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

46578 Products showing for Fuses & Circuit Breakers

296 / 999+
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 20A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2314
  • Mfr. Part No. A9F07220
Each
MYR544.12
Temporarily out of stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 4P, 63A Curve B, 277V AC
  • RS Stock No. 256-6758
  • Mfr. Part No. M9F21463
Each
MYR1,306.64
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 654-621
  • Mfr. Part No. C12B6TM125L
Each
MYR4,505.16
In Stock
Socomec 8A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 252-5313
  • Mfr. Part No. 60120008
Each (In a Pack of 10)
MYR5.86
In Stock
RS PRO 8A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 611-9122
Each (In a Pack of 10)
MYR5.651
Temporarily out of stock
Siemens SENTRON 5SJ4 MCB, 2P, 6A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 212-8855
  • Mfr. Part No. 5SJ4206-7HG42
Each
MYR734.00
In Stock
Wickmann 6.3A PCB Mount Fuse Holder, 250V ac
  • RS Stock No. 110-7900P
  • Mfr. Part No. 56000001009
Each (Supplied in a Box)
MYR2.693
Temporarily out of stock
Hager Thermal Circuit Breaker - HAD 4P Pole Fixed, 30A Current Rating
  • RS Stock No. 602-099
  • Mfr. Part No. HDA430
Each
MYR1,279.37
Temporarily out of stock
ABB S801N MCB, 1P, 6A Curve B, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-844
  • Mfr. Part No. 2CCS891001R0135
Each
MYR387.41
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 216-4804
  • Mfr. Part No. 3VA1225-6EF42-0AA0
Each
MYR7,251.51
In Stock
RS PRO 6.3A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-330
Each (In a Pack of 10)
MYR1.523
Temporarily out of stock
Better World
Schneider Electric Acti9 1 Phase Busbar, 230 V, 400 V, 9mm Pitch
  • RS Stock No. 238-4092
  • Mfr. Part No. A9XPP724
Each (In a Pack of 6)
MYR640.468
Temporarily out of stock
ABB 250 V (Volts), 415 V (Volts) ON-OFF Switch Circuit Trip for use with Push buttons and Indicator Lights
  • RS Stock No. 231-9543
  • Mfr. Part No. 2CCA703005R0001 2F E211-16-20
1 Box of 1
MYR89.72
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 50A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 345-144
  • Mfr. Part No. NHJL36050
Each
MYR9,211.68
In Stock
ABB SMISSLINE TP S400M MCB, 3P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 177-046
  • Mfr. Part No. 2CCS573001R0324 S403M-C32
Each
MYR769.89
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 6A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2443
  • Mfr. Part No. A9F07606
Each
MYR518.28
In Stock
Better World
Schneider Electric iC60 RCD, 63A, 30mA
  • RS Stock No. 776-2929
  • Mfr. Part No. A9V31463
Each
MYR4,687.78
In Stock
Better World
Schneider Electric Multi 9 MCB, 4P, 16A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9138
  • Mfr. Part No. M9F22416
Each
MYR1,068.71
Currently unavailable
Phoenix Contact Surge Protector, 40A, 1000V dc
  • RS Stock No. 509-870
  • Mfr. Part No. 1318523
Each
MYR5,139.36
In Stock
Schurter 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 777-7473
  • Mfr. Part No. 0034.3117
Each (In a Pack of 10)
MYR1.847
1
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