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

2268 / 999+
Temporarily out of stock
Siemens 400V ac Push Button
  • RS Stock No. 231-8409
  • Mfr. Part No. 5TE4801-2
Each
MYR378.08
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3821
  • Mfr. Part No. 3VA2040-8KQ42-0AA0
Each
MYR11,934.26
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4608
  • Mfr. Part No. 3VA2140-0KP46-0AA0
Each
MYR11,755.60
Last RS stock
Mersen 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 816-8959
  • Mfr. Part No. R090543
Each (In a Pack of 10)
MYR2.806
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3589
  • Mfr. Part No. 3VA2010-7KP32-0AA0
Each
MYR10,117.58
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX630 Circuit Breakers
  • RS Stock No. 260-8178
  • Mfr. Part No. C6334V570
Each
MYR18,970.14
In Stock
Siemens SENTRON Cover for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9401
  • Mfr. Part No. 3VA9481-0WD30
Each
MYR230.81
Temporarily out of stock
Siemens SENTRON 5SP3716 MCB, 1P, 16A, Type E
  • RS Stock No. 231-8330
  • Mfr. Part No. 5SP3716-2KK03
Each
MYR613.47
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9840
  • Mfr. Part No. 3VA1120-6GF42-0AA0
Each
MYR3,290.29
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with Modular Installation Devices
  • RS Stock No. 269-8398
  • Mfr. Part No. 8GK4001-5KK11
Each
MYR1,115.58
Temporarily out of stock
Socomec 80A Tag Fuse, NH00, 1kV
  • RS Stock No. 252-5301
  • Mfr. Part No. 170M2680
Each (In a Pack of 6)
MYR418.693
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 36 kA
  • RS Stock No. 210-1610
  • Mfr. Part No. 3VA1110-4ED32-0AA0
Each
MYR2,352.17
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-7930
  • Mfr. Part No. C25L4
Each
MYR12,167.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9660
  • Mfr. Part No. 3VA11104FE460AA0
Each
MYR3,106.39
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3008
  • Mfr. Part No. 1SDA070847R1
Each
MYR48,594.99
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4525
  • Mfr. Part No. 3VA2125-6HK32-0AA0
Each
MYR3,994.61
Temporarily out of stock
Eaton xEffect MCB, 2P, 40A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4457
  • Mfr. Part No. 239092 FAZ6-B40/2
Each
MYR363.08
Temporarily out of stock
Lovato MCB, 1P, 10A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 188-1635
  • Mfr. Part No. P1MBUH1PC10
Each
MYR284.46
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 20A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9567
  • Mfr. Part No. 3VA10204ED360AA0
Each
MYR1,705.11
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3561
  • Mfr. Part No. 3VA2010-6JQ46-0AA0
Each
MYR12,365.96
1
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