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

2231 / 999+
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 40A
  • RS Stock No. 224-7855
  • Mfr. Part No. 3VA1140-5ED26-0AA0
Each
MYR1,722.86
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-7986
  • Mfr. Part No. C25R46E250
Each
MYR23,952.98
Temporarily out of stock
RS PRO SMD Non-Resettable Surface Mount Fuse 12A, 24V
  • RS Stock No. 252-2190
Each (In a Pack of 50)
MYR0.934
Temporarily out of stock
Siemens SENTRON Long Rear Connector for use with 3VA10/11
  • RS Stock No. 161-435
  • Mfr. Part No. 3VA9111-0QF10
Each
MYR102.71
Temporarily out of stock
Littelfuse Inline Fuse Holder for ATO Fuse, 80V dc
  • RS Stock No. 787-4381P
  • Mfr. Part No. 178.6105.0001
Each (Supplied in a Bag)
MYR28.81
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3783
  • Mfr. Part No. 3VA2040-7KP32-0AA0
Each
MYR9,499.37
Temporarily out of stock
Siemens ALPHA Flange Plate for use with ALPHA DIN Installation Distributor
  • RS Stock No. 272-0352
  • Mfr. Part No. 8GK9100-0KK03
Each
MYR154.30
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA
  • RS Stock No. 210-1647
  • Mfr. Part No. 3VA1125-5EF46-0AA0
Each
MYR2,781.54
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0263
  • Mfr. Part No. 8GK1051-2KK10
Each
MYR2,559.79
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3984
  • Mfr. Part No. 3VA2110-7HN32-0AA0
Each
MYR5,970.72
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-9545
  • Mfr. Part No. C10R46E100
Each
MYR16,769.43
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4674
  • Mfr. Part No. 3VA2140-7KQ42-0AA0
Each
MYR13,215.06
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4810
  • Mfr. Part No. 3VA2563-5MP32-0AA0
Each
MYR15,416.62
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 1P, 125A
  • RS Stock No. 224-7797
  • Mfr. Part No. 3VA1112-3ED16-0AA0
Each
MYR1,664.97
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4747
  • Mfr. Part No. 3VA2163-7HN46-0AA0
Each
MYR6,127.66
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3550
  • Mfr. Part No. 1SDA071530R1
Each
MYR60,123.31
In Stock
Bourns 300A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4123
  • Mfr. Part No. PF-FB1-300
Each (In a Box of 10)
MYR714.803
Temporarily out of stock
ALPHA 630 DIN, Abdeckung Höhe=600mm, Bre
  • RS Stock No. 229-9885
  • Mfr. Part No. 8GK9601-4KK20
Each (In a Pack of 10)
MYR571.083
Temporarily out of stock
Siemens 6A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2042
  • Mfr. Part No. 3NW6001-4
Each (In a Pack of 20)
MYR93.082
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 260-7698
  • Mfr. Part No. C12H4TM125B
Each
MYR6,082.67
1
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