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-R055/90-AP

MF-R055/90-AP

PTC RESET FUSE 90V 550MA RADIAL

Bourns Inc.

4,926 -
RFQ
MF-R055/90-AP

Datasheet

Radial, Disc Multifuse®, MF-R/90 Tape & Box (TB) Obsolete Polymeric 90V 550 mA 1.1 A 10 A 60 s 450 mOhms 2 Ohms - -40°C ~ 85°C - - - Through Hole 0.429" Dia x 0.142" T (10.90mm x 3.60mm) 0.657" (16.70mm) - 0.201" (5.10mm)
MF-R055/90U-AP

MF-R055/90U-AP

PTC RESET FUSE 90V 550MA RADIAL

Bourns Inc.

2,933 -
RFQ
MF-R055/90U-AP

Datasheet

Radial, Disc Multifuse®, MF-R/90 Tape & Box (TB) Obsolete Polymeric 90V 550 mA 1.1 A 10 A 28 s 450 mOhms 2 Ohms - -40°C ~ 85°C - - - Through Hole 0.429" Dia x 0.142" T (10.90mm x 3.60mm) 0.657" (16.70mm) - 0.201" (5.10mm)
MF-R065-AP-99

MF-R065-AP-99

PTC RESET FUSE 60V 650MA RADIAL

Bourns Inc.

5,888 -
RFQ
MF-R065-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 60V 650 mA 1.3 A 40 A 5.3 s 270 mOhms 720 mOhms - -40°C ~ 85°C - - - Through Hole 0.382" Dia x 0.122" T (9.70mm x 3.10mm) 0.598" (15.20mm) - 0.201" (5.10mm)
MF-R075/90-AP

MF-R075/90-AP

PTC RESET FUSE 90V 750MA RADIAL

Bourns Inc.

2,641 -
RFQ
MF-R075/90-AP

Datasheet

Radial, Disc Multifuse®, MF-R/90 Tape & Box (TB) Obsolete Polymeric 90V 750 mA 1.5 A 10 A 60 s 370 mOhms 1.65 Ohms - -40°C ~ 85°C - - - Through Hole 0.409" Dia x 0.122" T (10.40mm x 3.10mm) 0.630" (16.00mm) - 0.201" (5.10mm)
MF-R075-AP-99

MF-R075-AP-99

PTC RESET FUSE 60V 750MA RADIAL

Bourns Inc.

9,540 -
RFQ
MF-R075-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 60V 750 mA 1.5 A 40 A 6.3 s 180 mOhms 600 mOhms - -40°C ~ 85°C - - - Through Hole 0.409" Dia x 0.122" T (10.40mm x 3.10mm) 0.630" (16.00mm) - 0.201" (5.10mm)
MF-R090-AP-99

MF-R090-AP-99

PTC RESET FUSE 60V 900MA RADIAL

Bourns Inc.

5,779 -
RFQ
MF-R090-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 60V 900 mA 1.8 A 40 A 7.2 s 140 mOhms 470 mOhms - -40°C ~ 85°C - - - Through Hole 0.461" L x 0.122" W (11.70mm x 3.10mm) 0.657" (16.70mm) - 0.201" (5.10mm)
MF-R090-AP-9-99

MF-R090-AP-9-99

PTC RESET FUSE 60V 900MA RADIAL

Bourns Inc.

6,277 -
RFQ
MF-R090-AP-9-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 60V 900 mA 1.8 A 40 A 7.2 s 140 mOhms 470 mOhms - -40°C ~ 85°C - - - Through Hole 0.461" L x 0.122" W (11.70mm x 3.10mm) 0.657" (16.70mm) - 0.201" (5.10mm)
MF-R135-AP-99

MF-R135-AP-99

PTC RESET FUSE 30V 1.35A RADIAL

Bourns Inc.

4,047 -
RFQ
MF-R135-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 1.35 A 2.7 A 40 A 7.3 s 65 mOhms 170 mOhms - -40°C ~ 85°C - - - Through Hole 0.350" Dia x 0.118" T (8.90mm x 3.00mm) 0.744" (18.90mm) - 0.201" (5.10mm)
MF-R160-AP-99

MF-R160-AP-99

PTC RESET FUSE 30V 1.6A RADIAL

Bourns Inc.

