Resettable Surface Mount Fuses

Resettable surface mount fuses are a reusable type of circuit protection device that is able to be mounted onto printed circuit boards. They trip when the current gets too high, but will function again when conditions return to an acceptable level.

How do resettable surface mount fuses work?

Resettable surface mount fuses form part of the circuit on a PCB (printed circuit board), allowing electrical current to flow through them. When a fault such as overcurrent is detected in the circuit, they are tripped, forcing a break in the circuit which prevents electricity from continuing to flow. This prevents any damage to the circuit or attached devices. Unlike non-resettable surface mount fuses, they can be used over and over, as they will reconnect the circuit when conditions return to normal.

Types of resettable surface mount fuses

Resettable surface mount fuses have a number of characteristics that can vary between models, including terminal material, voltage rating and their operating temperature range. They also come in various different sizes.


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Description Price Trip Current Voltage Rating Time to Trip Hold Current Maximum Current Length Height Width Terminal Material Minimum Resistance Maximum Resistance Power Dissipation Minimum Operating Temperature Maximum Operating Temperature
RS Stock No. 138-679
Mfr. Part No.NANOSMDC050F/13.2-2
BrandLittelfuse
TWD10.80
Each (In a Pack of 10)
units
1.1A 13.2 V dc 0.1s 0.5 A 100 A 3.4mm 0.74mm 1.8mm - 0.2Ω 750mΩ 0.8W - +85°C
RS Stock No. 647-8178
Mfr. Part No.MF-MSMF030-2
BrandBourns
TWD10.20
Each (In a Pack of 10)
units
- 30 V 0.1s 0.3 A 10 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.3Ω 0.8W -40°C +85°C
RS Stock No. 787-4259
Mfr. Part No.1812L075/33DR
BrandLittelfuse
TWD15.30
Each (In a Pack of 10)
units
1.5A 33 V dc 0.2s 0.75 A 20 A 4.73mm 1.55mm 3.41mm Tin Plated Copper 0.11Ω 400mΩ 0.8W -40°C +85°C
RS Stock No. 787-4198
Mfr. Part No.1206L050YR
BrandLittelfuse
TWD10.90
Each (In a Pack of 10)
units
1A 6 V dc 0.1s 0.5 A 100 A 3.4mm 0.75mm 1.8mm Tin Plated Copper 0.15Ω 700mΩ 0.6W -40°C +85°C
RS Stock No. 787-4255
Mfr. Part No.1812L110/33MR
BrandLittelfuse
TWD12.80
Each (In a Pack of 10)
units
1.95A 33 V dc 0.5s 1.1 A 20 A 4.73mm 2mm 3.41mm Tin Plated Copper 0.06Ω 200mΩ 0.8W -40°C +85°C
RS Stock No. 647-8342
Mfr. Part No.MF-USMF005-2
BrandBourns
TWD15.60
Each (In a Pack of 10)
units
- 30 V 1.5s 0.05 A 10 A 3.43mm 1.1mm 2.8mm Electroless Nickel Immersion Gold 2.8Ω 50Ω 0.6W -40°C +85°C
RS Stock No. 657-1766
