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

2280 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3605
  • Mfr. Part No. 3VA2010-8HM42-0AA0
Each
MYR9,484.69
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 50A Curve B, 400V AC, 72V DC
  • RS Stock No. 210-3374
  • Mfr. Part No. 5SL4450-6
Each
MYR1,079.45
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3808
  • Mfr. Part No. 3VA2040-8JP42-0AA0
Each
MYR9,476.24
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LSI, 3 channels
  • RS Stock No. 259-3050
  • Mfr. Part No. 1SDA070905R1
Each
MYR32,059.59
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3034
  • Mfr. Part No. 1SDA070889R1
Each
MYR51,082.29
Temporarily out of stock
Siemens SENTRON Long Rear Connector for use with 3VA53/54, 3VA63/64
  • RS Stock No. 161-419
  • Mfr. Part No. 3VA9473-0QF00
Each
MYR896.66
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4124
  • Mfr. Part No. 1SDA072231R1
Each
MYR31,280.68
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9698
  • Mfr. Part No. 3VA11123FD460AA0
Each
MYR4,246.65
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 50A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9351
  • Mfr. Part No. 3VA1150-3GF42-0AA0
Each
MYR2,192.25
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8240
  • Mfr. Part No. C63S3
Each
MYR17,442.61
Unavailable
Schneider Electric Spacial Cover for use with Spacial SFSpacial SFXSpacial SM
  • RS Stock No. 219-9179
  • Mfr. Part No. NSYBSC630
Each
MYR486.05
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-4177
  • Mfr. Part No. 1SDA072291R1
Each
MYR32,431.33
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0254
  • Mfr. Part No. 8GK1031-4KK10
Each
MYR1,859.62
In Stock
Bourns 0.5A Resettable Fuse, 6V
  • RS Stock No. 692-7633P
  • Mfr. Part No. MF-FSMF050X-2
Each (Supplied on a Reel)
MYR2.096
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-7458
  • Mfr. Part No. C10V36M050
Each
MYR13,058.88
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-4290
  • Mfr. Part No. 1SDA072424R1
Each
MYR63,468.74
Temporarily out of stock
Siemens Circuit Trip
  • RS Stock No. 223-7624
  • Mfr. Part No. 5TT4411-5
Each
MYR328.59
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-3557
  • Mfr. Part No. 1SDA071536R1
Each
MYR43,396.65
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 25A, Fixed Mount
  • RS Stock No. 260-7601
  • Mfr. Part No. C11F4TM025B
Each
MYR3,270.14
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3612
  • Mfr. Part No. 3VA2010-8JP36-0AA0
Each
MYR8,566.85
1
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