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

2288 / 999+
Temporarily out of stock
Siemens SENTRON Connecting Terminals for use with Busbar System
  • RS Stock No. 211-3854
  • Mfr. Part No. 8US1921-2AB01
Each (In a Pack of 15)
MYR22.362
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-8040
  • Mfr. Part No. C25W36E160
Each
MYR23,663.42
Temporarily out of stock
Better World
Siemens SENTRON 5SV6 MCB, 2P, 16A
  • RS Stock No. 226-0807
  • Mfr. Part No. 5SV6016-7GV16
Each (In a Pack of 12)
MYR1,050.917
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3132
  • Mfr. Part No. 1SDA070983R1
Each
MYR32,431.33
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 32A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9905
  • Mfr. Part No. 3VA1132-6GD46-0AA0
Each
MYR1,985.15
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4029
  • Mfr. Part No. 1SDA072100R1
Each
MYR38,263.70
Temporarily out of stock
Siemens 50A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 210-6917
  • Mfr. Part No. 3NA7120-6
Each (In a Pack of 3)
MYR342.247
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2678
  • Mfr. Part No. 1069191
Each
MYR354.65
In Stock
Bourns 70A Tag Fuse, 38mm, 240 V ac, 150V dc, 24.1mm
  • RS Stock No. 254-4216
  • Mfr. Part No. PF-MB1-70
Each
MYR262.92
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 16A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9458
  • Mfr. Part No. 3VA1196-4GD46-0AA0
Each
MYR2,450.18
In Stock
Bourns 60A Tag Fuse, 66mm, 170V dc, 24.1mm
  • RS Stock No. 254-4224
  • Mfr. Part No. PF-NT2-60
Each (In a Box of 10)
MYR111.122
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7733
  • Mfr. Part No. C16B3
Each
MYR2,577.75
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3834
  • Mfr. Part No. 1SDA071848R1
Each
MYR162,621.06
Temporarily out of stock
Siemens, SENTRON MCCB 4P 1.25kA, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4880
  • Mfr. Part No. 3VA2612-5JP42-0AA0
Each
MYR48,508.41
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3825
  • Mfr. Part No. 1SDA071840R1
Each
MYR160,019.03
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 400A, Fixed Mount
  • RS Stock No. 260-8174
  • Mfr. Part No. C40W45E400
Each
MYR34,789.06
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3885
  • Mfr. Part No. 3VA2063-7KQ42-0AA0
Each
MYR13,433.96
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-3049
  • Mfr. Part No. 1SDA070904R1
Each
MYR30,015.22
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 500A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 270-3511
  • Mfr. Part No. 3VA1450-6FF42-0AA0
Each
MYR18,886.24
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-4442
  • Mfr. Part No. 1SDA072641R1
Each
MYR230,364.05
1
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