Mfr. Part No.NANOSMDC035F
BrandLittelfuse
TWD7.00
Each (In a Pack of 10)
units
750mA 16 V dc 0.1s 0.35 A 20 A 3.4mm 0.82mm 1.8mm - 0.45Ω 1.35Ω 0.6W - +85°C
RS Stock No. 692-7633
Mfr. Part No.MF-FSMF050X-2
BrandBourns
TWD12.80
Each (In a Pack of 5)
units
1A 6 V 0.1s 0.5 A 40 A 1.85mm 1mm 1.05mm Gold Plated Nickel 0.1Ω 800mΩ 0.5W -40°C +85°C
RS Stock No. 167-4475
Mfr. Part No.MF-FSMF050X-2
BrandBourns
TWD11.60
Each (On a Reel of 4000)
units
1A 6 V 0.1s 0.5 A 40 A 1.85mm 1mm 1.05mm Gold Plated Nickel 0.1Ω 800mΩ 0.5W -40°C +85°C
RS Stock No. 624-3130
Mfr. Part No.NANOSMDC150F-2
BrandLittelfuse
TWD11.70
Each (In a Pack of 10)
units
3A 6 V dc 0.3s 1.5 A 100 A 3.4mm 0.89mm 1.8mm - 0.04Ω 110mΩ 0.8W - +85°C
RS Stock No. 517-7234
Mfr. Part No.MICROSMD035F-2
BrandLittelfuse
TWD9.40
Each (In a Pack of 20)
units
750mA 6 V dc 0.2s 0.35 A 40 A 3.43mm 0.62mm 2.8mm - 0.32Ω 1.3Ω 0.8W - +85°C
RS Stock No. 870-0871
Mfr. Part No.PFNF.050.2
BrandSchurter
TWD7.70
Each (In a Pack of 3000)
units
1A 13.2 V dc 0.1s 0.5 A 100 A 3.4mm 0.85mm 1.4mm Electroless Nickel 0.15Ω 700mΩ 0.4W -40°C +85°C
RS Stock No. 691-7507
Mfr. Part No.MF-PSMF050X-2
BrandBourns
TWD15.40
Each (In a Pack of 5)
units
1A 6 V 0.1s 0.5 A 40 A 2.3mm 0.85mm 1.5mm Gold Plated Nickel 0.15Ω 900mΩ 0.5W -40°C +85°C
RS Stock No. 164-8218
Mfr. Part No.MINISMDC014F-2
BrandLittelfuse
TWD10,821.00
1 Tape of 2000
Tape(s)
280 60 V dc 0.008s 0.14 A 10 A 3.41mm 4.73mm 0.89mm Tin 1.5Ω 0.75W -40°C +85°C
RS Stock No. 167-4473
Mfr. Part No.MF-PSMF050X-2
BrandBourns
TWD12.30
Each (On a Reel of 3000)
units
1A 6 V 0.1s 0.5 A 40 A 2.3mm 0.85mm 1.5mm Gold Plated Nickel 0.15Ω 900mΩ 0.5W -40°C +85°C
RS Stock No. 647-8291
Mfr. Part No.MF-NSMF035-2
BrandBourns
TWD10.60
Each (In a Pack of 10)
units
- 6 V 0.1s 0.35 A 100 A 3.4mm 0.85mm 1.8mm Electroless Nickel Immersion Gold 0.3Ω 1.2Ω 0.6W -40°C +85°C
RS Stock No. 867-5255
Mfr. Part No.MINISMDC014F-2
BrandLittelfuse
TWD9.50
Each (In a Bag of 10)
units
- 60 V dc 0.008s 0.14 A 10 A 3.41mm 4.73mm 0.89mm Tin 1.5Ω 0.75W -40°C +85°C
RS Stock No. 895-1616
Mfr. Part No.0805L050WR
BrandLittelfuse
TWD16.00
Each (In a Pack of 10)
units
1A 6 V dc 0.1s 0.5 A 100 A 2.2mm 1.25mm 1.5mm Solder Plated Copper 0.15Ω 850mΩ 0.5W -40°C +85°C
RS Stock No. 692-7639
Mfr. Part No.MF-FSMF035X-2
BrandBourns
TWD12.80
Each (In a Pack of 5)
units
- 6 V 0.1s 0.35 A 40 A 1.85mm 0.65mm 1.05mm Gold Plated Nickel 0.2Ω 1.4Ω 0.5W -40°C +85°C
RS Stock No. 647-8370
Mfr. Part No.MF-USMF020-2
BrandBourns
TWD10.30
Each (In a Pack of 10)
units
- 30 V 0.02s 0.2 A 10 A 3.43mm 1.1mm 2.8mm Electroless Nickel Immersion Gold 0.4Ω 0.6W -40°C +85°C