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

2230 / 999+
ABB Emax2 Electronic Circuit Breaker 800A Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3456
  • Mfr. Part No. 1SDA071398R1
Each
MYR52,995.40
RS PRO SMD Non-Resettable Surface Mount Fuse 15A, 24V
  • RS Stock No. 252-2192
Each (In a Pack of 50)
MYR1.051
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 36 kA
  • RS Stock No. 209-6998
  • Mfr. Part No. 3VA1150-4EF32-0AA0
Each
MYR1,839.83
Better World
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-3293
  • Mfr. Part No. 1SDA071202R1
Each
MYR105,843.04
Siemens ALPHA Distribution Board
  • RS Stock No. 218-1887
  • Mfr. Part No. 8GB5003-5KM
Each
MYR319.55
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4557
  • Mfr. Part No. 3VA2125-7HM36-0AA0
Each
MYR6,316.00
Better World
Siemens, SENTRON MCCB 4P 500A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3516
  • Mfr. Part No. 3VA1450-7FF42-0AA0
Each
MYR20,291.44
Mersen 40A Bolted Tag Fuse, A4C, 240 V dc, 415V ac, 94mm
  • RS Stock No. 178-1037
  • Mfr. Part No. Z1045280 / BTCP42V40/10
Each (In a Pack of 10)
MYR101.248
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3558
  • Mfr. Part No. 3VA2010-6JQ36-0AA0
Each
MYR10,511.08
ABB MCCB Molded Case Circuit Breaker 4P 630A, Fixed Mount
  • RS Stock No. 250-4140
  • Mfr. Part No. 1SDA054410R1
Each
MYR21,069.59
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 50A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9355
  • Mfr. Part No. 3VA1150-4ED46-0AA0
Each
MYR2,450.18
Better World
Siemens SENTRON 3VA1 MCB, 1P, 25A
  • RS Stock No. 224-7831
  • Mfr. Part No. 3VA1125-4ED16-0AA0
Each
MYR892.77
Siemens SENTRON Wire Connector for use with 3VA1 250
  • RS Stock No. 210-9322
  • Mfr. Part No. 3VA9213-0JF60
Each
MYR753.25
Better World
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3048
  • Mfr. Part No. 1SDA070903R1
Each
MYR34,754.56
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4482
  • Mfr. Part No. 1SDA072690R1
Each
MYR41,229.21
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3533
  • Mfr. Part No. 1SDA071510R1
Each
MYR57,873.97
Siemens SENTRON Wire Connector for use with 3VA2 100/160/250
  • RS Stock No. 210-9366
  • Mfr. Part No. 3VA9264-0QC00
Each
MYR633.53
Better World
Siemens, SENTRON MCCB 4P 630A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3526
  • Mfr. Part No. 3VA1463-5GF42-0AA0
Each
MYR13,226.31
Better World
Siemens SENTRON 3VA1 MCB, 2P, 25A
  • RS Stock No. 224-7836
  • Mfr. Part No. 3VA1125-5ED26-0AA0
Each
MYR1,908.12
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-3171
  • Mfr. Part No. 1SDA071034R1
Each
MYR39,772.49
1
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