PTC Resettable Fuses

Manufacturer 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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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
MF-R900-0-99

MF-R900-0-99

PTC RESET FUSE 30V 9A RADIAL

Bourns Inc.

8,005 -
RFQ
MF-R900-0-99

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-RX012/250-2-0

MF-RX012/250-2-0

PTC RESET FUSE 60V 120MA RADIAL

Bourns Inc.

4,491 -
RFQ
MF-RX012/250-2-0

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-RX110-005

MF-RX110-005

PTC RESET FUSE 60V 1.1A RADIAL

Bourns Inc.

4,442 -
RFQ
MF-RX110-005

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-RX135-0-99

MF-RX135-0-99

PTC RESET FUSE 60V 1.35A RADIAL

Bourns Inc.

6,737 -
RFQ
MF-RX135-0-99

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-H2

MF-RX135-0-H2

PTC RESET FUSE 60V 1.35A RADIAL

Bourns Inc.

2,358 -
RFQ
MF-RX135-0-H2

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-RX160-0-99

MF-RX160-0-99

PTC RESET FUSE 60V 1.6A RADIAL

Bourns Inc.

5,582 -
RFQ
MF-RX160-0-99

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-RX185-005

MF-RX185-005

PTC RESET FUSE 60V 1.85A RADIAL

Bourns Inc.

2,835 -
RFQ
MF-RX185-005

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-RX185-0-14

MF-RX185-0-14

PTC RESET FUSE 60V 1.85A RADIAL

Bourns Inc.

3,430 -
RFQ
MF-RX185-0-14

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-RX185-0-99

MF-RX185-0-99

PTC RESET FUSE 60V 1.85A RADIAL

Bourns Inc.

6,646 -
RFQ
MF-RX185-0-99

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-RX185-2

MF-RX185-2

PTC RESET FUSE 60V 1.85A RADIAL

Bourns Inc.

4,940 -
RFQ
MF-RX185-2

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-RX250-0-99

MF-RX250-0-99

PTC RESET FUSE 60V 2.5A RADIAL

Bourns Inc.

2,764 -
RFQ
MF-RX250-0-99

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-RX300-005

MF-RX300-005

PTC RESET FUSE 60V 3A RADIAL

Bourns Inc.

4,999 -
RFQ
MF-RX300-005

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-RX375-005

MF-RX375-005

PTC RESET FUSE 60V 3.75A RADIAL

Bourns Inc.

6,703 -
RFQ
MF-RX375-005

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-RX375-0-99

MF-RX375-0-99

PTC RESET FUSE 60V 3.75A RADIAL

Bourns Inc.

8,520 -
RFQ
MF-RX375-0-99

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-99

MF-R010-AP-99

PTC RESET FUSE 60V 100MA RADIAL

Bourns Inc.

4,490 -
RFQ
MF-R010-AP-99

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-99

MF-R017-AP-99

PTC RESET FUSE 60V 170MA RADIAL

Bourns Inc.

2,892 -
RFQ
MF-R017-AP-99

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-99

MF-R020-AP-99

PTC RESET FUSE 60V 200MA RADIAL

Bourns Inc.

6,991 -
RFQ
MF-R020-AP-99

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-99

MF-R030-AP-99

PTC RESET FUSE 60V 300MA RADIAL

Bourns Inc.

8,277 -
RFQ
MF-R030-AP-99

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-99

MF-R040-AP-99

PTC RESET FUSE 60V 400MA RADIAL

Bourns Inc.

2,412 -
RFQ
MF-R040-AP-99

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-99

MF-R050-AP-99

PTC RESET FUSE 60V 500MA RADIAL

Bourns Inc.

9,233 -
RFQ
MF-R050-AP-99

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)
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