Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

46604 Products showing for Fuses & Circuit Breakers

5 / 999+
Bourns Thermal Fuse +90°C 60 A, 28V
  • RS Stock No. 258-6359
  • Mfr. Part No. AC90ABD
Each
MYR8.20
RS PRO 1.25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-6330
Each (In a Pack of 10)
MYR5.034
SIBA 6.3A F Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3420
  • Mfr. Part No. 70-010-04/6.3A
Each (In a Pack of 5)
MYR17.108
Littelfuse 0.5A Resettable Fuse, 13.2V dc
  • RS Stock No. 517-7240
  • Mfr. Part No. MICROSMD050F-2
Each (In a Pack of 20)
MYR1.683
Eaton RCCB, 40A, 4 Pole, 300mA, Type B, 230 V ac, 400 V ac
  • RS Stock No. 203-9040
  • Mfr. Part No. 300300 PXF-40/4/03-B
Each
MYR2,384.49
ETA Thermal Circuit Breaker - 2 5700 Single Pole 250V Voltage Rating Panel Mount, 15A Current Rating
  • RS Stock No. 729-2760
  • Mfr. Part No. 2-5700-IG2-P10-DD-000040-15A
Each
MYR127.36
RS PRO 3A Violet Blade Car Fuse, 32V dc
  • RS Stock No. 563-740
Each (In a Pack of 10)
MYR2.228
RS PRO PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 767-5052
Each (In a Pack of 10)
MYR1.479
ABB F200 RCCB, 63A, 4 Pole, 30mA, Type A, 110V ac
  • RS Stock No. 177-5072
  • Mfr. Part No. 2CSF204199R1630 F204 A-63/0,03 110V
Each
MYR1,676.92
Littelfuse 6.3A PCB Mount 5 x 20mm Cartridge Fuse Block, 250V
  • RS Stock No. 769-0149
  • Mfr. Part No. 64600001003
Each (In a Pack of 5)
MYR3.268
RS PRO 1.5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6032
Each (In a Pack of 10)
MYR1.89
Siemens 160A Solid Link for LV HRC Fuses
  • RS Stock No. 395-715
  • Mfr. Part No. 3NG1002
Each (In a Pack of 3)
MYR47.85
Bourns 2.5A Resettable Fuse, 30V
  • RS Stock No. 647-8566
  • Mfr. Part No. MF-R250
Each (In a Pack of 10)
MYR2.317
RS PRO MCB, 1P, 2A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0190
Each
MYR48.36
ETI 6A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-642
  • Mfr. Part No. 2312403
Each (In a Pack of 5)
MYR8.168
RS PRO 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9737
Each (In a Pack of 10)
MYR1.949
Weidmuller Electronic Circuit breaker 25mA 24V AMG ELM, 1 channels , DIN Rail Mount
  • RS Stock No. 179-2993
  • Mfr. Part No. 2080410000
Each
MYR248.04
Siemens 25A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-1089
  • Mfr. Part No. 5SE2325
Each (In a Pack of 10)
MYR6.65
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 231-9330
  • Mfr. Part No. 1SDA100354R1 XT5N 400 EkipDip LS/I 400
Each
MYR5,349.13
ABB MISTRAL65 Wall Fixing Brackets
  • RS Stock No. 232-0308
  • Mfr. Part No. 1SL1927A00 MISTRAL
Each
MYR67.76
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