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. 174-0328
Mfr. Part No.025101.5MXL
BrandLittelfuse
HK$3,260.00
1 Reel of 1000
Reel(s)
- 125 V ac/dc - - 1.5 A 7.11mm - 2.8 Dia.mm - - 0.08Ω - -55°C +125°C
RS Stock No. 870-0947
Mfr. Part No.PFSM.030.2
BrandSchurter
HK$2.47
Each (In a Pack of 2000)
units
600mA 60 V dc 3s 0.3 A 40 A 7.98mm 3.18mm 5.44mm Tin Plated Brass 0.9Ω 4.8Ω 1.7W -40°C +85°C
RS Stock No. 867-5340
Mfr. Part No.SMD185F-2
BrandLittelfuse
HK$4.039
Each (In a Bag of 10)
units
1.3A 6 V dc 0.4s 0.75 A 40 A 6.9mm 11.4mm 3.1mm Tin Plated Nickel Copper Alloy 0.11Ω 175mΩ 0.3W - +85°C
RS Stock No. 174-0854
Mfr. Part No.RF1183-000
BrandLittelfuse
HK$5.678
Each (In a Pack of 20)
units
5A 12 V dc 5s 2.6 A 100 A 4.83mm 1.52mm 3.41mm - 0.01Ω 40mΩ 1W -40°C +85°C
RS Stock No. 174-0888
Mfr. Part No.RF0319-000
BrandLittelfuse
HK$6.21
Each (In a Pack of 10)
units
2.2A 33 V dc 0.5s 1.1 A 40 A 7.98mm 3mm 5.44mm - 0.12Ω 410mΩ 1.7W -40°C +85°C
RS Stock No. 174-0329
Mfr. Part No.0251004.MXL
BrandLittelfuse
HK$3,260.00
1 Reel of 1000
Reel(s)
- 125 V ac/dc - - 4 A 7.11mm - 2.8 Dia.mm - - 0.02Ω - -55°C +125°C
RS Stock No. 174-0706
Mfr. Part No.0603L050YR
BrandLittelfuse
HK$13.294
Each (In a Pack of 50)
units
1A 6 V dc 0.1s 0.5 A 40 A 1.8mm 0.75mm 1mm Tin Plated Copper 0.1Ω 680mΩ 0.5W -40°C +85°C
RS Stock No. 174-0326
Mfr. Part No.0251005.MXL
BrandLittelfuse
HK$3,260.00
1 Reel of 1000
Reel(s)
- 125 V ac/dc - - 5 A 7.11mm - 2.8 Dia.mm - - 0.01Ω - -55°C +125°C
RS Stock No. 174-0915
Mfr. Part No.RF0314-000
BrandLittelfuse
HK$5.685
Each (In a Pack of 10)
units
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. 174-0905
Mfr. Part No.RF1673-000
BrandLittelfuse
HK$4.919
Each (In a Pack of 100)
units
6.3A 30 V dc 3s 3.5 A 100 A 31.8mm 1.1mm 13.5mm Quarter Hard Nickel 0.01Ω 30mΩ 2.5W -40°C +85°C
RS Stock No. 870-0878
Mfr. Part No.PFNF.110.2
BrandSchurter
HK$1.87
Each (In a Pack of 3000)
units
2.2A 6 V dc 0.3s 1.1 A 100 A 3.4mm 0.7mm 1.4mm Electroless Nickel 0.06Ω 200mΩ 0.6W -40°C +85°C
RS Stock No. 174-0787
Mfr. Part No.1812L075/24DR
BrandLittelfuse
HK$3.796
Each (In a Pack of 20)
units
1.5A 24 V dc 0.2s 0.75 A 100 A 4.73mm 1.2mm 3.41mm Solder Plated Copper 0.11Ω 290mΩ 0.8W -40°C +85°C
RS Stock No. 787-4205
Mfr. Part No.2920L100PR
BrandLittelfuse
HK$5.23
Each (In a Pack of 5)
units
2.2A 33 V dc 0.5s 1.1 A 40 A 7.98mm 1mm 5.44mm Tin Plated Copper 0.12Ω 410mΩ 1.5W -40°C +85°C
RS Stock No. 174-0346
Mfr. Part No.0603L004YR
BrandLittelfuse
HK$61,088.18
1 Reel of 4000
Reel(s)
120mA 24 V dc 1s 0.04 A 20 A 1.8mm 0.75mm 1mm Solder Plated Copper 40Ω 0.5W -40°C +85°C
RS Stock No. 895-1616
Mfr. Part No.0805L050WR
BrandLittelfuse
HK$3.989
Each (In a Pack of 10)
units
1A 6 V dc 0.1s 0.5 A 100 A 2.2mm 1.25mm 1.5mm Solder Plated Copper 0.15Ω 850mΩ 0.5W -40°C +85°C
RS Stock No. 174-0330
Mfr. Part No.2920L700SLPR
BrandLittelfuse
HK$55,694.41
1 Reel of 2000
Reel(s)
14A 6 V dc 0.2s 7 A 50 A 7.98mm 0.65mm 5.44mm Tin Plated Copper 0.001Ω 7mΩ 2.2W -40°C +85°C
RS Stock No. 867-5343
Mfr. Part No.SMD150F/33-2
BrandLittelfuse
HK$3.66
Each (In a Bag 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. 647-8099
Mfr. Part No.MF-SM250-2
BrandBourns
HK$3.722
Each (In a Pack of 10)
units
5A 15 V 25s 2.5 A 100 A 9.5mm 3mm 6.71mm Tin Plated Brass 0.024Ω 85mΩ 1.9W -40°C +85°C
RS Stock No. 161-6925
Mfr. Part No.MF-SM075/60-2
BrandBourns
HK$2,697.16
1 Reel of 2000
Reel(s)
1.5A 60 V 0.3s 0.75 A 10 A 7.98mm 3.18mm 5.44mm Tin Plated Brass 0.23Ω 1.7W -40°C +85°C
RS Stock No. 174-0770
Mfr. Part No.0251010.MRT1L
BrandLittelfuse
HK$4.961
Each (In a Pack of 10)
units
- 125 V ac/dc - - 10 A 7.11mm - 2.8 Dia.mm - - 0.007Ω - -55°C +125°C
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