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

2250 / 999+
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-3146
  • Mfr. Part No. 1SDA071001R1
Each
MYR32,710.12
Temporarily out of stock
Better World
Siemens SENTRON 5SV6 Fire Safety Circuit Breaker, 1+N, 13A Curve C, 1 A Breaking Capacity
  • RS Stock No. 199-5125
  • Mfr. Part No. 5SV6016-7KP13
Each
MYR1,082.26
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0265
  • Mfr. Part No. 8GK1051-2KK30
Each
MYR6,026.53
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3910
  • Mfr. Part No. 3VA2063-8KP36-0AA0
Each
MYR9,733.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4713
  • Mfr. Part No. 3VA2163-6HK36-0AA0
Each
MYR4,174.67
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-3234
  • Mfr. Part No. 1SDA071122R1
Each
MYR75,549.17
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 8A Curve K, 240V AC
  • RS Stock No. 246-2540
  • Mfr. Part No. 2CCS571103R8407
Each
MYR577.09
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 36 kA
  • RS Stock No. 210-1657
  • Mfr. Part No. 3VA1140-4EE42-0AA0
Each
MYR2,455.23
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 70 kA
  • RS Stock No. 209-6790
  • Mfr. Part No. 3VA1125-6EE46-0AA0
Each
MYR2,304.84
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9750
  • Mfr. Part No. 3VA1112-6GF46-0AA0
Each
MYR4,624.95
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 4A, 125V ac
  • RS Stock No. 895-1612
  • Mfr. Part No. 0473004.MRT1L
Each (In a Pack of 10)
MYR7.385
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3748
  • Mfr. Part No. 3VA2040-6JP36-0AA0
Each
MYR8,150.33
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 500A, Breaking Capacity 55 kA
  • RS Stock No. 209-6945
  • Mfr. Part No. 3VA2450-5KP42-0AA0
Each
MYR19,381.87
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3891
  • Mfr. Part No. 3VA2063-8HM32-0AA0
Each
MYR7,419.61
In Stock
Schurter SMD Non Resettable Fuse 2A, 125V ac/dc
  • RS Stock No. 173-9883
  • Mfr. Part No. 7010.9963.63
Each (In a Bag of 100)
MYR5.719
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4408
  • Mfr. Part No. 1SDA072589R1
Each
MYR152,788.29
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4033
  • Mfr. Part No. 3VA2110-8JP42-0AA0
Each
MYR9,673.31
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 250mA, 250V ac
  • RS Stock No. 767-5193
Each (In a Pack of 10)
MYR2.505
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3930
  • Mfr. Part No. 3VA2110-0HN46-0AA0
Each
MYR10,183.68
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3784
  • Mfr. Part No. 3VA2040-7KP36-0AA0
Each
MYR9,724.18
1
2250
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