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

2277 / 999+
ABB Emax2 Electronic Circuit Breaker 800A Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-4519
  • Mfr. Part No. 1SDA072747R1
Each
MYR53,569.23
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-3736
  • Mfr. Part No. 3VA1140-4EF46-0AA0
Each
MYR2,853.58
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3724
  • Mfr. Part No. 3VA2025-8KQ46-0AA0
Each
MYR12,132.19
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-3029
  • Mfr. Part No. 1SDA070881R1
Each
MYR28,315.23
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3676
  • Mfr. Part No. 1SDA071650R1
Each
MYR70,716.84
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-4679
  • Mfr. Part No. 1SDA072956R1
Each
MYR47,206.66
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4551
  • Mfr. Part No. 3VA2125-7HL32-0AA0
Each
MYR4,249.41
Mersen 25A Slotted Tag Fuse, A1, 250 V dc, 550V ac, 44.5mm
  • RS Stock No. 178-1001
  • Mfr. Part No. R1019237 / BNIT55V25M32
Each (In a Pack of 10)
MYR26.85
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4764
  • Mfr. Part No. 3VA2163-7MN32-0AA0
Each
MYR5,088.69
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 70 kA
  • RS Stock No. 210-1615
  • Mfr. Part No. 3VA1110-6EE42-0AA0
Each
MYR2,632.22
ABB RCBO, 50A Current Rating, 1P Poles, Type B
  • RS Stock No. 237-5231
  • Mfr. Part No. 2CSR275051R0505
Each
MYR958.57
Better World
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-3194
  • Mfr. Part No. 1SDA071059R1
Each
MYR70,252.30
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4407
  • Mfr. Part No. 1SDA072588R1
Each
MYR149,264.10
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 211-3729
  • Mfr. Part No. 3VA1125-6ED42-0AA0
Each
MYR1,933.81
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3148
  • Mfr. Part No. 1SDA071003R1
Each
MYR37,728.12
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3279
  • Mfr. Part No. 1SDA071177R1
Each
MYR116,994.23
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4474
  • Mfr. Part No. 1SDA072682R1
Each
MYR20,279.97
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4061
  • Mfr. Part No. 1SDA072143R1
Each
MYR21,045.11
Phoenix Contact CB-E1 Electronic Circuit breaker 4A 24V CB E1, On Base Element
  • RS Stock No. 217-6385
  • Mfr. Part No. 2800918
Each
MYR255.26
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-3459
  • Mfr. Part No. 1SDA071412R1
Each
MYR30,993.58
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