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. 867-5328
Mfr. Part No.PICOSMDC050S-2
BrandLittelfuse
TWD16.10
Each (In a Bag of 10)
units
1.25A 6 V dc 0.1s 0.55 A 100 A 1.5mm 2.2mm 0.93mm Tin 0.15Ω 800mΩ 0.5W -40°C +85°C
RS Stock No. 867-5255
Mfr. Part No.MINISMDC014F-2
BrandLittelfuse
TWD13.70
Each (In a Bag of 10)
units
- 60 V dc 0.008s 0.14 A 10 A 3.41mm 4.73mm 0.89mm Tin 1.5Ω 0.75W -40°C +85°C
RS Stock No. 691-7507
Mfr. Part No.MF-PSMF050X-2
BrandBourns
TWD16.40
Each (In a Pack of 5)
units
1A 6 V 0.1s 0.5 A 40 A 2.3mm 0.85mm 1.5mm Gold Plated Nickel 0.15Ω 900mΩ 0.5W -40°C +85°C
RS Stock No. 647-8370
Mfr. Part No.MF-USMF020-2
BrandBourns
TWD10.20
Each (In a Pack of 10)
units
- 30 V 0.02s 0.2 A 10 A 3.43mm 1.1mm 2.8mm Electroless Nickel Immersion Gold 0.4Ω 0.6W -40°C +85°C
RS Stock No. 870-0871
Mfr. Part No.PFNF.050.2
BrandSchurter
TWD29,179.00
1 Pack of 3000
Pack(s)
1A 13.2 V dc 0.1s 0.5 A 100 A 3.4mm 0.85mm 1.4mm Electroless Nickel 0.15Ω 700mΩ 0.4W -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. 692-7636
Mfr. Part No.MF-FSMF020X-2
BrandBourns
TWD28.00
Each (In a Pack of 5)
units
- 9 V 0.6s 0.2 A 40 A 1.85mm 0.65mm 1.05mm Gold Plated Nickel 0.55Ω 3.5Ω 0.5W -40°C +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. 895-1622
Mfr. Part No.1206L150SLYR
BrandLittelfuse
TWD45.10
Each (In a Pack of 10)
units
3.9A 6 V dc 0.3s 1.5 A 50 A 3.4mm 0.7mm 1.8mm Solder Plated Copper 0.01Ω 65mΩ 0.8W -40°C +85°C
RS Stock No. 787-4189
Mfr. Part No.1210L010WR
BrandLittelfuse
TWD13.30
Each (In a Pack of 10)
units
- 30 V dc 1.5s 0.1 A 10 A 3.43mm 1.25mm 2.8mm Tin Plated Copper 1.6Ω 15Ω 0.6W -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. 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. 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. 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. 164-8219
Mfr. Part No.MINISMDC030F-2
BrandLittelfuse
TWD14,200.00
1 Tape of 2000
Tape(s)
600mA 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. 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. 167-4517
Mfr. Part No.MF-FSMF020X-2
BrandBourns
TWD12.80
Each (On a Reel of 6000)
units
500mA 9 V 0.6s 0.2 A 40 A 1.85mm 0.65mm 1.05mm Gold Plated Nickel 0.55Ω 3.5Ω 0.5W -40°C +85°C
RS Stock No. 647-8320
Mfr. Part No.MF-NSMF050-2
BrandBourns
TWD11.00
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. 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. 647-8033
Mfr. Part No.MF-SM100-2
BrandBourns
TWD13.10
Each (In a Pack of 10)
units
2.2A 30 V 0.5s 1.1 A 80 A 7.98mm 3mm 5.44mm Tin Plated Brass 0.12Ω 480mΩ 1.7W -40°C +85°C