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

2223 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3986
  • Mfr. Part No. 3VA2110-7HN42-0AA0
Each
MYR7,078.86
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 4 channels
  • RS Stock No. 259-3732
  • Mfr. Part No. 1SDA071708R1
Each
MYR90,789.04
Temporarily out of stock
Eaton xEffect MCB, 1P, 3.5A Curve D
  • RS Stock No. 230-1031
  • Mfr. Part No. 177487 FAZ6-D3,5/1
Each
MYR170.57
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9574
  • Mfr. Part No. 3VA10253ED420AA0
Each
MYR1,954.44
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-4057
  • Mfr. Part No. 1SDA072139R1
Each
MYR36,446.30
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-3349
  • Mfr. Part No. 1SDA071264R1
Each
MYR166,338.07
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 250A Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3389
  • Mfr. Part No. 1SDA071322R1
Each
MYR35,202.66
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-4600
  • Mfr. Part No. 1SDA072859R1
Each
MYR51,177.87
Temporarily out of stock
Siemens ALPHA Mounting Kit for use with Distribution boards
  • RS Stock No. 210-9445
  • Mfr. Part No. 8GB5013-5KM
Each
MYR97.57
In Stock
Bourns 63A Tag Fuse, 66mm, 500/600V ac, 24.1mm
  • RS Stock No. 254-4161
  • Mfr. Part No. PF-GT3-63
Each
MYR95.98
In Stock
Eaton xEffect MCB, 3+N, 8A Curve C
  • RS Stock No. 230-0982
  • Mfr. Part No. 177466 FAZ6-C8/3N
Each
MYR318.88
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Touch LSI, 3 channels
  • RS Stock No. 259-4403
  • Mfr. Part No. 1SDA072585R1
Each
MYR128,985.71
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3692
  • Mfr. Part No. 3VA2025-7KQ42-0AA0
Each
MYR13,433.96
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4021
  • Mfr. Part No. 3VA2110-8HL46-0AA0
Each
MYR6,539.54
In Stock
RS PRO 8A aR Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 199-250
1 Pack of 10
MYR1,116.50
Temporarily out of stock
Lovato MCB, 3P, 1A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 188-1652
  • Mfr. Part No. P1MBUH3PC01
Each
MYR965.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 70 kA
  • RS Stock No. 209-6838
  • Mfr. Part No. 3VA1150-6EF46-0AA0
Each
MYR2,619.15
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4649
  • Mfr. Part No. 3VA2140-7HL36-0AA0
Each
MYR4,937.92
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 3P, 12.5A
  • RS Stock No. 224-7895
  • Mfr. Part No. 3VA1192-5MG36-0AA0
Each
MYR2,113.83
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4127
  • Mfr. Part No. 3VA2116-8HN32-0AA0
Each
MYR7,857.78
1
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