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. 517-7082
Mfr. Part No.SMD200F-2
BrandLittelfuse
MYR3.99
Each (In a Pack of 10)
units
4A 15 V dc 12s 2 A 40 A 9.4mm 3mm 6.71mm - 0.05Ω 125mΩ 1.9W - +85°C
RS Stock No. 517-7240
Mfr. Part No.MICROSMD050F-2
BrandLittelfuse
MYR1.908
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. 817-1725
Mfr. Part No.MF-SVS175-0
BrandBourns
MYR3.342
Each (In a Pack of 5)
units
4.2A 10 V 5s 1.75 A 100 A 6.4mm 0.9mm 5.5mm Weldable Nickel 0.017Ω 31mΩ 2.1W -40°C +85°C
RS Stock No. 517-7032
Mfr. Part No.SMD050F-2
BrandLittelfuse
MYR2.354
Each (In a Pack of 10)
units
1A 60 V 4s 0.5 A 10 A 7.98mm 3.18mm 5.44mm - 0.35Ω 1.4Ω 1.7W - +85°C
RS Stock No. 517-7105
Mfr. Part No.MINISMDC020F-2
BrandLittelfuse
MYR1.572
Each (In a Pack of 10)
units
400mA 30 V dc 0.02s 0.2 A 10 A 4.73mm 0.89mm 3.41mm - 0.6Ω 3.3Ω 0.8W - +85°C
RS Stock No. 867-5264
Mfr. Part No.MINISMDC030F-2
BrandLittelfuse
MYR2.347
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. 494-723
Mfr. Part No.ZEN056V130A24LS
BrandLittelfuse
MYR6.726
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. 164-8219
Mfr. Part No.MINISMDC030F-2
BrandLittelfuse
MYR3,058.00
1 Tape of 2000
Tape(s)
600 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. 517-7111
Mfr. Part No.MINISMDC050F-2
BrandLittelfuse
MYR1.698
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. 867-5261
Mfr. Part No.MINISMDC075F/24-2
BrandLittelfuse
MYR2.272
Each (In a Bag of 10)
units
1.5A 24 V dc 0.3s 0.75 A 40 A 3.41mm 4.83mm 1.46mm Tin 0.09Ω 290mΩ 0.8W -40°C +85°C
RS Stock No. 506-921
Mfr. Part No.MINISMDC125F
BrandLittelfuse
MYR2.327
Each (In a Pack of 10)
units
2.5A 6 V dc 0.4s 1.25 A 100 A 4.73mm 0.48mm 3.41mm - 0.05Ω 140mΩ 0.8W - +85°C
RS Stock No. 624-3152
Mfr. Part No.NANOSMDC075F-2
BrandLittelfuse
MYR1.448
Each (In a Pack of 10)
units
1.5A 6 V dc 0.1s 0.75 A 100 A 3.4mm 0.68mm 1.8mm - 0.09Ω 300mΩ 0.8W - +85°C
RS Stock No. 647-8140
Mfr. Part No.MF-MSMF020-2
BrandBourns
MYR1.673
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. 895-1638
Mfr. Part No.2016L100/33DR
BrandLittelfuse
MYR2.442
Each (In a Pack of 10)
units
2.2A 33 V dc 0.5s 1.1 A 40 A 5.44mm 1.25mm 4.43mm Solder Plated Copper 0.1Ω 400mΩ 1.4W -40°C +85°C
RS Stock No. 817-1706
Mfr. Part No.MF-RG900-0
BrandBourns
MYR3.921
Each (In a Pack of 10)
units
15.3A 16 V dc 5.5s 9 A 45 A 14mm 21.7mm 3mm - 0.0047Ω 13.5mΩ 3.3W -40°C +85°C
RS Stock No. 870-0840
Mfr. Part No.PFMF.125.2
BrandSchurter
MYR0.991
Each (In a Pack of 2000)
units
2.5A 6 V dc 0.4s 1.25 A 100 A 4.73mm 0.85mm 3.07mm Electroless Nickel 0.035Ω 140mΩ 0.8W -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 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. 870-0834
Mfr. Part No.PFMF.050.2
BrandSchurter
MYR0.991
Each (In a Pack of 2000)
units
1A 15 V dc 0.15s 0.5 A 100 A 4.73mm 0.85mm 3.07mm Electroless Nickel 0.15Ω 0.8W -40°C +85°C
RS Stock No. 647-8178
Mfr. Part No.MF-MSMF030-2
BrandBourns
MYR2.053
Each (In a Pack of 10)
units
- 30 V 0.1s 0.3 A 10 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.3Ω 0.8W -40°C +85°C
RS Stock No. 517-7054
Mfr. Part No.SMD100F-2
BrandLittelfuse
MYR1.881
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
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