Multifuse® PTC Resettable Fuses

Bourns Multifuse® PTC Resettable Fuses are available in polymer or ceramic with surface-mount, through-hole, or strap-mount configurations. The materials used in these fuses allow them to reset after a fault condition has been removed, and the increase in resistance changes exponentially rather than in a linear manner. Resettable overcurrent protection offers reliability and a longer part life. Bourns Multifuse PTCs provide resettable overcurrent protection, extra-low resistance, and are RoHS compliant. These fuses are ideal circuit protection for a variety of industrial and consumer applications, including computer, battery, automotive, and telecommunications.

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Description Datasheet Availability Pricing (CAD) 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
Bourns Resettable Fuses - PPTC 24V 1.8A-HD 100A MAX
Datasheet
7,000Expected 2026-04-28
Min.: 1
Mult.: 1

MF-LS Strap Mount Axial 1.8 A 24 VDC 3.8 A 100 A 68 mOhms - 40 C + 85 C Bulk
Bourns Resettable Fuses - PPTC PTC RESETTABLE 2.6A 16V SMD 1812
Datasheet
29,930Expected 2026-05-11
Min.: 1
Mult.: 1
Reel: 3,000

MF-MSMF PCB Mount SMD/SMT 16 V 2.6 A - 40 C + 85 C Reel, Cut Tape
Bourns Resettable Fuses - PPTC 6V 4.0A-HD 50A SMD
Datasheet
7,000Expected 2026-05-01
MouseReel Available
Min.: 1
Mult.: 1
Reel: 3,500

MF-NSML SMD/SMT SMD/SMT 4 A 6 VDC 8 A 50 A 14 mOhms 1206 (3216 metric) - 40 C + 85 C Reel, Cut Tape, MouseReel
Bourns Resettable Fuses - PPTC 30V 4.2A-HD 100A MAX
Datasheet
6,500Expected 2026-05-05
Min.: 1
Mult.: 1

MF-S Strap Mount Axial 4.2 A 30 VDC 7.6 A 100 A 24 mOhms - 40 C + 85 C Bulk
Bourns Resettable Fuses - PPTC 12V 4.0A-HD 50A 1210
Datasheet
3,500Expected 2026-02-24
Min.: 1
Mult.: 1
Reel: 3,500

MF-USML PCB Mount SMD/SMT 4 A 12 VDC 8 A 50 A 18 mOhms - 40 C + 85 C Reel, Cut Tape
Bourns Resettable Fuses - PPTC 16V 1.36A-HD 100A MAX
Datasheet
Product Comments
8,000Stock Available
More Info Available
MouseReel Available
Min.: 1
Mult.: 1
Reel: 4,000

MF-SMHT PCB Mount SMD/SMT 1.36 A 16 V 2.72 A 100 A 330 mOhms - 40 C + 85 C Reel, Cut Tape, MouseReel
Bourns Resettable Fuses - PPTC PTC RESETTABLE 1.75A 6V SMD 1206
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 30,000
Mult.: 3,000
Reel: 3,000

MF-NSMF PCB Mount SMD/SMT 1.75 A 6 V 3.5 A 1.75 A - 40 C + 85 C Reel
Bourns Resettable Fuses - PPTC MF-PSMF Design Kit, SMD 0805, 0.1A-1.1A
Datasheet
Non-Stocked Lead-Time 5 Weeks
Min.: 1
Mult.: 1

MF-PSMF Kit
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.05A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 12,000
Mult.: 3,000
Reel: 3,000

MF-R PCB Mount Radial 50 mA 60 V 100 mA 40 A 11.1 Ohms - 40 C + 85 C 5.1 mm Reel
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.1A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 14,000
Mult.: 3,500

MF-R PCB Mount Radial 100 mA 60 V 200 mA 40 A 4.5 Ohms - 40 C + 85 C 5.1 mm Bulk
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.1A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 12,000
Mult.: 3,000
Reel: 3,000

MF-R PCB Mount Radial 100 mA 60 V 200 mA 40 A 4.5 Ohms - 40 C + 85 C 5.1 mm Reel
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.1A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 16,000
Mult.: 4,000
Reel: 4,000

MF-R PCB Mount Radial 100 mA 60 V 200 mA 40 A 4.5 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.17A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 14,000
Mult.: 3,500

MF-R PCB Mount Radial 170 mA 60 V 340 mA 40 A 3.2 Ohms - 40 C + 85 C 5.1 mm Bulk
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.17A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 12,000
Mult.: 3,000
Reel: 3,000

MF-R PCB Mount Radial 170 mA 60 V 340 mA 40 A 3.2 Ohms - 40 C + 85 C 5.1 mm Reel
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.17A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 16,000
Mult.: 4,000
Reel: 4,000

MF-R PCB Mount Radial 170 mA 60 VDC 340 mA 40 A 3.2 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.17A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 16,000
Mult.: 4,000
Reel: 4,000

MF-R PCB Mount Radial 170 mA 60 V 340 mA 40 A 3.2 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.2A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 14,000
Mult.: 3,500

MF-R PCB Mount Radial 200 mA 60 V 400 mA 40 A 2.84 Ohms - 40 C + 85 C 5.1 mm Bulk
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.2A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 16,000
Mult.: 4,000
Reel: 4,000

MF-R PCB Mount Radial 200 mA 60 V 400 mA 40 A 2.84 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.25A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 14,000
Mult.: 3,500

MF-R PCB Mount Radial 250 mA 60 V 500 mA 40 A 1.95 Ohms - 40 C + 85 C 5.1 mm Bulk
Bourns Resettable Fuses - PPTC 60V .25A-HD 40A MAX
Datasheet
Lead-Time 4 Weeks
Min.: 1
Mult.: 1
Reel: 3,000

MF-R PCB Mount Radial 250 mA 60 VDC 500 mA 40 A 1.95 Ohms - 40 C + 85 C 5.1 mm Reel, Cut Tape
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.25A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 12,000
Mult.: 3,000
Reel: 3,000

MF-R PCB Mount Radial 250 mA 60 V 500 mA 40 A 1.95 Ohms - 40 C + 85 C 5.1 mm Reel
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.25A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 1
Mult.: 1
Reel: 4,000

MF-R PCB Mount Radial 250 mA 60 VDC 500 mA 40 A 1.95 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.25A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 16,000
Mult.: 4,000
Reel: 4,000

MF-R PCB Mount Radial 250 mA 60 V 500 mA 40 A 1.95 Ohms - 40 C + 85 C 5.1 mm Ammo Pack
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.3A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 14,000
Mult.: 3,500

MF-R PCB Mount Radial 300 mA 60 V 600 mA 40 A 1.36 Ohms - 40 C + 85 C 5.1 mm Bulk
Bourns Resettable Fuses - PPTC PTC RESETTABLE 0.3A 60V RADIAL LEADED
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 12,000
Mult.: 3,000
Reel: 3,000

MF-R PCB Mount Radial 300 mA 60 V 600 mA 40 A 1.36 Ohms - 40 C + 85 C 5.1 mm Reel