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0755-82798135PTC Resettable Fuses
PTC Resettable Fuses
PTC Resettable Fuses are circuit protection components used to protect electronic systems from overcurrent, short-circuit and fault conditions. Unlike one-time fuses, PTC resettable fuses increase resistance during a fault and can return to a low-resistance state after the fault is removed and the device cools down.
This category includes polymer PTC resettable fuses, PPTC fuses, radial leaded PTC fuses, surface-mount PTC fuses and related overcurrent protection components. These devices are commonly selected based on hold current, trip current, rated voltage, resistance, response time, package type, operating temperature and application requirements.
TomatoElec supplies original PTC Resettable Fuses from recognized manufacturers such as Littelfuse, Bourns, Eaton, Bel Fuse, TE Connectivity, Murata, TDK, Panasonic and other major brands. As an in-stock electronic components supplier and independent distributor, TomatoElec provides inventory support, original component sourcing and BOM sourcing services for global customers.
| Photo | Mfr. Part # | Availability | Price | Quantity | Datasheet | Package/Case | Series | Packaging | Product Status | Type | Voltage - Max | Current - Hold (Ih) (Max) | Current - Trip (It) | Current - Max | Time to Trip | Resistance - Initial (Ri) (Min) | Resistance - Post Trip (R1) (Max) | Resistance - 25°C (Typ) | Operating Temperature | Grade | Qualification | Ratings | Mounting Type | Size / Dimension | Height - Seated (Max) | Thickness (Max) | Lead Spacing |
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72R025XUPTC RESET FUSE 72V 250MA RADIAL |
8,003 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 250 mA | 500 mA | 40 A | 2.5 s | 1.25 Ohms | 3 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.291" Dia x 0.122" T (7.40mm x 3.10mm) | 0.500" (12.70mm) | - | 0.201" (5.10mm) |
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72R030XUPTC RESET FUSE 72V 300MA RADIAL |
4,255 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 300 mA | 600 mA | 40 A | 3 s | 880 mOhms | 2.1 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.291" Dia x 0.122" T (7.40mm x 3.10mm) | 0.500" (12.70mm) | - | 0.201" (5.10mm) |
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72R040XUPTC RESET FUSE 72V 400MA RADIAL |
3,265 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 400 mA | 800 mA | 40 A | 3.8 s | 550 mOhms | 1.29 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.299" Dia x 0.122" T (7.60mm x 3.10mm) | 0.532" (13.50mm) | - | 0.201" (5.10mm) |
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72R050XUPTC RESET FUSE 72V 500MA RADIAL |
9,559 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 500 mA | 1 A | 40 A | 4 s | 500 mOhms | 1.17 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.311" Dia x 0.122" T (7.90mm x 3.10mm) | 0.539" (13.70mm) | - | 0.201" (5.10mm) |
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72R065XUPTC RESET FUSE 72V 650MA RADIAL |
4,000 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 650 mA | 1.3 A | 40 A | 5.3 s | 310 mOhms | 720 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.370" Dia x 0.122" T (9.40mm x 3.10mm) | 0.571" (14.50mm) | - | 0.201" (5.10mm) |
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72R075XUPTC RESET FUSE 72V 750MA RADIAL |
5,324 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 750 mA | 1.5 A | 40 A | 6.3 s | 250 mOhms | 600 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.402" Dia x 0.122" T (10.20mm x 3.10mm) | 0.598" (15.20mm) | - | 0.201" (5.10mm) |
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72R090XUPTC RESET FUSE 72V 900MA RADIAL |
4,620 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 900 mA | 1.8 A | 40 A | 7.2 s | 200 mOhms | 470 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.441" Dia x 0.122" T (11.20mm x 3.10mm) | 0.622" (15.80mm) | - | 0.201" (5.10mm) |
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72R185XFPTC RESET FUSE 72V 1.85A RADIAL |
5,128 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 1.85 A | 3.7 A | 40 A | 12.6 s | 80 mOhms | 190 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.660" Dia x 0.122" T (16.76mm x 3.10mm) | 0.906" (23.00mm) | - | 0.201" (5.10mm) |
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72R300XFPTC RESET FUSE 72V 3A RADIAL |
