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. 651-7582
Mfr. Part No.MF-MSMF160-2
BrandBourns
HK$3.54
Each (In a Pack of 10)
units
2.8A 8 V 2s 1.6 A 100 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.035Ω 99mΩ 0.8W -40°C +85°C
RS Stock No. 174-0399
Mfr. Part No.RF1334-000
BrandLittelfuse
HK$37,666.42
1 Reel of 10000
Reel(s)
280mA 60 V dc 0.008s 0.14 A 10 A 4.73mm 0.89mm 3.41mm - 1.5Ω 0.75W -40°C +85°C
RS Stock No. 174-0772
Mfr. Part No.1812L110/24DR
BrandLittelfuse
HK$4.25
Each (In a Pack of 10)
units
1.95A 24 V dc 0.5s 1.1 A 20 A 4.73mm 1.25mm 3.41mm Solder Plated Copper 0.06Ω 200mΩ 0.8W -40°C +85°C
RS Stock No. 787-4261
Mfr. Part No.2920L150DR
BrandLittelfuse
HK$4.556
Each (In a Pack of 5)
units
3A 33 V dc 2s 1.5 A 40 A 7.98mm 1.25mm 5.44mm Tin Plated Copper 0.08Ω 230mΩ 1.5W -40°C +85°C
RS Stock No. 506-915
Mfr. Part No.MINISMDC160F
BrandLittelfuse
HK$2.311
Each (In a Pack of 10)
units
3.2A 9 V dc 1s 1.6 A 100 A 4.73mm 0.48mm 3.41mm - 0.03Ω 100mΩ 0.8W - +85°C
RS Stock No. 817-1728
Mfr. Part No.MF-S420
BrandBourns
HK$3.55
Each (In a Pack of 10)
units
7.6A 30 V 6s 4.2 A 100 A 17.4mm 1.1mm 13.6mm Quarter Hard Nickel 0.012Ω 24mΩ 2.9W -40°C +85°C
RS Stock No. 692-7633
Mfr. Part No.MF-FSMF050X-2
BrandBourns
HK$4.888
Each (In a Pack of 5)
units
1A 6 V 0.1s 0.5 A 40 A 1.85mm 1mm 1.05mm Gold Plated Nickel 0.1Ω 800mΩ 0.5W -40°C +85°C
RS Stock No. 174-0339
Mfr. Part No.0402L020SLKR
BrandLittelfuse
HK$152,720.44
1 Reel of 10000
Reel(s)
500mA 6 V dc 1s 0.2 A 40 A 1.15mm 0.6mm 0.65mm Tin Plated Copper 0.1Ω 1.25Ω 0.5W -40°C +85°C
RS Stock No. 174-0763
Mfr. Part No.2920L700SLPR
BrandLittelfuse
HK$25.828
Each (In a Pack of 5)
units
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. 174-0704
Mfr. Part No.0251002.MXL
BrandLittelfuse
HK$4.864
Each (In a Pack of 10)
units
- 125 V ac/dc - - 2 A 7.11mm - 2.8 Dia.mm - - 0.04Ω - -55°C +125°C
RS Stock No. 174-0324
Mfr. Part No.0459003.UR
BrandLittelfuse
HK$5.893
Each (On a Reel of 500)
units
- 125 V - - 3 A 7.24mm 3.05mm 4.32mm Tin Plated Copper - 20mΩ - -55°C +125°C
RS Stock No. 174-0724
Mfr. Part No.0251015.MXL
BrandLittelfuse
HK$7.296
Each (In a Pack of 10)
units
- 32 V ac/dc - - 15 A 7.11mm - 2.8 Dia.mm - - 0.004Ω - -55°C +125°C
RS Stock No. 174-0916
Mfr. Part No.RF1600-000
BrandLittelfuse
HK$2,073.68
1 Pack of 1000
Pack(s)
- 14 V dc - - - 1.1mm 0.43mm 0.6mm - - - - -55°C +125°C
RS Stock No. 647-8370
Mfr. Part No.MF-USMF020-2
BrandBourns
HK$2.60
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. 174-0680
Mfr. Part No.2016L075/60MR
BrandLittelfuse
HK$5.24
Each (In a Pack of 10)
units
1.5A 60 V dc 0.5s 0.75 A 20 A 5.44mm 2mm 4.43mm - 0.13Ω 900mΩ 1.4W -40°C +85°C
RS Stock No. 174-0855
Mfr. Part No.RF1180-000
BrandLittelfuse
HK$6.188
Each (In a Pack of 10)
units
3A 24 V dc 1.5s 1.5 A 20 A 4.83mm 1.94mm 3.41mm - 0.04Ω 120mΩ 1W -40°C +85°C
RS Stock No. 867-5321
Mfr. Part No.PICOSMDC010S-2
BrandLittelfuse
HK$2.996
Each (In a Bag of 10)
units
360mA 15 V dc 0.6s 0.13 A 100 A 1.5mm 2.2mm 1mm Tin 1.5Ω 11Ω 0.5W -40°C +85°C
RS Stock No. 174-0696
Mfr. Part No.0460002.UR
BrandLittelfuse
HK$19.698
Each (In a Pack of 5)
units
- 125 V - - 2 A 7.24mm 3.05mm 4.32mm Tin Plated Copper - 72mΩ - -55°C +125°C
RS Stock No. 870-0929
Mfr. Part No.PFRA.300
BrandSchurter
HK$3.358
Each (In a Pack of 500)
units
6A 30 V dc 10.8s 3 A 40 A 12mm 18.3mm 3mm - 0.02Ω 50mΩ 2W -40°C +85°C
RS Stock No. 870-0846
Mfr. Part No.PFMF.110.2
BrandSchurter
HK$1.45
Each (In a Pack of 2000)
units
2.2A 6 V dc 0.3s 1.1 A 100 A 4.73mm 0.85mm 3.07mm Electroless Nickel 0.04Ω 210mΩ 0.8W -40°C +85°C
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