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. 870-0903
Mfr. Part No.PFRA.050
BrandSchurter
£0.267
Each (In a Pack of 50)
Units
1A 60V dc 4s 0.5A 40 A 7.9mm 13.7mm 3.1mm - 0.41Ω 770mΩ 0.75W -40°C 85°C
RS Stock No. 870-0929
Mfr. Part No.PFRA.300
BrandSchurter
£0.374
Each (In a Pack of 500)
Units
6A 30V dc 10.8s 3A 40 A 12mm 18.3mm 3mm - 0.02Ω 50mΩ 2W -40°C +85°C
RS Stock No. 870-0922
Mfr. Part No.PFRA.185
BrandSchurter
£0.346
Each (In a Pack of 500)
Units
3.7A 30V dc 8.7s 1.85A 40 A 12mm 18.4mm 3mm - 0.04Ω 70mΩ 1W -40°C 85°C
RS Stock No. 870-0890
Mfr. Part No.PFRA.030
BrandSchurter
£0.271
Each (In a Pack of 50)
Units
600mA 60V dc 3s 0.3A 40 A 7.4mm 13.4mm 3.1mm Tin Plated CuFe 0.76Ω 1.36Ω 0.5W -40°C +85°C
RS Stock No. 870-0919
Mfr. Part No.PFRA.110
BrandSchurter
£0.32
Each (In a Pack of 50)
Units
2.2A 30V dc 6.6s 1.1A 40 A 8.9mm 14mm 3mm - 0.1Ω 180mΩ 0.7W -40°C 85°C
RS Stock No. 870-0944
Mfr. Part No.PFRA.900
BrandSchurter
£0.501
Each (In a Pack of 500)
Units
18A 30V dc 20s 9A 40 A 24.2mm 32.9mm 3mm - 0.005Ω 10mΩ 4.2W -40°C 85°C
RS Stock No. 870-0830
Mfr. Part No.PFMF.020.2
BrandSchurter
£0.218
Each (In a Pack of 100)
Units
- 30V dc 0.06s 0.2A 80 A 4.73mm 1.1mm 3.07mm Electroless Nickel 0.4Ω 0.8W -40°C +85°C
RS Stock No. 870-0935
Mfr. Part No.PFRA.800
BrandSchurter
£0.477
Each (In a Pack of 500)
Units
16A 30V dc 18.8s 8A 40 A 24.2mm 32.9mm 3mm - 0.005Ω 20mΩ 4W -40°C 85°C
RS Stock No. 870-0893
Mfr. Part No.PFRA.020
BrandSchurter
£0.24
Each (In a Pack of 500)
Units
400mA 60V dc 2.2s 0.2A 40 A 7.4mm 12.7mm 3.1mm Tin Plated CuFe 1.5Ω 2.84Ω 0.4W -40°C +85°C
RS Stock No. 870-0950
Mfr. Part No.PFSM.075.2
BrandSchurter
£574.18
1 Pack of 2000
Pack(s)
1.5A 30V dc 0.3s 0.75A 80 A 7.98mm 3.18mm 5.44mm Tin Plated Brass 0.23Ω 1.7W -40°C +85°C
RS Stock No. 870-0907
Mfr. Part No.PFRA.075
BrandSchurter
£0.24
Each (In a Pack of 500)
Units
1.5A 60V dc 6.3s 0.75A 40 A 10.4mm 16mm 3.1mm - 0.18Ω 400mΩ 0.9W -40°C 85°C
RS Stock No. 870-0837
Mfr. Part No.PFMF.010.2
BrandSchurter
£251.71
1 Pack of 1500
Pack(s)
- 60V dc 1.5s 0.1A 40 A 4.73mm 1.1mm 3.07mm Electroless Nickel 0.7Ω 15Ω 0.8W -40°C +85°C
RS Stock No. 870-0975
Mfr. Part No.PFUF.110.2
BrandSchurter
£664.45
1 Pack of 3000
Pack(s)
2.2A 6V dc 1s 1.1A 40 A 3.43mm 0.85mm 2.35mm Electroless Nickel 0.05Ω 210mΩ 0.6W -40°C +85°C
RS Stock No. 870-0865
Mfr. Part No.PFMF.260.2
BrandSchurter
£513.88
1 Pack of 2000
Pack(s)
5.2A 6V dc 5s 2.6A 100 A 4.73mm 0.85mm 3.07mm Electroless Nickel 0.015Ω 80mΩ 0.8W -40°C +85°C
RS Stock No. 870-0925
Mfr. Part No.PFRA.250
BrandSchurter
£0.363
Each (In a Pack of 50)
Units
5A 30V dc 10.3s 2.5A 40 A 12mm 18.3mm 3mm - 0.025Ω 48mΩ 1.2W -40°C 85°C
RS Stock No. 870-0856
Mfr. Part No.PFMF.200.2
BrandSchurter
£513.88
1 Pack of 2000
Pack(s)
4A 8V dc 3s 2A 40 A 4.73mm 0.85mm 3.07mm Electroless Nickel 0.02Ω 80mΩ 0.8W -40°C +85°C
RS Stock No. 870-0979
Mfr. Part No.PFUF.150.2
BrandSchurter
£652.85
1 Pack of 3000
Pack(s)
3A 6V dc 5s 1.5A 40 A 3.43mm 0.85mm 2.35mm Electroless Nickel 0.03Ω 110mΩ 0.6W -40°C +85°C
RS Stock No. 870-0871
Mfr. Part No.PFNF.050.2
BrandSchurter
£648.91
1 Pack of 3000
Pack(s)
1A 13.2V dc 0.1s 0.5A 100 A 3.4mm 0.85mm 1.4mm Electroless Nickel 0.15Ω 700mΩ 0.4W -40°C +85°C
RS Stock No. 870-0834
Mfr. Part No.PFMF.050.2
BrandSchurter
£335.60
1 Pack of 2000
Pack(s)
1A 15V dc 0.15s 0.5A 100 A 4.73mm 0.85mm 3.07mm Electroless Nickel 0.15Ω 0.8W -40°C +85°C
RS Stock No. 870-0884
Mfr. Part No.PFRA.017
BrandSchurter
£0.24
Each (In a Pack of 500)
Units
340mA 60V dc 3s 0.17A 40 A 7.4mm 12.7mm 3.1mm Tin Plated CuFe 3.2Ω 0.48W -40°C +85°C