7,403 -
RFQ
MF-R160-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 1.6 A 3.2 A 40 A 8 s 55 mOhms 150 mOhms - -40°C ~ 85°C - - - Through Hole 0.402" Dia x 0.118" T (10.20mm x 3.00mm) 0.661" (16.80mm) - 0.201" (5.10mm)
MF-R185-AP-99

MF-R185-AP-99

PTC RESET FUSE 30V 1.85A RADIAL

Bourns Inc.

6,878 -
RFQ
MF-R185-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 1.85 A 3.7 A 40 A 8.7 s 40 mOhms 110 mOhms - -40°C ~ 85°C - - - Through Hole 0.472" Dia x 0.118" T (12.00mm x 3.00mm) 0.724" (18.40mm) - 0.201" (5.10mm)
MF-R250-AP-10-99

MF-R250-AP-10-99

PTC RESET FUSE 30V 2.5A RADIAL

Bourns Inc.

2,179 -
RFQ
MF-R250-AP-10-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 2.5 A 5 A 40 A 10.3 s 25 mOhms 70 mOhms - -40°C ~ 85°C - - - Through Hole 0.472" L x 0.118" W (12.00mm x 3.00mm) 0.720" (18.30mm) - 0.201" (5.10mm)
MF-R250-AP-99

MF-R250-AP-99

PTC RESET FUSE 30V 2.5A RADIAL

Bourns Inc.

4,260 -
RFQ
MF-R250-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 2.5 A 5 A 40 A 10.3 s 25 mOhms 70 mOhms - -40°C ~ 85°C - - - Through Hole 0.472" L x 0.118" W (12.00mm x 3.00mm) 0.720" (18.30mm) - 0.201" (5.10mm)
MF-R400-AP-99

MF-R400-AP-99

PTC RESET FUSE 30V 4A RADIAL

Bourns Inc.

4,766 -
RFQ
MF-R400-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 4 A 8 A 40 A 12.7 s 10 mOhms 50 mOhms - -40°C ~ 85°C - - - Through Hole 0.567" L x 0.118" W (14.40mm x 3.00mm) 0.976" (24.80mm) - 0.201" (5.10mm)
MF-R500-AP-99

MF-R500-AP-99

PTC RESET FUSE 30V 5A RADIAL

Bourns Inc.

9,051 -
RFQ
MF-R500-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 5 A 10 A 40 A 14.5 s 10 mOhms 50 mOhms - -40°C ~ 85°C - - - Through Hole 0.685" L x 0.118" W (17.40mm x 3.00mm) 0.980" (24.90mm) - 0.402" (10.20mm)
MF-R600-AP-99

MF-R600-AP-99

PTC RESET FUSE 30V 6A RADIAL

Bourns Inc.

4,957 -
RFQ
MF-R600-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete - 30V 6 A 12 A 40 A 16 s - - - - - - - Through Hole 0.760" L x 0.118" W (19.30mm x 3.00mm) 1.256" (31.90mm) - 0.215" (5.45mm)
MF-R700-AP-99

MF-R700-AP-99

PTC RESET FUSE 30V 7A RADIAL

Bourns Inc.

3,634 -
RFQ
MF-R700-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 7 A 14 A 40 A 17.5 s 5 mOhms 30 mOhms - -40°C ~ 85°C - - - Through Hole 0.870" L x 0.118" W (22.10mm x 3.00mm) 1.173" (29.80mm) - 0.402" (10.20mm)
MF-R800-AP-99

MF-R800-AP-99

PTC RESET FUSE 30V 8A RADIAL

Bourns Inc.

9,299 -
RFQ
MF-R800-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) Obsolete Polymeric 30V 8 A 16 A 40 A 18.8 s 5 mOhms 30 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-R900-AP-99

MF-R900-AP-99

PTC RESET FUSE 30V 9A RADIAL

Bourns Inc.

9,592 -
RFQ
MF-R900-AP-99

Datasheet

Radial, Disc Multifuse®, MF-R Tape & Box (TB) 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-RX110-AP

MF-RX110-AP

PTC RESET FUSE 60V 1.1A RADIAL

Bourns Inc.

2,062 -
RFQ
MF-RX110-AP

Datasheet

Radial, Disc Multifuse®, MF-RX Tape & Box (TB) Obsolete 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-RX110-AP-99

MF-RX110-AP-99

PTC RESET FUSE 60V 1.1A RADIAL

Bourns Inc.

3,537 -
RFQ
MF-RX110-AP-99

Datasheet

Radial, Disc Multifuse®, MF-RX Tape & Box (TB) Obsolete 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)
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