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

2224 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4127
  • Mfr. Part No. 3VA2116-8HN32-0AA0
Each
MYR7,857.78
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4544
  • Mfr. Part No. 3VA2125-6KQ42-0AA0
Each
MYR10,832.27
Temporarily out of stock
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4863
  • Mfr. Part No. 3VA2580-7HN42-0AA0
Each
MYR31,701.88
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA
  • RS Stock No. 209-6920
  • Mfr. Part No. 3VA2125-5HN46-0AA0
Each
MYR4,830.71
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4658
  • Mfr. Part No. 3VA2140-7HN42-0AA0
Each
MYR5,889.41
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with Modular Installation Devices
  • RS Stock No. 269-8399
  • Mfr. Part No. 8GK4001-5KK22
Each
MYR1,906.98
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3523
  • Mfr. Part No. 1SDA071500R1
Each
MYR55,865.12
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9483
  • Mfr. Part No. 3VA1220-6FF42-0AA0
Each
MYR6,320.78
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 2P, 13A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6470
  • Mfr. Part No. 5SL4213-8
Each
MYR470.62
Temporarily out of stock
RS PRO 100A Slotted Tag Fuse, 17.4 x 42mm, 240V, 42mm
  • RS Stock No. 188-4505
Each (In a Box of 200)
MYR114.773
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4833
  • Mfr. Part No. 3VA2563-7MP32-0AA0
Each
MYR24,507.18
Temporarily out of stock
Better World
Schneider Electric Acti9 iIG40K RCCB, 40A, 3+N Pole, 300mA, Type AC, 380 → 415V ac
  • RS Stock No. 238-3478
  • Mfr. Part No. A9R79740
Each
MYR1,874.57
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 80A, Fixed Mount
  • RS Stock No. 260-9528
  • Mfr. Part No. C10R36M080
Each
MYR12,205.36
Temporarily out of stock
Siemens 40A NH Fuse, NH1, 440 - 500V ac/dc
  • RS Stock No. 269-8316
  • Mfr. Part No. 3NA7117
Each (In a Pack of 3)
MYR80.387
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4320
  • Mfr. Part No. 1SDA072474R1
Each
MYR80,102.52
Temporarily out of stock
Schneider Electric, Compact MCCB 3P 1.25kA, Fixed Mount
  • RS Stock No. 247-1782
  • Mfr. Part No. 33351
Each
MYR15,349.65
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4497
  • Mfr. Part No. 3VA2125-0HL42-0AA0
Each
MYR6,827.01
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 3P, 40A
  • RS Stock No. 224-7858
  • Mfr. Part No. 3VA1140-5MH36-0AA0
Each
MYR2,112.68
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-4426
  • Mfr. Part No. 1SDA072618R1
Each
MYR175,444.68
Temporarily out of stock
Better World
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9379
  • Mfr. Part No. 3VA9383-0JB13
Each
MYR694.66
1
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