9,782 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 72R | Bulk | Obsolete | Polymeric | 72V | 3 A | 6 A | 40 A | 19.8 s | 40 mOhms | 100 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.910" Dia x 0.122" T (23.11mm x 3.10mm) | 1.154" (29.30mm) | - | 0.402" (10.20mm) |
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AHRF550SPTC RESET FUSE 16V 5.5A RADIAL |
7,528 | - |
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Datasheet |
Radial, Disc | PolySwitch®, AHRF | Bag | Active | Polymeric | 16V | 5.5 A | 10 A | 100 A | 6 s | 13 mOhms | 37 mOhms | - | -40°C ~ 125°C | Automotive | AEC-Q200 | - | Through Hole | 0.441" L x 0.118" W (11.20mm x 3.00mm) | 0.744" (18.90mm) | - | 0.200" (5.08mm) |
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LR4-1300FPTC RESET FUSE 20V 13A STRAP |
6,292 | - |
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Strap | PolySwitch®, LR4 | Bag | Active | Polymeric | 20V | 13 A | 21.2 A | 100 A | 10 s | 3.5 mOhms | 9 mOhms | - | -40°C ~ 85°C | - | - | - | User Defined | 2.520" L x 0.382" W (64.00mm x 9.70mm) | - | - | - |
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LR4-190XFPTC RESET FUSE 15V 1.9A STRAP |
6,877 | - |
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- |
Strap | PolySwitch®, LR4 | Bag | Active | Polymeric | 15V | 1.9 A | 3.9 A | 100 A | 5 s | 39 mOhms | 102 mOhms | - | -40°C ~ 85°C | - | - | - | User Defined | 0.648" L x 0.283" W (16.45mm x 7.20mm) | - | 0.039" (1.00mm) | - |
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LR4-550RAFPTC RESET FUSE 20V 5.5A STRAP |
5,509 | - |
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- |
Strap | PolySwitch®, LR4 | Bag | Active | Polymeric | 20V | 5.5 A | 10.5 A | 100 A | 5 s | 9 mOhms | 22 mOhms | - | -40°C ~ 85°C | - | - | - | User Defined | - | - | - | - |
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TRF250-180-0.125POLYSWITCH PTC RESET 0.180A T/H |
4,914 | - |
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Datasheet |
Radial, Disc | PolySwitch® | Bag | Active | - | 100V | 180 mA | 650 mA | 10 A | 2 s | - | - | - | - | - | - | - | Through Hole | 0.350" Dia x 0.150" W (8.89mm x 3.81mm) | 0.472" (12.00mm) | - | 0.200" (5.08mm) |
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TRF250-183S-0.110PTC RESET FUSE 100V 183MA RADIAL |
6,046 | - |
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Datasheet |
Radial, Disc | PolySwitch®, TRF250 | Bag | Active | Polymeric | 100V (250V Int) | 183 mA | 685 mA | 10 A | 1.8 s | 800 mOhms | 3.4 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.295" Dia x 0.150" T (7.50mm x 3.80mm) | 0.374" (9.50mm) | - | 0.200" (5.08mm) |
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250R080TUPTC RESET FUSE 60V 80MA RADIAL |
5,485 | - |
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Datasheet |
Radial, Disc | POLY-FUSE®, 250R | Bulk | Obsolete | Polymeric | 60V (250V Int) | 80 mA | 160 mA | 3 A | 4 s | 15 Ohms | 33 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.228" Dia x 0.181" T (5.80mm x 4.60mm) | 0.390" (9.90mm) | - | 0.201" (5.10mm) |
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MF-R015/600-0PTC RESET FUSE 250V 150MA RADIAL |
7,290 | - |
|
Datasheet |
Radial, Box | Multifuse®, MF-R/600 | Bulk | Obsolete | Polymeric | 250V (600V Int) | 150 mA | 300 mA | 3 A | 5 s | 6 Ohms | 22 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.531" L x 0.236" W (13.50mm x 6.00mm) | 0.496" (12.60mm) | - | 0.197" (5.00mm) |
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MF-R016/600-0PTC RESET FUSE 250V 160MA RADIAL |
9,995 | - |
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Datasheet |
Radial, Box | Multifuse®, MF-R/600 | Bulk | Obsolete | Polymeric | 250V (600V Int) | 160 mA | 320 mA | 3 A | 7 s | 4 Ohms | 18 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.630" L x 0.236" W (16.00mm x 6.00mm) | 0.496" (12.60mm) | - | 0.197" (5.00mm) |
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YS5876PTFPTC RESET FUSE 240V 100MA RADIAL |
2,107 | - |
|
Datasheet |
Radial, Disc | PTF | Bulk | Active | Ceramic | 240V | 100 mA | 210 mA | - | - | - | - | 50 Ohms | 10°C ~ 55°C | - | - | - | Through Hole | 0.650" Dia x 0.272" T (16.50mm x 6.90mm) | 0.650" (16.50mm) | - | 0.331" (8.40mm) |
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MXP190BBPTC RESET FUSE 6V 1.9A STRAP |
2,549 | - |
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Datasheet |
Strap | PolySwitch®, MXP | Bag | Obsolete | Polymeric | 6V | 1.9 A | 4.9 A | 50 A | 2 s | 7 mOhms | 24 mOhms | - | - | - | - | - | User Defined | 0.394" L x 0.122" W (10.00mm x 3.11mm) | - | 0.043" (1.10mm) | - |

