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

2232 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4729
  • Mfr. Part No. 3VA2163-6KQ36-0AA0
Each
MYR10,053.93
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9340
  • Mfr. Part No. 3VA1140-6GE42-0AA0
Each
MYR2,873.27
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-4610
  • Mfr. Part No. 1SDA072880R1
Each
MYR58,915.39
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4088
  • Mfr. Part No. 3VA2116-7HL36-0AA0
Each
MYR7,619.93
Temporarily out of stock
Siemens, SENTRON MCCB 4P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-340
  • Mfr. Part No. 3VA6560-5HN46-2AA0
Each
MYR29,494.67
Temporarily out of stock
ABB RCBO, 50A Current Rating, 4P Poles, Type K
  • RS Stock No. 237-5128
  • Mfr. Part No. 2CSR254101R1507
Each
MYR4,197.67
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9391
  • Mfr. Part No. 3VA1163-4GE46-0AA0
Each
MYR2,498.93
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 250A Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-9870
  • Mfr. Part No. 1SDA070700R1
Each
MYR51,273.53
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3695
  • Mfr. Part No. 3VA2025-8HL32-0AA0
Each
MYR4,662.87
Temporarily out of stock
Better World
Siemens SENTRON 5SY8 MCB, 3P, 13A Curve D
  • RS Stock No. 236-8436
  • Mfr. Part No. 5SY8313-8
Each
MYR910.94
Temporarily out of stock
Better World
Siemens, 3VA2 MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 210-3344
  • Mfr. Part No. 3VA2163-6HL36-0AA0
Each
MYR4,222.09
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4410
  • Mfr. Part No. 1SDA072591R1
Each
MYR150,771.40
Currently unavailable
Schurter PC Board Non Resettable Fuse, Axial 1A, 125V ac/dc
  • RS Stock No. 167-6260
  • Mfr. Part No. 7010.6360.13
Each (In a Pack of 5)
MYR10.574
In Stock
Phoenix Contact Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 1A Current Rating
  • RS Stock No. 217-6361
  • Mfr. Part No. 2800858
Each
MYR214.08
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3971
  • Mfr. Part No. 1SDA072023R1
Each
MYR331,560.87
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 500A, Fixed Mount
  • RS Stock No. 260-8231
  • Mfr. Part No. C63R31M500
Each
MYR21,830.33
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3644
  • Mfr. Part No. 1SDA071618R1
Each
MYR55,012.49
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7564
  • Mfr. Part No. C11E3TM100B
Each
MYR2,116.45
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 3P, 63A
  • RS Stock No. 224-7880
  • Mfr. Part No. 3VA1163-5MH36-0AA0
Each
MYR2,112.68
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3716
  • Mfr. Part No. 3VA2025-8KP32-0AA0
Each
MYR9,604.66
1
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