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

2301 / 999+
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-9519
  • Mfr. Part No. C10R32M050
Each
MYR6,793.06
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3930
  • Mfr. Part No. 1SDA071966R1
Each
MYR197,427.50
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 70 kA
  • RS Stock No. 210-1654
  • Mfr. Part No. 3VA1132-6ED42-0AA0
Each
MYR1,836.82
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9509
  • Mfr. Part No. 3VA1510-6GF42-0AA0
Each
MYR39,300.46
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3700
  • Mfr. Part No. 3VA2025-8HM36-0AA0
Each
MYR6,625.12
Last RS stock
Schurter PC Board Non Resettable Fuse, Axial 500mA, 125V ac/dc
  • RS Stock No. 110-8470
  • Mfr. Part No. 7010.7050.13
Each (In a Pack of 5)
MYR6.432
Temporarily out of stock
Siemens SENTRON 5SP3416 MCB, 4P, 16A, Type E
  • RS Stock No. 231-8320
  • Mfr. Part No. 5SP3416-3
Each
MYR3,771.91
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 260-7651
  • Mfr. Part No. C11N3TM063B
Each
MYR3,248.41
Temporarily out of stock
Better World
Siemens SENTRON Wire Connector for use with 3VA5
  • RS Stock No. 269-7097
  • Mfr. Part No. 3VA9134-0JB11
Each (In a Pack of 4)
MYR47.84
Temporarily out of stock
ABB RCBO, 50A Current Rating, 2P Poles, Type B
  • RS Stock No. 237-5047
  • Mfr. Part No. 2CSR252001R1505
Each
MYR1,544.07
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA
  • RS Stock No. 209-6850
  • Mfr. Part No. 3VA1163-5EE46-0AA0
Each
MYR2,722.42
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 13A Curve B, 400V AC
  • RS Stock No. 246-2568
  • Mfr. Part No. 2CCS572001R0135
Each
MYR375.31
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-209
  • Mfr. Part No. 3VA2140-8HL36-0AA0
Each
MYR5,423.20
Temporarily out of stock
Bourns 80A Tag Fuse, 38mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4234
  • Mfr. Part No. PF-NT5-80
Each (In a Box of 10)
MYR124.308
Temporarily out of stock
Better World
ABB, XT4H MCCB 3P 160A, Fixed Mount
  • RS Stock No. 236-6673
  • Mfr. Part No. 1SDA068291R1 XT4H 160 BLOC FF
Each
MYR2,817.08
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3083
  • Mfr. Part No. 1SDA070937R1
Each
MYR51,016.42
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4644
  • Mfr. Part No. 1SDA072916R1
Each
MYR44,047.16
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-3175
  • Mfr. Part No. 1SDA071039R1
Each
MYR62,818.19
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A Ekip Dip LI, 4 channels
  • RS Stock No. 259-4483
  • Mfr. Part No. 1SDA072691R1
Each
MYR19,323.23
Temporarily out of stock
Eaton xEffect MCB, 2P, 50A Curve B
  • RS Stock No. 227-0673
  • Mfr. Part No. 239093 FAZ6-B50/2
Each
MYR379.95
1
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