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

2281 / 999+
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9508
  • Mfr. Part No. 3VA1510-6EF42-0BG0
Each
MYR40,785.59
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-3614
  • Mfr. Part No. 1SDA071590R1
Each
MYR62,260.67
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4103
  • Mfr. Part No. 3VA2116-7JP46-0AA0
Each
MYR12,517.28
Temporarily out of stock
Siemens 8GK Support for use with ALPHA Distribution Board
  • RS Stock No. 229-9889
  • Mfr. Part No. 8GK9910-0KK05
Each (In a Pack of 20)
MYR16.181
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3901
  • Mfr. Part No. 3VA2063-8JP36-0AA0
Each
MYR8,173.74
Temporarily out of stock
Lovato MCB, 3A, 400V AC
  • RS Stock No. 188-1673
  • Mfr. Part No. P1X1011UH
Each
MYR171.96
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 25 kA
  • RS Stock No. 209-6826
  • Mfr. Part No. 3VA1150-3ED42-0AA0
Each
MYR2,141.06
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-3632
  • Mfr. Part No. 1SDA071607R1
Each
MYR63,468.74
Temporarily out of stock
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4851
  • Mfr. Part No. 3VA2580-6HM42-0AA0
Each
MYR23,588.32
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4230
  • Mfr. Part No. 1SDA072353R1
Each
MYR40,701.81
Temporarily out of stock
Better World
Siemens SENTRON 5SY4 MCB, 1+N, 50A Curve D, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8839
  • Mfr. Part No. 5SY4550-8
Each
MYR697.92
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 260-7500
  • Mfr. Part No. C10W3TM063
Each
MYR6,795.09
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4039
  • Mfr. Part No. 3VA2110-8JQ46-0AA0
Each
MYR11,620.93
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3968
  • Mfr. Part No. 3VA2110-6KQ46-0AA0
Each
MYR11,543.73
Temporarily out of stock
Better World
Siemens SENTRON Terminal for use with 3VA2 160
  • RS Stock No. 269-7114
  • Mfr. Part No. 3VA9164-0JA12
Each (In a Pack of 4)
MYR81.885
Temporarily out of stock
Siemens SENTRON 5SJ MCB, 1P, 3A
  • RS Stock No. 232-2219
  • Mfr. Part No. 5SJ4103-8HG41
Each
MYR314.86
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3703
  • Mfr. Part No. 1SDA071679R1
Each
MYR77,500.53
In Stock
Legrand DX Range DX3 MCB, 3P, 10A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9718
  • Mfr. Part No. 4 078 27
Each
MYR861.36
In Stock
Bourns 160A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4114
  • Mfr. Part No. PF-FB1-160
Each
MYR474.05
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3167
  • Mfr. Part No. 1SDA071028R1
Each
MYR56,778.01
1
2281
2329
Results per page

Related links