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

46266 Products showing for Fuses & Circuit Breakers

2264 / 999+
Temporarily out of stock
Siemens 20A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6910
  • Mfr. Part No. 3NA6807-6
Each (In a Pack of 3)
MYR259.557
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 3 channels
  • RS Stock No. 259-3274
  • Mfr. Part No. 1SDA071172R1
Each
MYR93,112.21
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA Ekip Hi-Touch LSI, 4 / f channels
  • RS Stock No. 259-3945
  • Mfr. Part No. 1SDA071989R1
Each
MYR228,041.08
Temporarily out of stock
Siemens 63A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 210-6918
  • Mfr. Part No. 3NA7122-6
Each (In a Pack of 3)
MYR342.247
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3129
  • Mfr. Part No. 1SDA070980R1
Each
MYR59,101.17
Last RS stock
Schurter SMD Non Resettable Fuse 1.5A, 32 V ac, 63V dc
  • RS Stock No. 665-7328
  • Mfr. Part No. 3412.0117.22.
Each (In a Pack of 10)
MYR2.957
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3373
  • Mfr. Part No. 1SDA071298R1
Each
MYR237,240.75
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4640
  • Mfr. Part No. 1SDA072913R1
Each
MYR43,489.45
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3962
  • Mfr. Part No. 1SDA072015R1
Each
MYR280,172.68
Temporarily out of stock
Better World
Siemens 5SV3626 RCCB, 63A, 2 Pole, 300mA, Type B, 230V ac
  • RS Stock No. 231-8385
  • Mfr. Part No. 5SV3626-4
Each
MYR4,239.84
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 100/160/250 Circuit Breakers
  • RS Stock No. 260-9342
  • Mfr. Part No. C1035Z100
Each
MYR8,973.84
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3610
  • Mfr. Part No. 3VA2010-8HN46-0AA0
Each
MYR7,205.47
Temporarily out of stock
Siemens SENTRON 5SP3440 MCB, 4P, 40A, Type E
  • RS Stock No. 231-8324
  • Mfr. Part No. 5SP3440-3
Each
MYR4,077.71
In Stock
Bourns Thermal Fuse +77°C 60 A, 28V
  • RS Stock No. 258-6351
  • Mfr. Part No. AC77ABD
Each (In a Bag of 1000)
MYR4.708
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3605
  • Mfr. Part No. 3VA2010-8HM42-0AA0
Each
MYR9,484.69
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 50A Curve B, 400V AC, 72V DC
  • RS Stock No. 210-3374
  • Mfr. Part No. 5SL4450-6
Each
MYR1,079.45
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3808
  • Mfr. Part No. 3VA2040-8JP42-0AA0
Each
MYR9,476.24
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LSI, 3 channels
  • RS Stock No. 259-3050
  • Mfr. Part No. 1SDA070905R1
Each
MYR32,059.59
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3034
  • Mfr. Part No. 1SDA070889R1
Each
MYR51,082.29
Temporarily out of stock
Siemens SENTRON Long Rear Connector for use with 3VA53/54, 3VA63/64
  • RS Stock No. 161-419
  • Mfr. Part No. 3VA9473-0QF00
Each
MYR896.66
1
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