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. 647-8140
Mfr. Part No.MF-MSMF020-2
BrandBourns
MYR1.44
Each (In a Pack of 10)
units
- 30V 0.06s 0.2A 80 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.4Ω 0.8W -40°C +85°C
RS Stock No. 692-7633
Mfr. Part No.MF-FSMF050X-2
BrandBourns
MYR3.204
Each (In a Pack of 5)
units
1A 6V 0.1s 0.5A 40 A 1.85mm 1mm 1.05mm Gold Plated Nickel 0.1Ω 800mΩ 0.5W -40°C +85°C
RS Stock No. 647-8207
Mfr. Part No.MF-MSMF110/16-2
BrandBourns
MYR1.656
Each (In a Pack of 10)
units
2.2A 16V 0.3s 1.1A 100 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.04Ω 210mΩ 0.8W -40°C +85°C
RS Stock No. 167-4475
Mfr. Part No.MF-FSMF050X-2
BrandBourns
MYR1.761
Each (On a Reel of 4000)
units
1A 6V 0.1s 0.5A 40 A 1.85mm 1mm 1.05mm Gold Plated Nickel 0.1Ω 800mΩ 0.5W -40°C +85°C
RS Stock No. 647-8184
Mfr. Part No.MF-MSMF075/24-2
BrandBourns
MYR2.233
Each (In a Pack of 10)
units
1.5A 24V 0.2s 0.75A 40 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.11Ω 450mΩ 0.8W -40°C +85°C
RS Stock No. 647-8285
Mfr. Part No.MF-NSMF075-2
BrandBourns
MYR2.665
Each (In a Pack of 10)
units
1.5A 6V 0.1s 0.75A 100 A 3.4mm 0.7mm 1.8mm Electroless Nickel Immersion Gold 0.1Ω 400mΩ 0.4W -40°C +85°C
RS Stock No. 167-4517
Mfr. Part No.MF-FSMF020X-2
BrandBourns
MYR1.77
Each (On a Reel of 6000)
units
500mA 9V 0.6s 0.2A 40 A 1.85mm 0.65mm 1.05mm Gold Plated Nickel 0.55Ω 3.5Ω 0.5W -40°C +85°C
RS Stock No. 647-8178
Mfr. Part No.MF-MSMF030-2
BrandBourns
MYR2.195
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. 692-7636
Mfr. Part No.MF-FSMF020X-2
BrandBourns
MYR3.204
Each (In a Pack of 5)
units
- 9V 0.6s 0.2A 40 A 1.85mm 0.65mm 1.05mm Gold Plated Nickel 0.55Ω 3.5Ω 0.5W -40°C +85°C
RS Stock No. 817-1706
Mfr. Part No.MF-RG900-0
BrandBourns
MYR3.949
Each (In a Pack of 10)
units
15.3A 16V dc 5.5s 9A 45 A 14mm 21.7mm 3mm - 0.0047Ω 13.5mΩ 3.3W -40°C +85°C
RS Stock No. 691-7516
Mfr. Part No.MF-PSMF075X-2
BrandBourns
MYR1.84
Each (In a Pack of 5)
units
1.5A 6V 0.2s 0.75A 40 A 2.3mm 1.25mm 1.5mm Gold Plated Nickel 0.09Ω 350mΩ 0.6W -40°C +85°C
RS Stock No. 910-8617
Mfr. Part No.NR85CB0
BrandBourns
MYR5.654
Each (In a Pack of 5)
units
30A 28V dc - - 12 A 4.8mm 0.89mm 2.8mm Copper Alloy - 15mΩ - - -
RS Stock No. 817-1633
Mfr. Part No.MF-FSMF010X-2
BrandBourns
MYR2.911
Each (In a Pack of 10)
units
300mA 15V 1s 0.1A 40 A 1.85mm 0.65mm 1.05mm Gold Plated Nickel 0.9Ω 0.5W -40°C +85°C
RS Stock No. 817-1670
Mfr. Part No.MF-PSHT010X-2
BrandBourns
MYR3.489
Each (In a Pack of 10)
units
600mA 16V 1.5s 0.1A 40 A 2.3mm 0.8mm 1.5mm Gold Plated Nickel 7.5Ω 1W -40°C +125°C
RS Stock No. 691-7500
Mfr. Part No.MF-PSMF020X-2
BrandBourns
MYR2.402
Each (In a Pack of 5)
units
- 9V 0.02s 0.2A 40 A 2.3mm 0.85mm 1.5mm Gold Plated Nickel 0.65Ω 3.5Ω 0.5W -40°C +85°C
RS Stock No. 647-8033
Mfr. Part No.MF-SM100-2
BrandBourns
MYR1.854
Each (In a Pack of 10)
units
2.2A 30V 0.5s 1.1A 80 A 7.98mm 3mm 5.44mm Tin Plated Brass 0.12Ω 480mΩ 1.7W -40°C +85°C
RS Stock No. 647-7995
Mfr. Part No.MF-SMDF050-2
BrandBourns
MYR1.49
Each (In a Pack of 10)
units
1.2A 60V 3s 0.55A 10 A 5.44mm 1.09mm 4.93mm Electroless Nickel Immersion Gold 0.2Ω 0.9W -40°C +85°C
RS Stock No. 647-8011
Mfr. Part No.MF-SM100/33-2
BrandBourns
MYR1.75
Each (In a Pack of 10)
units
2.2A 33V 0.5s 1.1A 40 A 7.98mm 3mm 5.44mm Tin Plated Brass 0.12Ω 410mΩ 1.7W -40°C +85°C
RS Stock No. 910-8560
Mfr. Part No.LC82AY-1
BrandBourns
MYR5.48
Each (In a Pack of 5)
units
40A 28V dc - - 12 A 5.8mm 1.15mm 3.2mm Copper Alloy - 10mΩ - - -
RS Stock No. 817-1664
Mfr. Part No.MF-MSMF075/30-2
BrandBourns
MYR3.339
Each (In a Pack of 10)
units
1.5A 13.2V 0.2s 0.75A 100 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.11Ω 450mΩ 0.8W -40°C +85°C