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. 691-7490
Mfr. Part No.MF-PSMF010X-2
BrandBourns
TWD11.60
Each (In a Pack of 5)
units
- 15 V 1.5s 0.1 A 40 A 2.3mm 0.85mm 1.5mm Gold Plated Nickel 7.5Ω 0.5W -40°C +85°C
RS Stock No. 870-0859
Mfr. Part No.PFMF.150.2
BrandSchurter
TWD16,403.00
1 Pack of 2000
Pack(s)
3A 6 V dc 0.5s 1.5 A 100 A 4.73mm 0.85mm 3.07mm Electroless Nickel 0.03Ω 120mΩ 0.8W -40°C +85°C
RS Stock No. 174-0823
Mfr. Part No.RF1406-000
BrandLittelfuse
TWD14.10
Each (In a Pack of 20)
units
2.2A 8 V dc 0.3s 1.1 A 100 A 4.73mm 0.62mm 3.41mm - 0.04Ω 210mΩ 1.2W -40°C +85°C
RS Stock No. 164-8217
Mfr. Part No.MICROSMD350LR-2
BrandLittelfuse
TWD37,168.00
1 Tape of 3000
Tape(s)
9A 6 V dc 10s 3.5 A 50 A 3.43mm 2.8mm 1mm Gold Plated Nickel 0.0025Ω 11mΩ 1W -40°C +85°C
RS Stock No. 174-0366
Mfr. Part No.2920L200/24DR
BrandLittelfuse
TWD18,150.00
1 Reel of 1500
Reel(s)
4A 24 V dc 5s 2 A 40 A 7.98mm 1.25mm 5.44mm - 0.05Ω 120mΩ 1.5W -40°C +85°C
RS Stock No. 647-8134
Mfr. Part No.MF-MSMF010-2
BrandBourns
TWD9.80
Each (In a Pack of 10)
units
- 60 V 1.5s 0.1 A 40 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.7Ω 15Ω 0.8W -40°C +85°C
RS Stock No. 870-0972
Mfr. Part No.PFUF.075.2
BrandSchurter
TWD29,878.00
1 Pack of 3000
Pack(s)
1.5A 6 V dc 0.1s 0.75 A 40 A 3.43mm 0.85mm 2.35mm Electroless Nickel 0.07Ω 450mΩ 0.6W -40°C +85°C
RS Stock No. 174-0682
Mfr. Part No.1210L110/16WR
BrandLittelfuse
TWD22.70
Each (In a Pack of 10)
units
2.2A 16 V dc 0.1s 1.1 A 100 A 3.43mm 1.25mm 2.8mm Tin Plated Copper 0.06Ω 210mΩ 0.6W -40°C +85°C
RS Stock No. 870-0941
Mfr. Part No.PFSM.050.2
BrandSchurter
TWD25,819.00
1 Pack of 2000
Pack(s)
1A 60 V dc 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. 174-0362
Mfr. Part No.0805L075SLYR
BrandLittelfuse
TWD152,272.00
1 Reel of 4000
Reel(s)
1.5A 6 V dc 0.2s 0.75 A 50 A 2.2mm 0.75mm 1.5mm Tin Plated Copper 0.04Ω 160mΩ 0.6W -40°C +85°C
RS Stock No. 870-0880
Mfr. Part No.PFRA.010
BrandSchurter
TWD12.00
Each (In a Pack of 50)
units
200mA 60 V dc 4s 0.1 A 40 A 7.4mm 12.7mm 3.1mm Tin Plated Nickel Copper 2.5Ω 4.5Ω 0.38W -40°C +85°C
RS Stock No. 517-7240
Mfr. Part No.MICROSMD050F-2
BrandLittelfuse
TWD14.80
Each (In a Pack of 20)
units
1A 13.2 V dc 0.05s 0.5 A 40 A 3.43mm 0.62mm 2.8mm - 0.25Ω 900mΩ 0.8W - +85°C
RS Stock No. 164-8226
Mfr. Part No.NANOSMDC200F-2
BrandLittelfuse
TWD28,706.00
1 Tape of 3000
Tape(s)
4.7A 6 V dc 1.5s 2.35 A 100 A 3.4mm 1.8mm 1.1mm Tin 0.02Ω 72mΩ 1W - +85°C
RS Stock No. 174-0317
Mfr. Part No.0251.250MRT1L
BrandLittelfuse
TWD17,314.00
1 Reel of 1000
Reel(s)
- 125 V ac/dc - - 250 mA 7.11mm - 2.8 Dia.mm - - 0.66Ω - -55°C +125°C
RS Stock No. 910-8601
Mfr. Part No.NR72CB0
BrandBourns
TWD48.80
Each (In a Pack of 5)
units
30A 28 V dc - - 12 A 4.8mm 0.89mm 2.8mm Copper Alloy - 15mΩ - - -
RS Stock No. 174-0837
Mfr. Part No.RF1182-000
BrandLittelfuse
TWD21.30
Each (In a Pack of 20)
units
2.2A 24 V dc 0.5s 1.1 A 20 A 4.83mm 1.46mm 3.41mm - 0.06Ω 180mΩ 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. 174-0696
Mfr. Part No.0460002.UR
BrandLittelfuse
TWD100.40
Each (In a Pack of 5)
units
- 125 V - - 2 A 7.24mm 3.05mm 4.32mm Tin Plated Copper - 72mΩ - -55°C +125°C
RS Stock No. 174-0793
Mfr. Part No.1812L110/16DR
BrandLittelfuse
TWD13.80
Each (In a Pack of 20)
units
1.95A 16 V dc 0.3s 1.1 A 100 A 4.73mm 1.07mm 3.41mm Solder Plated Copper 0.06Ω 180mΩ 0.8W -40°C +85°C
RS Stock No. 647-8005
Mfr. Part No.MF-SM030-2
BrandBourns
TWD11.20
Each (In a Pack of 10)
units
- 60 V 3s 0.3 A 40 A 7.98mm 3.18mm 5.44mm Tin Plated Brass 0.9Ω 4.8Ω 1.7W -40°C +85°C