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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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MF-R900-0-99PTC RESET FUSE 30V 9A RADIAL |
8,005 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-R | Bulk | Obsolete | Polymeric | 30V | 9 A | 18 A | 40 A | 20 s | 5 mOhms | 20 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.953" L x 0.118" W (24.20mm x 3.00mm) | 1.295" (32.90mm) | - | 0.402" (10.20mm) |
|
MF-RX012/250-2-0PTC RESET FUSE 60V 120MA RADIAL |
4,491 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX/250 | Bulk | Discontinued at Digi-Key | Polymeric | 60V (250V Int) | 120 mA | - | 3 A | - | 8 Ohms | 16 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.256" L x 0.181" W (6.50mm x 4.60mm) | 0.433" (11.00mm) | - | 0.201" (5.10mm) |
|
MF-RX110-005PTC RESET FUSE 60V 1.1A RADIAL |
4,442 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Active | Polymeric | 60V | 1.1 A | 2.2 A | 40 A | 8.2 s | 150 mOhms | 380 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.427" L x 0.122" W (10.84mm x 3.10mm) | 0.662" (16.84mm) | - | 0.201" (5.10mm) |
|
MF-RX135-0-99PTC RESET FUSE 60V 1.35A RADIAL |
6,737 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Obsolete | Polymeric | 60V | 1.35 A | 2.7 A | 40 A | 9.6 s | 120 mOhms | 300 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.483" L x 0.122" W (12.26mm x 3.10mm) | 0.718" (18.26mm) | - | 0.201" (5.10mm) |
|
MF-RX135-0-H2PTC RESET FUSE 60V 1.35A RADIAL |
2,358 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Active | Polymeric | 60V | 1.35 A | 2.7 A | 40 A | 9.6 s | 120 mOhms | 300 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.483" L x 0.122" W (12.26mm x 3.10mm) | 0.718" (18.26mm) | - | 0.201" (5.10mm) |
|
MF-RX160-0-99PTC RESET FUSE 60V 1.6A RADIAL |
5,582 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Obsolete | Polymeric | 60V | 1.6 A | 3.2 A | 40 A | 11.4 s | 90 mOhms | 220 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.642" L x 0.122" W (16.30mm x 3.10mm) | 0.839" (21.30mm) | - | 0.201" (5.10mm) |
|
MF-RX185-005PTC RESET FUSE 60V 1.85A RADIAL |
2,835 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Active | Polymeric | 60V | 1.85 A | 3.7 A | 40 A | 12.6 s | 80 mOhms | 190 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.701" L x 0.122" W (17.80mm x 3.10mm) | 0.902" (22.90mm) | - | 0.201" (5.10mm) |
|
MF-RX185-0-14PTC RESET FUSE 60V 1.85A RADIAL |
3,430 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Obsolete | Polymeric | 60V | 1.85 A | 3.7 A | 40 A | 12.6 s | 80 mOhms | 190 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.701" L x 0.122" W (17.80mm x 3.10mm) | 0.902" (22.90mm) | - | 0.201" (5.10mm) |
|
MF-RX185-0-99PTC RESET FUSE 60V 1.85A RADIAL |
6,646 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Obsolete | Polymeric | 60V | 1.85 A | 3.7 A | 40 A | 12.6 s | 80 mOhms | 190 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.701" L x 0.122" W (17.80mm x 3.10mm) | 0.902" (22.90mm) | - | 0.201" (5.10mm) |
|
MF-RX185-2PTC RESET FUSE 60V 1.85A RADIAL |
4,940 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Tape & Reel (TR) | Obsolete | Polymeric | 60V | 1.85 A | 3.7 A | 40 A | 12.6 s | 80 mOhms | 190 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.701" L x 0.122" W (17.80mm x 3.10mm) | 0.902" (22.90mm) | - | 0.201" (5.10mm) |
|
MF-RX250-0-99PTC RESET FUSE 60V 2.5A RADIAL |
2,764 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Obsolete | Polymeric | 60V | 2.5 A | 5 A | 40 A | 15.6 s | 50 mOhms | 130 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.839" L x 0.122" W (21.30mm x 3.10mm) | 1.039" (26.40mm) | - | 0.402" (10.20mm) |
|
MF-RX300-005PTC RESET FUSE 60V 3A RADIAL |
4,999 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Active | Polymeric | 60V | 3 A | 6 A | 40 A | 19.8 s | 40 mOhms | 100 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.980" L x 0.122" W (24.90mm x 3.10mm) | 1.181" (30.00mm) | - | 0.402" (10.20mm) |
|
MF-RX375-005PTC RESET FUSE 60V 3.75A RADIAL |
6,703 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Active | Polymeric | 60V | 3.75 A | 7.5 A | 40 A | 24 s | 30 mOhms | 80 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 1.118" L x 0.122" W (28.40mm x 3.10mm) | 1.319" (33.50mm) | - | 0.402" (10.20mm) |
|
MF-RX375-0-99PTC RESET FUSE 60V 3.75A RADIAL |
8,520 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-RX | Bulk | Obsolete | Polymeric | 60V | 3.75 A | 7.5 A | 40 A | 24 s | 30 mOhms | 80 mOhms | - | -40°C ~ 85°C | - | - | - | Through Hole | 1.118" L x 0.122" W (28.40mm x 3.10mm) | 1.319" (33.50mm) | - | 0.402" (10.20mm) |
|
MF-R010-AP-99PTC RESET FUSE 60V 100MA RADIAL |
4,490 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-R | Tape & Box (TB) | Obsolete | Polymeric | 60V | 100 mA | 200 mA | 40 A | 4 s | 2.5 Ohms | 7.5 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) |
|
MF-R017-AP-99PTC RESET FUSE 60V 170MA RADIAL |
2,892 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-R | Tape & Box (TB) | Obsolete | Polymeric | 60V | 170 mA | 340 mA | 40 A | 3 s | 2 Ohms | 8 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) |
|
MF-R020-AP-99PTC RESET FUSE 60V 200MA RADIAL |
6,991 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-R | Tape & Box (TB) | Obsolete | Polymeric | 60V | 200 mA | 400 mA | 40 A | 2.2 s | 1.5 Ohms | 4.4 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) |
|
MF-R030-AP-99PTC RESET FUSE 60V 300MA RADIAL |
8,277 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-R | Tape & Box (TB) | Obsolete | Polymeric | 60V | 300 mA | 600 mA | 40 A | 3 s | 760 mOhms | 2.1 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.291" Dia x 0.122" T (7.40mm x 3.10mm) | 0.528" (13.40mm) | - | 0.201" (5.10mm) |
|
MF-R040-AP-99PTC RESET FUSE 60V 400MA RADIAL |
2,412 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-R | Tape & Box (TB) | Obsolete | Polymeric | 60V | 400 mA | 800 mA | 40 A | 3.8 s | 520 mOhms | 1.29 Ohms | - | -40°C ~ 85°C | - | - | - | Through Hole | 0.291" Dia x 0.122" T (7.40mm x 3.10mm) | 0.539" (13.70mm) | - | 0.201" (5.10mm) |
|
MF-R050-AP-99PTC RESET FUSE 60V 500MA RADIAL |
9,233 | - |
|
Datasheet |
Radial, Disc | Multifuse®, MF-R | Tape & Box (TB) | Obsolete | Polymeric | 60V | 500 mA | 1 A | 40 A | 4 s | 410 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) |

