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. 787-4202
Mfr. Part No.1210L050YR
BrandLittelfuse
TWD13.40
Each (In a Pack of 10)
units
1A 13.2 V dc 0.05s 0.5 A 100 A 3.43mm 0.85mm 2.8mm Tin Plated Copper 0.25Ω 900mΩ 0.6W -40°C +85°C
RS Stock No. 867-5264
Mfr. Part No.MINISMDC030F-2
BrandLittelfuse
TWD11.90
Each (In a Bag of 10)
units
- 30 V dc 0.1s 0.3 A 40 A 3.41mm 4.73mm 0.89mm Tin 0.2Ω 750mΩ 0.8W -40°C +85°C
RS Stock No. 647-8156
Mfr. Part No.MF-MSMF050-2
BrandBourns
TWD12.50
Each (In a Pack of 10)
units
1A 15 V 0.15s 0.5 A 100 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.15Ω 0.8W -40°C +85°C
RS Stock No. 817-1668
Mfr. Part No.MF-MSMF110/24X-2
BrandBourns
TWD18.20
Each (In a Pack of 10)
units
2.2A 24 V 0.5s 1.1 A 20 A 4.83mm 1.6mm 3.41mm Electroless Nickel Immersion Gold 0.06Ω 180mΩ 0.8W -40°C +85°C
RS Stock No. 647-8190
Mfr. Part No.MF-MSMF075-2
BrandBourns
TWD12.30
Each (In a Pack of 10)
units
1.5A 13.2 V 0.2s 0.75 A 100 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.11Ω 450mΩ 0.8W -40°C +85°C
RS Stock No. 517-7111
Mfr. Part No.MINISMDC050F-2
BrandLittelfuse
TWD13.30
Each (In a Pack of 10)
units
1A 24 V dc 0.15s 0.5 A 100 A 4.73mm 0.62mm 3.41mm - 0.15Ω 0.8W - +85°C
RS Stock No. 647-8263
Mfr. Part No.MF-MSMF200-2
BrandBourns
TWD18.40
Each (In a Pack of 10)
units
4A 8 V 3s 2 A 40 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.02Ω 80mΩ 0.8W -40°C +85°C
RS Stock No. 867-5233
Mfr. Part No.MICROSMD110F-2
BrandLittelfuse
TWD15.60
Each (In a Bag of 10)
units
2.2A 6 V dc 0.2s 1.1 A 40 A 2.8mm 3.43mm 0.48mm Tin 0.07Ω 210mΩ 0.8W -40°C +85°C
RS Stock No. 647-8392
Mfr. Part No.MF-USMF035-2
BrandBourns
TWD14.70
Each (In a Pack of 10)
units
- 6 V 0.2s 0.35 A 40 A 3.43mm 0.85mm 2.8mm Electroless Nickel Immersion Gold 0.2Ω 1.3Ω 0.6W -40°C +85°C
RS Stock No. 878-4018
Mfr. Part No.1206L020YR
BrandLittelfuse
TWD44,666.00
1 Pack of 4000
Pack(s)
- 24 V dc 0.1s 0.2 A 100 A 3.4mm 0.75mm 1.8mm Solder Plated Copper 0.65Ω 2.6Ω 0.6W -40°C +85°C
RS Stock No. 647-8027
Mfr. Part No.MF-SM050-2
BrandBourns
TWD11.70
Each (In a Pack of 10)
units
1A 60 V 4s 0.5 A 40 A 7.98mm 3.18mm 5.44mm Tin Plated Brass 0.35Ω 1.4Ω 1.7W -40°C +85°C
RS Stock No. 174-0788
Mfr. Part No.30R300UU
BrandLittelfuse
TWD14.80
Each (In a Pack of 10)
units
6A 30 V dc 10.8s 3 A 40 A 11.4mm 19.2mm 3mm Tin Plated Copper 0.02Ω 80mΩ 2W -40°C +85°C
RS Stock No. 174-0874
Mfr. Part No.RF0313-000
BrandLittelfuse
TWD23.10
Each (In a Pack of 10)
units
5A 15 V dc 25s 2.5 A 40 A 9.4mm 3mm 6.71mm - 0.03Ω 80mΩ 1.9W -40°C +85°C
RS Stock No. 174-0789
Mfr. Part No.1812L200THPR
BrandLittelfuse
TWD13.50
Each (In a Pack of 20)
units
3.5A 8 V dc 2s 2 A 100 A 4.73mm 0.6mm 3.41mm Solder Plated Copper 0.02Ω 70mΩ 0.8W -40°C +85°C
RS Stock No. 647-8077
Mfr. Part No.MF-SM260-2
BrandBourns
TWD17.10
Each (In a Pack of 10)
units
5.2A 6 V 20s 2.6 A 100 A 7.98mm 3mm 5.44mm Tin Plated Brass 0.025Ω 75mΩ 1.7W -40°C +85°C
RS Stock No. 174-0409
Mfr. Part No.RF1352-000
BrandLittelfuse
TWD186,800.00
1 Reel of 20000
Reel(s)
750mA 6 V dc 0.2s 0.35 A 40 A 3.43mm 0.62mm 2.8mm - 0.32Ω 1.3Ω 0.8W -40°C +85°C
RS Stock No. 174-0790
Mfr. Part No.RF1345-000
BrandLittelfuse
TWD18.60
Each (In a Pack of 20)
units
420mA 24 V dc 0.1s 0.2 A 100 A 3.4mm 0.82mm 1.8mm - 0.65Ω 3.1Ω 0.6W -40°C +85°C
RS Stock No. 174-0770
Mfr. Part No.0251010.MRT1L
BrandLittelfuse
TWD19.70
Each (In a Pack of 10)
units
- 125 V ac/dc - - 10 A 7.11mm - 2.8 Dia.mm - - 0.007Ω - -55°C +125°C
RS Stock No. 870-0878
Mfr. Part No.PFNF.110.2
BrandSchurter
TWD29,179.00
1 Pack of 3000
Pack(s)
2.2A 6 V dc 0.3s 1.1 A 100 A 3.4mm 0.7mm 1.4mm Electroless Nickel 0.06Ω 200mΩ 0.6W -40°C +85°C
RS Stock No. 174-0762
Mfr. Part No.0251.750MAT1L
BrandLittelfuse
TWD19.70
Each (In a Pack of 10)
units
- 125 V ac/dc - - 750 mA 7.11mm - 2.8 Dia.mm - - 0.17Ω - -55°C +125°C