packaging
Littelfuse Resettable Fuses - PPTC 30V POLYFUSE 1.10A RADIAL LEADS 510In Stock
Rp10.641
Rp9.815
Rp8.146
Rp7.522
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 PTC 60V/600V.160A POLY TELECOM 1.015In Stock
Rp22.566
Rp20.914
Rp17.282
Rp15.943
Reel
Rp11.319
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 POLYFUSE .100A RADIAL LEADS 1.840In Stock
Rp10.824
Rp9.870
Rp8.182
Rp6.806
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 439In Stock
Rp9.907
Rp9.026
Rp7.504
Rp6.916
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 2.764In Stock
Rp13.026
Rp11.540
Rp9.907
Rp8.769
Reel
Rp5.522
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
Littelfuse Resettable Fuses - PPTC 60V POLYFUSE .400A RADIAL LEADS 1.837In Stock
Rp9.173
Rp8.366
Rp6.953
Rp6.421
Min.: 1
Mult.: 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 2.315In Stock
Rp13.393
Rp11.650
Rp10.182
Rp8.879
Reel
Rp5.926
Min.: 1
Mult.: 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 1.780In Stock
Rp10.824
Rp9.870
Rp8.201
Rp7.173
Min.: 1
Mult.: 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 1.10A RADIAL LEADS 2.583In Stock
Rp21.465
Rp19.630
Rp15.833
Rp15.044
Reel
Rp10.439
Min.: 1
Mult.: 1
: 1.000
60R PCB Mount Radial 1.1 A 60 VDC 2.2 A 40 A 380 mOhms - 40 C + 85 C 5.1 mm Ammo Pack
Littelfuse Resettable Fuses - PPTC 60V POLYFUSE 1.10A RADIAL LEADS 999In Stock
1.500Expected 26/10/2026
Rp19.814
Rp18.273
Rp13.172
Rp12.567
Min.: 1
Mult.: 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 .9A 30V SMD AEC-Q200 925In Stock
4.000Expected 05/01/2027
Cut Tape
Rp14.860
Rp13.704
Rp11.063
Rp10.531
Reel
Rp6.696
Min.: 1
Mult.: 1
: 2.000
ASMD SMD/SMT SMD/SMT 900 mA 30 VDC 2.16 A 40 A 480 mOhms 2920 (7450 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .12A 240VAC 20/1.2A Imax 1.461In Stock
Rp13.209
Rp12.090
Rp10.054
Rp9.265
Min.: 1
Mult.: 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 3.680In Stock
Rp13.026
Rp11.925
Rp9.907
Rp9.136
Min.: 1
Mult.: 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 .1A 30V Micro SMD AEC-Q200 1.312In Stock
12.000Expected 06/10/2026
Cut Tape
Rp11.925
Rp10.934
Rp9.081
Rp8.146
Reel
Rp4.898
Min.: 1
Mult.: 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 .14A 60V Mini SMD AEC-Q200 3.713In Stock
Cut Tape
Rp10.274
Rp9.430
Rp7.834
Rp7.210
Reel
Rp4.440
Min.: 1
Mult.: 1
: 2.000
miniASMD SMD/SMT SMD/SMT 140 mA 60 VDC 280 mA 10 A 6 Ohms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .2A 30V Mini SMD AEC-Q200 4.760In Stock
Cut Tape
Rp10.274
Rp9.430
Rp7.834
Rp7.210
Reel
Rp5.357
Min.: 1
Mult.: 1
: 2.000
miniASMD SMD/SMT SMD/SMT 200 mA 30 VDC 400 mA 10 A 3.3 Ohms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.1A 16V Mini SMD AEC-Q200 3.988In Stock
Cut Tape
Rp10.274
Rp9.338
Rp7.760
Rp7.155
Reel
Rp5.596
Min.: 1
Mult.: 1
: 2.000
miniASMD SMD/SMT SMD/SMT 1.1 A 16 VDC 2.2 A 100 A 180 mOhms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.1A 24V Mini SMD AEC-Q200 1.414In Stock
1.500Expected 17/11/2026
Cut Tape
Rp13.209
Rp11.723
Rp9.999
Rp8.769
Reel
Rp5.816
Min.: 1
Mult.: 1
: 1.500
miniASMD SMD/SMT SMD/SMT 1.1 A 24 VDC 2.2 A 20 A 180 mOhms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.25A 16V Mini SMD AEC-Q200 1.729In Stock
Cut Tape
Rp11.191
Rp9.467
Rp8.458
Rp6.953
Reel
Rp4.898
Min.: 1
Mult.: 1
: 2.000
miniASMD SMD/SMT SMD/SMT 1.25 A 16 VDC 2.5 A 100 A 140 mOhms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.5A 16V Mini SMD AEC-Q200 2.050In Stock
Cut Tape
Rp10.274
Rp9.338
Rp7.760
Rp7.155
Reel
Rp6.036
Min.: 1
Mult.: 1
: 2.000
miniASMD SMD/SMT SMD/SMT 1.5 A 16 VDC 2.8 A 100 A 110 mOhms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 1.5A 24V Mini SMD AEC-Q200 2.102In Stock
Cut Tape
Rp15.044
Rp13.778
Rp11.081
Rp10.457
Reel
Rp7.834
Min.: 1
Mult.: 1
: 1.000
miniASMD SMD/SMT SMD/SMT 1.5 A 24 VDC 3 A 20 A 120 mOhms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC 2.6A 16V Mini SMD AEC-Q200 2.657In Stock
Cut Tape
Rp13.760
Rp12.622
Rp10.494
Rp9.668
Reel
Rp6.384
Min.: 1
Mult.: 1
: 1.500
miniASMD SMD/SMT SMD/SMT 2.6 A 16 VDC 5 A 100 A 50 mOhms 1812 (4532 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .16A 48V Nano SMD AEC-Q200 1.201In Stock
6.000Expected 23/12/2026
Cut Tape
Rp10.641
Rp9.668
Rp8.036
Rp7.412
Reel
Rp4.293
Min.: 1
Mult.: 1
: 3.000
nanoASMDC SMD/SMT SMD/SMT 160 mA 48 VDC 450 mA 10 A 5 Ohms 1206 (3216 metric) - 40 C + 85 C AEC-Q200 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC .2A 24V Nano SMD AEC-Q200 216In Stock
6.000Expected 06/10/2026
Cut Tape
Rp9.907
Rp8.751
Rp7.577
Rp6.550
Reel
Rp4.018
Min.: 1
Mult.: 1
: 3.000
nanoASMDC SMD/SMT SMD/SMT 200 mA 24 VDC 420 mA 100 A 3.1 Ohms 1206 (3216 metric) - 40 C + 85 C AEC-Q100 Reel, Cut Tape, MouseReel
Littelfuse Resettable Fuses - PPTC RGEF1200 979In Stock
Rp19.263
Rp17.759
Rp14.750
Rp13.613
Min.: 1
Mult.: 1
RGEF PCB Mount Radial 12 A 16 VDC 20.4 A 100 A 8.6 mOhms - 40 C + 85 C 10.9 mm Bulk