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

2225 / 999+
Temporarily out of stock
Better World
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9379
  • Mfr. Part No. 3VA9383-0JB13
Each
MYR694.66
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 85 kA
  • RS Stock No. 209-7085
  • Mfr. Part No. 3VA2580-6HL42-0AA0
Each
MYR20,935.14
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3790
  • Mfr. Part No. 3VA2040-7KQ42-0AA0
Each
MYR13,433.96
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 4P, 63A Curve B
  • RS Stock No. 216-6024
  • Mfr. Part No. 5SY7463-6
Each
MYR1,364.37
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9678
  • Mfr. Part No. 3VA11105GE460AA0
Each
MYR3,381.52
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4539
  • Mfr. Part No. 3VA2125-6JQ36-0AA0
Each
MYR9,342.52
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4613
  • Mfr. Part No. 3VA2140-0MN32-0AA0
Each
MYR4,836.39
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9691
  • Mfr. Part No. 3VA11106GF420AA0
Each
MYR2,874.26
Temporarily out of stock
ABB 80A Tag Fuse, 125 x 30 x 60mm, 500V
  • RS Stock No. 251-3449
  • Mfr. Part No. 1SCA022627R2870
1 Box of 3
MYR198.07
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7753
  • Mfr. Part No. C16F34V100
Each
MYR13,044.34
Temporarily out of stock
Siemens 40A Cartridge Fuse
  • RS Stock No. 210-6998
  • Mfr. Part No. 3NW6117-1
Each (In a Pack of 10)
MYR28.818
Temporarily out of stock
Siemens 100A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 203-2144
  • Mfr. Part No. 3NA6130
Each (In a Pack of 3)
MYR132.433
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7778
  • Mfr. Part No. C16H3MA100
Each
MYR5,427.89
Temporarily out of stock
Bourns 40A Tag Fuse, 66mm, 500V ac, 24.1mm
  • RS Stock No. 254-4194
  • Mfr. Part No. PF-JT3-40
Each (In a Box of 80)
MYR78.334
Temporarily out of stock
ALPHA 630 DIN, Abdeckung Höhe=600mm, Bre
  • RS Stock No. 229-9883
  • Mfr. Part No. 8GK9601-4KK10
Each (In a Pack of 10)
MYR468.506
In Stock
Bourns 0.25A Resettable Fuse, 60V
  • RS Stock No. 647-8443P
  • Mfr. Part No. MF-R025
Each (Supplied in a Bag)
MYR2.198
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4725
  • Mfr. Part No. 3VA2163-6JQ36-0AA0
Each
MYR9,342.52
Temporarily out of stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 24A Curve D, 400V AC
  • RS Stock No. 238-3387
  • Mfr. Part No. A9P32325
Each
MYR890.16
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3899
  • Mfr. Part No. 3VA2063-8HN46-0AA0
Each
MYR6,625.12
Temporarily out of stock
Schurter SMD Non Resettable Fuse 5A, 32V ac/dc
  • RS Stock No. 188-4583
  • Mfr. Part No. 3-103-130
Each (On a Tape of 5)
MYR18.068
1
2225
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