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. 895-1625
Mfr. Part No.1206L020YR
BrandLittelfuse
TWD15.00
Each (In a Pack of 10)
units
- 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. 647-8320
Mfr. Part No.MF-NSMF050-2
BrandBourns
TWD10.70
Each (In a Pack of 10)
units
1A 13.2 V 0.1s 0.5 A 100 A 3.4mm 0.85mm 1.8mm Electroless Nickel Immersion Gold 0.15Ω 700mΩ 0.4W -40°C +85°C
RS Stock No. 910-8550
Mfr. Part No.KCA82AB0
BrandBourns
TWD30.00
Each (In a Pack of 5)
units
60A 28 V dc - - 25 A 5.4mm 0.89mm 3.2mm Copper Alloy - 5mΩ - - -
RS Stock No. 517-7054
Mfr. Part No.SMD100F-2
BrandLittelfuse
TWD18.00
Each (In a Pack of 10)
units
2.2A 30 V 0.5s 1.1 A 40 A 7.98mm 3mm 5.44mm - 0.12Ω 480mΩ 1.7W - +85°C
RS Stock No. 174-0412
Mfr. Part No.RF1351-000
BrandWickmann
TWD245,247.00
1 Reel of 20000
Reel(s)
250mA 30 V dc 1s 0.1 A 10 A 3.43mm 0.85mm 2.8mm - 2.1Ω 15Ω 0.8W -40°C +85°C
RS Stock No. 174-0413
Mfr. Part No.RF1355-000
BrandWickmann
TWD242,202.00
1 Reel of 20000
Reel(s)
2.2A 6 V dc 0.2s 1.1 A 40 A 3.43mm 0.48mm 2.8mm - 0.07Ω 210mΩ 0.8W -40°C +85°C
RS Stock No. 174-0388
Mfr. Part No.RF1359-000
BrandWickmann
TWD258,292.00
1 Reel of 15000
Reel(s)
2.2A 6 V dc 0.1s 1.1 A 100 A 3.4mm 0.67mm 1.8mm - 0.07Ω 200mΩ 0.8W -40°C +85°C
RS Stock No. 174-0784
Mfr. Part No.0603L050SLYR
BrandWickmann
TWD48.60
Each (In a Pack of 50)
units
1A 6 V dc 0.1s 0.5 A 50 A 1.8mm 0.75mm 1mm Tin Plated Copper 0.07Ω 350mΩ 0.6W -40°C +85°C
RS Stock No. 494-723
Mfr. Part No.ZEN056V130A24LS
BrandLittelfuse
TWD37.60
Each (In a Pack of 5)
units
- 24 V 0.1s 1.3 A 3 A 4.15mm 2mm 4.15mm - 0.12Ω 160mΩ 0.7W -40°C +85°C
RS Stock No. 164-8231
Mfr. Part No.SMD030F-2018-2
BrandLittelfuse
TWD61,098.00
1 Tape of 4000
Tape(s)
- 60 V dc 1.5s 0.3 A 20 A 5.44mm 1.78mm 4.93mm - 0.5Ω 2.3Ω 1.5W -40°C +85°C
RS Stock No. 174-0389
Mfr. Part No.RF1347-000
BrandWickmann
TWD293,800.00
1 Reel of 15000
Reel(s)
1.1A 13.2 V dc 0.1s 0.5 A 100 A 3.4mm 0.74mm 1.8mm - 0.2Ω 750mΩ 0.8W -40°C +85°C
RS Stock No. 174-0825
Mfr. Part No.1812L150/24MR
BrandWickmann
TWD24.70
Each (In a Pack of 10)
units
3A 24 V dc 1.5s 1.5 A 20 A 4.73mm 1.8mm 3.41mm Solder Plated Copper 0.04Ω 120mΩ 0.8W -40°C +85°C
RS Stock No. 174-0697
Mfr. Part No.1210L150/16WR
BrandWickmann
TWD21.40
Each (In a Pack of 10)
units
3A 16 V dc 0.3s 1.5 A 100 A 3.43mm 1.25mm 2.8mm Solder Plated Copper 0.04Ω 110mΩ 0.8W -40°C +85°C
RS Stock No. 174-0314
Mfr. Part No.0473003.MRT1L
BrandWickmann
TWD26,418.00
1 Reel of 1000
Reel(s)
- 125 V - - 3 A 3.43mm - 7.11 Dia.mm - - 30mΩ - -55°C +125°C
RS Stock No. 174-0359
Mfr. Part No.0603L050SLYR
BrandWickmann
TWD155,622.00
1 Reel of 4000
Reel(s)
1A 6 V dc 0.1s 0.5 A 50 A 1.8mm 0.75mm 1mm Tin Plated Copper 0.07Ω 350mΩ 0.6W -40°C +85°C
RS Stock No. 164-8233
Mfr. Part No.SMD150F/33-2
BrandLittelfuse
TWD16,635.00
1 Tape of 1500
Tape(s)
3A 33 V dc 5s 1.5 A 40 A 9.4mm 3mm 6.71mm - 0.08Ω 230mΩ 1.9W -40°C +85°C
RS Stock No. 787-4170
Mfr. Part No.1210L005WR
BrandLittelfuse
TWD13.70
Each (In a Pack of 10)
units
- 30 V dc 1.5s 0.05 A 10 A 3.43mm 1.25mm 2.8mm Tin Plated Copper 3.6Ω 50Ω 0.6W -40°C +85°C
RS Stock No. 174-0794
Mfr. Part No.RF1353-000
BrandWickmann
TWD14.30
Each (In a Pack of 250)
units
1A 13.2 V dc 0.05s 0.5 A 40 A 3.43mm 0.62mm 2.8mm - 0.25Ω 900mΩ 0.8W -40°C +85°C
RS Stock No. 174-0826
Mfr. Part No.30R250UU
BrandWickmann
TWD12.90
Each (In a Pack of 10)
units
5A 30 V dc 10.3s 2.5 A 40 A 11.4mm 18.3mm 3mm Tin Plated Copper Clad Steel 0.02Ω 70mΩ 1.2W -40°C +85°C
RS Stock No. 647-8099
Mfr. Part No.MF-SM250-2
BrandBourns
TWD11.60
Each (In a Pack of 10)
units
5A 15 V 25s 2.5 A 100 A 9.5mm 3mm 6.71mm Tin Plated Brass 0.024Ω 85mΩ 1.9W -40°C +85°C