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. 174-0882
Mfr. Part No.RF0311-000
BrandWickmann
TWD24.30
Each (In a Pack of 10)
units
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. 174-0764
Mfr. Part No.1210L075/24PR
BrandWickmann
TWD21.80
Each (In a Pack of 10)
units
1.5A 24 V dc 0.1s 0.75 A 100 A 3.43mm 1.8mm 2.8mm Tin Plated Copper 0.13Ω 400mΩ 0.6W -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. 506-937
Mfr. Part No.NANOSMDC020F
BrandLittelfuse
TWD8.50
Each (In a Pack of 10)
units
420mA 24 V dc 0.1s 0.2 A 100 A 3.4mm 0.82mm 1.8mm - 0.65Ω 3.1Ω 0.6W - +85°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. 546-3030
Mfr. Part No.MICROSMD010F-2
BrandLittelfuse
TWD12.40
Each (In a Pack of 20)
units
250mA 30 V dc 1s 0.1 A 10 A 3.43mm 0.85mm 2.8mm - 2.1Ω 15Ω 0.8W - +85°C
RS Stock No. 647-8140
Mfr. Part No.MF-MSMF020-2
BrandBourns
TWD9.90
Each (In a Pack of 10)
units
- 30 V 0.06s 0.2 A 80 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.4Ω 0.8W -40°C +85°C
RS Stock No. 174-0458
Mfr. Part No.RF0314-000
BrandWickmann
TWD235,884.00
1 Reel of 10000
Reel(s)
600mA 60 V dc 3s 0.3 A 10 A 7.98mm 3.18mm 5.44mm - 1.2Ω 4.8Ω 1.7W -40°C +85°C
RS Stock No. 867-5321
Mfr. Part No.PICOSMDC010S-2
BrandLittelfuse
TWD15.90
Each (In a Bag of 10)
units
360mA 15 V dc 0.6s 0.13 A 100 A 1.5mm 2.2mm 1mm Tin 1.5Ω 11Ω 0.5W -40°C +85°C
RS Stock No. 174-0678
Mfr. Part No.0251004.MRT1L
BrandWickmann
TWD24.50
Each (In a Pack of 10)
units
- 125 V ac/dc - - 4 A 7.11mm - 2.8 Dia.mm - - 0.02Ω - -55°C +125°C
RS Stock No. 174-0829
Mfr. Part No.RF1346-000
BrandWickmann
TWD20.00
Each (In a Pack of 20)
units
750mA 16 V dc 0.1s 0.35 A 20 A 3.4mm 0.82mm 1.8mm - 0.45Ω 1.35Ω 0.6W -40°C +85°C
RS Stock No. 174-0316
Mfr. Part No.046002.5UR
BrandWickmann
TWD49.70
Each (On a Reel of 500)
units
- 125 V - - 2.5 A 7.24mm 3.05mm 4.32mm Tin Plated Copper - 52mΩ - -55°C +125°C
RS Stock No. 910-8579
Mfr. Part No.LC85AY-1
BrandBourns
TWD41.00
Each (In a Pack of 5)
units
40A 28 V dc - - 12 A 5.8mm 1.15mm 3.2mm Copper Alloy - 10mΩ - - -
RS Stock No. 867-5239
Mfr. Part No.MICROSMD075F-2
BrandLittelfuse
TWD15.00
Each (In a Bag of 10)
units
1.5A 6 V dc 0.1s 0.75 A 40 A 2.8mm 3.43mm 0.62mm Tin 0.11Ω 400mΩ 0.8W -40°C +85°C
RS Stock No. 174-0381
Mfr. Part No.30R500UF
BrandWickmann
TWD12.00
Each (In a Box of 200)
units
10A 30 V dc 14.5s 5 A 40 A 14mm 25.6mm 3mm Tin Plated Copper 0.01Ω 50mΩ 3W -40°C +85°C
RS Stock No. 174-0790
Mfr. Part No.RF1345-000
BrandWickmann
TWD19.50
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. 174-0889
Mfr. Part No.RF0323-000
BrandWickmann
TWD17.60
Each (In a Pack of 200)
units
800mA 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. 174-0313
Mfr. Part No.0242.200UR
BrandWickmann
TWD79.00
Each (On a Reel of 500)
units
- 250 V - - 200 mA 3.02mm - 8.4mm - - 2.68Ω - -40°C +125°C
RS Stock No. 174-0895
Mfr. Part No.RF1672-000
BrandWickmann
TWD27.80
Each (In a Pack of 100)
units
7.6A 30 V dc 6s 4.2 A 100 A 32.4mm 1.1mm 13.6mm Quarter Hard Nickel 0.01Ω 20mΩ 2.9W -40°C +85°C
RS Stock No. 174-0855
Mfr. Part No.RF1180-000
BrandWickmann
TWD17.70
Each (In a Pack of 10)
units
3A 24 V dc 1.5s 1.5 A 20 A 4.83mm 1.94mm 3.41mm - 0.04Ω 120mΩ 1W -40°C +85°C