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. 517-7105
Mfr. Part No.MINISMDC020F-2
BrandLittelfuse
kr 3,31
Each (In a Pack of 10)
Units
400mA 30V dc 0.02s 0.2A 10 A 4.73mm 0.89mm 3.41mm - 0.6Ω 3.3Ω 0.8W - +85°C
RS Stock No. 647-8112
Mfr. Part No.MF-SM150-2
BrandBourns
kr 3,44
Each (In a Pack of 10)
Units
3A 15V 5s 1.5A 100 A 9.5mm 3mm 6.71mm Tin Plated Brass 0.06Ω 250mΩ 1.9W -40°C +85°C
RS Stock No. 517-7054
Mfr. Part No.SMD100F-2
BrandLittelfuse
kr 4,018
Each (In a Pack of 10)
Units
2.2A 30V 0.5s 1.1A 40 A 7.98mm 3mm 5.44mm - 0.12Ω 480mΩ 1.7W - +85°C
RS Stock No. 647-8241
Mfr. Part No.MF-NSMF012-2
BrandBourns
kr 3,131
Each (In a Pack of 10)
Units
- 30V 0.2s 0.12A 10 A 3.4mm 1.1mm 1.8mm Electroless Nickel Immersion Gold 1.35Ω 8.5Ω 0.4W -40°C +85°C
RS Stock No. 817-1614
Mfr. Part No.CMF-RL25U-0
BrandBourns
kr 4,686
Each (In a Pack of 10)
Units
150mA 220V 0.25s 0.06A 900 mA - 3.5mm 5.2mm - - 25Ω - -40°C +125°C
RS Stock No. 787-4259
Mfr. Part No.1812L075/33DR
BrandLittelfuse
kr 3,998
Each (In a Pack of 10)
Units
1.5A 33V dc 0.2s 0.75A 20 A 4.73mm 1.55mm 3.41mm Tin Plated Copper 0.11Ω 400mΩ 0.8W -40°C +85°C
RS Stock No. 817-1686
Mfr. Part No.MF-RG400-0
BrandBourns
kr 6,879
Each (In a Pack of 10)
Units
6.8A 16V dc 1.7s 4A 20 A 8.9mm 12.8mm 3mm - 0.021Ω 60mΩ 2.4W -40°C +85°C
RS Stock No. 867-5255
Mfr. Part No.MINISMDC014F-2
BrandLittelfuse
kr 3,31
Each (In a Bag of 10)
Units
- 60V dc 0.008s 0.14A 10 A 3.41mm 4.73mm 0.89mm Tin 1.5Ω 0.75W -40°C +85°C
RS Stock No. 647-8178
Mfr. Part No.MF-MSMF030-2
BrandBourns
kr 2,552
Each (In a Pack of 10)
Units
- 30V 0.1s 0.3A 10 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.3Ω 0.8W -40°C +85°C
RS Stock No. 517-7111
Mfr. Part No.MINISMDC050F-2
BrandLittelfuse
kr 3,21
Each (In a Pack of 10)
Units
1A 24V dc 0.15s 0.5A 100 A 4.73mm 0.62mm 3.41mm - 0.15Ω 0.8W - +85°C
RS Stock No. 817-1655
Mfr. Part No.MF-LSMF185/33X-2
BrandBourns
kr 6,112
Each (In a Pack of 10)
Units
3.7A 33V 2.5s 1.85A 40 A 7.98mm 1.6mm 5.44mm Electroless Nickel Immersion Gold 0.045Ω 150mΩ 1.5W -40°C +85°C
RS Stock No. 787-4192
Mfr. Part No.1210L020WR
BrandLittelfuse
kr 3,21
Each (In a Pack of 10)
Units
- 30V dc 0.02s 0.2A 10 A 3.43mm 1mm 2.8mm Tin Plated Copper 0.8Ω 0.6W -40°C +85°C
RS Stock No. 647-8077
Mfr. Part No.MF-SM260-2
BrandBourns
kr 2,496
Each (In a Pack of 10)
Units
5.2A 6V 20s 2.6A 100 A 7.98mm 3mm 5.44mm Tin Plated Brass 0.025Ω 75mΩ 1.7W -40°C +85°C
RS Stock No. 787-4170
Mfr. Part No.1210L005WR
BrandLittelfuse
kr 3,21
Each (In a Pack of 10)
Units
- 30V dc 1.5s 0.05A 10 A 3.43mm 1.25mm 2.8mm Tin Plated Copper 3.6Ω 50Ω 0.6W -40°C +85°C
RS Stock No. 867-5352
Mfr. Part No.SMD300F-2
BrandLittelfuse
kr 7,697
Each (In a Bag of 10)
Units
- 65V ac/dc - 3A 12 A 6.25mm 2.36mm 2.64mm Copper, Nickel, Tin - 5.3mΩ - -55°C +125°C
RS Stock No. 647-8162
Mfr. Part No.MF-MSMF014-2
BrandBourns
kr 3,011
Each (In a Pack of 10)
Units
- 60V 0.15s 0.14A 40 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.4Ω 6.5Ω 0.8W -40°C +85°C
RS Stock No. 895-1638
Mfr. Part No.2016L100/33DR
BrandLittelfuse
kr 4,975
Each (In a Pack of 10)
Units
2.2A 33V dc 0.5s 1.1A 40 A 5.44mm 1.25mm 4.43mm Solder Plated Copper 0.1Ω 400mΩ 1.4W -40°C +85°C
RS Stock No. 817-1674
Mfr. Part No.MF-RG1100-0
BrandBourns
kr 14,227
Each (In a Pack of 10)
Units
18.7A 16V dc 7s 11A 55 A 17.5mm 26mm 3mm - 0.0037Ω 8.9mΩ 3.7W -40°C +85°C
RS Stock No. 546-3030
Mfr. Part No.MICROSMD010F-2
BrandLittelfuse
kr 2,902
Each (In a Pack of 20)
Units
250mA 30V dc 1s 0.1A 10 A 3.43mm 0.85mm 2.8mm - 2.1Ω 15Ω 0.8W - +85°C
RS Stock No. 817-1683
Mfr. Part No.MF-RG300-0
BrandBourns
kr 6,829
Each (In a Pack of 10)
Units
5.1A 16V 1s 3A 100 A 7.1mm 11mm 3mm Tin Plated Copper 0.038Ω 65mΩ 2.3W -40°C +85°C
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