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

2294 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9456
  • Mfr. Part No. 3VA1196-4ED46-0AA0
Each
MYR2,450.18
Temporarily out of stock
Schurter SMD Non Resettable Fuse 2.5A, 125V ac/dc
  • RS Stock No. 188-4472
  • Mfr. Part No. 3-103-118
Each (On a Reel of 750)
MYR17.667
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3624
  • Mfr. Part No. 3VA2010-8KP46-0AA0
Each
MYR11,680.21
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4632
  • Mfr. Part No. 3VA2140-6JP32-0AA0
Each
MYR7,339.20
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 4P, 50A
  • RS Stock No. 224-7865
  • Mfr. Part No. 3VA1150-4GF42-0AA0
Each
MYR2,389.95
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3844
  • Mfr. Part No. 1SDA071856R1
Each
MYR176,188.20
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3693
  • Mfr. Part No. 3VA2025-7KQ46-0AA0
Each
MYR13,658.78
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 25A, Fixed Mount
  • RS Stock No. 260-9526
  • Mfr. Part No. C10R36M025
Each
MYR12,178.68
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4606
  • Mfr. Part No. 1SDA072874R1
Each
MYR34,475.77
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA1 250
  • RS Stock No. 269-7121
  • Mfr. Part No. 3VA9214-0JC13
Each (In a Pack of 4)
MYR169.41
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9430
  • Mfr. Part No. 3VA1180-5GE42-0AA0
Each
MYR2,736.73
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-3371
  • Mfr. Part No. 1SDA071296R1
Each
MYR222,930.15
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3807
  • Mfr. Part No. 3VA2440-5KP32-0AA0
Each
MYR15,191.15
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 630A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 272-0171
  • Mfr. Part No. 3VA1563-5EF42-0AA0
Each
MYR13,681.47
Temporarily out of stock
Siemens 24V ac Circuit Trip
  • RS Stock No. 223-7647
  • Mfr. Part No. 5TT4454-2
Each
MYR712.82
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 1P, 32A
  • RS Stock No. 224-7840
  • Mfr. Part No. 3VA1132-4ED16-0AA0
Each
MYR892.77
Temporarily out of stock
Eaton 20A Bolted Tag Fuse, F2, 550V ac
  • RS Stock No. 181-8516
  • Mfr. Part No. ESD20
1 Box of 20
MYR607.72
Temporarily out of stock
Better World
Siemens, 3VA1 MCCB 3P 96A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-3329
  • Mfr. Part No. 3VA1120-5ED32-0AA0
Each
MYR1,811.69
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 100A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9654
  • Mfr. Part No. 3VA11104ED120AA0
Each
MYR1,094.75
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 55 kA
  • RS Stock No. 209-6763
  • Mfr. Part No. 3VA1116-5EE46-0AA0
Each
MYR5,964.16
1
2294
2329
Results per page

Related links