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

2273 / 999+
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 16 kA, Fixed Mount
  • RS Stock No. 271-9562
  • Mfr. Part No. 3VA10202ED420AA0
Each
MYR1,917.12
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100/160/250
  • RS Stock No. 260-9393
  • Mfr. Part No. C104TM100
Each
MYR1,612.23
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3665
  • Mfr. Part No. 1SDA071638R1
Each
MYR61,610.08
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7481
  • Mfr. Part No. C10V4TM100
Each
MYR8,339.07
Better World
Siemens SENTRON 3VA1 MCB, 2P, 40A
  • RS Stock No. 224-7854
  • Mfr. Part No. 3VA1140-5ED22-0AA0
Each
MYR1,651.63
Eaton xEffect MCB, 3+N, 5A Curve B
  • RS Stock No. 230-0919
  • Mfr. Part No. 177454 FAZ6-B5/3N
Each
MYR400.38
Mersen 8A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0587
  • Mfr. Part No. HP6M8
Each
MYR44.11
Better World
ABB Emax2 Electronic Circuit Breaker 800A Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3044
  • Mfr. Part No. 1SDA070899R1
Each
MYR49,529.70
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4588
  • Mfr. Part No. 3VA2125-7MQ36-0AA0
Each
MYR8,979.38
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3107
  • Mfr. Part No. 1SDA070960R1
Each
MYR53,990.18
Eaton xEffect MCB, 1+N, 500mA Curve C
  • RS Stock No. 230-0934
  • Mfr. Part No. 239054 FAZ6-C0,5/1N
Each
MYR269.65
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3582
  • Mfr. Part No. 3VA2010-7JP42-0AA0
Each
MYR11,241.75
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4635
  • Mfr. Part No. 1SDA072908R1
Each
MYR53,804.38
RS PRO SMD Non-Resettable Surface Mount Fuse 15A, 24V
  • RS Stock No. 252-2149
Each (In a Pack of 50)
MYR1.094
Contactum 16 Way Steel Consumer Unit, 100A Defender
  • RS Stock No. 184-9108
  • Mfr. Part No. DD161MS
Each
MYR614.46
Better World
Siemens SENTRON 5SV6 Fire Safety Circuit Breaker, 1+N, 6A Curve B, 1 A Breaking Capacity
  • RS Stock No. 199-5118
  • Mfr. Part No. 5SV6016-6KP06
Each
MYR1,094.03
Schurter SMD Non Resettable Fuse 5A, 125 V dc, 250V ac
  • RS Stock No. 173-8120
  • Mfr. Part No. 3403.0173.24
1 Reel of 2000
MYR5,900.40
ABB Emax2 Electronic Circuit Breaker 1kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3604
  • Mfr. Part No. 1SDA071580R1
Each
MYR66,814.02
Better World
Schneider Electric, Compact MCCB 4P 125A, Breaking Capacity 50 kA, DIN Rail Mount
  • RS Stock No. 178-8253
  • Mfr. Part No. LV426418
Each
MYR4,410.89
Siemens ALPHA Terminal Block for use with Sentron
  • RS Stock No. 236-8559
  • Mfr. Part No. 8WH9141-0BC01
Each
MYR6.05
1
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