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

2251 / 999+
Temporarily out of stock
Mersen 8A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0550
  • Mfr. Part No. HP6M8
Each (In a Box of 10)
MYR53.545
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 20A
  • RS Stock No. 224-7823
  • Mfr. Part No. 3VA1120-5ED22-0AA0
Each
MYR1,651.63
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9375
  • Mfr. Part No. 3VA1150-6GF46-0AA0
Each
MYR2,389.56
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LSI, 4 channels
  • RS Stock No. 259-4624
  • Mfr. Part No. 1SDA072892R1
Each
MYR42,002.79
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3915
  • Mfr. Part No. 1SDA071952R1
Each
MYR153,553.77
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9471
  • Mfr. Part No. 3VA1196-6GD42-0AA0
Each
MYR2,616.25
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4129
  • Mfr. Part No. 1SDA072240R1
Each
MYR55,482.42
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8251
  • Mfr. Part No. C63V36E630
Each
MYR33,772.05
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LI, 4 channels
  • RS Stock No. 259-4510
  • Mfr. Part No. 1SDA072731R1
Each
MYR20,949.51
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-4101
  • Mfr. Part No. 1SDA072197R1
Each
MYR48,308.02
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-4327
  • Mfr. Part No. 1SDA072491R1
Each
MYR72,854.14
Temporarily out of stock
Siemens 315A size NH3 Square Body Fuse, aR, 440V
  • RS Stock No. 230-2971
  • Mfr. Part No. 3NC3430-6U
Each (In a Pack of 3)
MYR1,644.44
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4614
  • Mfr. Part No. 3VA2140-0MN36-0AA0
Each
MYR5,080.82
In Stock
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 16A Current Rating
  • RS Stock No. 221-5618
  • Mfr. Part No. 3-128-230
Each
MYR91.38
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Touch LSI, 3 channels
  • RS Stock No. 259-3286
  • Mfr. Part No. 1SDA071195R1
Each
MYR91,789.68
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5200
  • Mfr. Part No. 3VA2225-6KP42-0AA0
Each
MYR12,186.97
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-9913
  • Mfr. Part No. 1SDA070760R1
Each
MYR46,107.91
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3562
  • Mfr. Part No. 3VA2010-6KQ32-0AA0
Each
MYR11,185.58
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-3830
  • Mfr. Part No. 1SDA071844R1
Each
MYR142,734.77
In Stock
Bourns Surface Mount Fuse 4A, 65V dc
  • RS Stock No. 245-9223
  • Mfr. Part No. SF-1206F400M-2
Each (On a Tape of 10)
MYR2.778
1
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