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

2289 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4761
  • Mfr. Part No. 3VA2163-7KQ36-0AA0
Each
MYR12,456.08
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-3205
  • Mfr. Part No. 1SDA071073R1
Each
MYR62,818.19
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Hi-Touch LSI, 4 / f channels
  • RS Stock No. 259-3967
  • Mfr. Part No. 1SDA072019R1
Each
MYR303,125.45
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 3+N, 1A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8901
  • Mfr. Part No. 5SY6601-7
Each
MYR829.42
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-4592
  • Mfr. Part No. 1SDA072850R1
Each
MYR51,943.08
Temporarily out of stock
ABB 6A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 250-4354
  • Mfr. Part No. 1SCA022652R0520
1 Box of 3
MYR162.53
Temporarily out of stock
Lovato P1 MCB, 1+N, 25A Curve C, 230V AC
  • RS Stock No. 248-5618
  • Mfr. Part No. P1MB1MC25
Each
MYR305.17
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4659
  • Mfr. Part No. 1SDA072930R1
Each
MYR65,234.24
Temporarily out of stock
Better World
Eaton 160A Tag Fuse, 19.13 x 5.92 x 5.92mm, 1kV, 167mm
  • RS Stock No. 282-6225
  • Mfr. Part No. PV-160A-2XL-B
Each
MYR2,301.71
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3780
  • Mfr. Part No. 3VA2040-7JQ36-0AA0
Each
MYR10,848.41
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 2P, 50A Curve B, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-9015
  • Mfr. Part No. 5SY6250-6
Each
MYR518.11
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4545
  • Mfr. Part No. 3VA2125-6KQ46-0AA0
Each
MYR13,298.47
Temporarily out of stock
Eaton 30A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 480V
  • RS Stock No. 225-8216
  • Mfr. Part No. BK-HVP-HH-R
1 Bag of 100
MYR3,794.47
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9448
  • Mfr. Part No. 3VA1196-3GD46-0AA0
Each
MYR2,272.48
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9465
  • Mfr. Part No. 3VA1196-5GD42-0AA0
Each
MYR2,438.74
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4690
  • Mfr. Part No. 3VA2163-0HM42-0AA0
Each
MYR8,466.41
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4244
  • Mfr. Part No. 1SDA072369R1
Each
MYR59,658.64
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4584
  • Mfr. Part No. 3VA2125-7MN36-0AA0
Each
MYR4,761.90
Temporarily out of stock
Better World
Siemens RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8759
  • Mfr. Part No. 5SU1354-7LB20
Each
MYR1,654.16
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 500mA Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6540
  • Mfr. Part No. 5SL4605-8
Each
MYR963.83
1
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