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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

207 / 999+
Temporarily out of stock
Legrand DX Range DX3 MCB, 25A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9689
  • Mfr. Part No. 4 077 02
Each
MYR623.26
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 4P, 50A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8897
  • Mfr. Part No. 5SY6450-7
Each
MYR1,666.40
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 3P, 13A Curve C, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-371
  • Mfr. Part No. 2CDS273061R0134
Each
MYR2,319.97
In Stock
Better World
Schneider Electric Acti 9 1, 3 Phase Distribution Board, 4 Way
  • RS Stock No. 125-1411
  • Mfr. Part No. SEA9BNEX034N
Each
MYR1,580.28
Temporarily out of stock
ABB RCBO, 50A Current Rating, 1P Poles, Type C
  • RS Stock No. 237-5230
  • Mfr. Part No. 2CSR275051R0504
Each
MYR921.71
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4304
  • Mfr. Part No. 3VA1140-4EF36-0AA0
Each
MYR1,568.37
Temporarily out of stock
Siemens SENTRON Adapter for use with 60 mm busbar system
  • RS Stock No. 213-2420
  • Mfr. Part No. 8US1251-5DS11
Each
MYR220.96
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 3+N, 1A Curve C
  • RS Stock No. 216-4789
  • Mfr. Part No. 5SY7601-7
Each
MYR1,131.65
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 1+N, 20A Curve B, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-7530
  • Mfr. Part No. 5SY6520-6
Each
MYR290.56
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4643
  • Mfr. Part No. 3VA2140-6KQ46-0AA0
Each
MYR12,059.30
In Stock
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 100/160/250/400/630 circuit breakers
  • RS Stock No. 210-9408
  • Mfr. Part No. 3VA9487-0GA80
Each
MYR249.21
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3788
  • Mfr. Part No. 3VA2140-6HN36-0AA0
Each
MYR4,495.73
Temporarily out of stock
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-773
  • Mfr. Part No. 3VA5210-5EC41-0AA0
Each
MYR6,340.04
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 231-9331
  • Mfr. Part No. 1SDA100355R1 XT5N 630 EkipDip LS/I 630
Each
MYR10,500.36
In Stock
ABB SA1 Padlock Adapter for use with S 260-270-280
  • RS Stock No. 455-2662
  • Mfr. Part No. GJF1101903R0001 SA1
Each
MYR37.31
Temporarily out of stock
Better World
Eaton 500A Tag Fuse, 217 x 82 x 94mm, 1kV, 170mm
  • RS Stock No. 282-6250
  • Mfr. Part No. PV-500A-3L-B
Each
MYR4,152.83
Temporarily out of stock
Lovato 2 Phase Surge Protector, 50kA
  • RS Stock No. 216-8301
  • Mfr. Part No. SG22PA300R
Each
MYR1,289.43
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3+N, 6A Curve C, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-791
  • Mfr. Part No. 2CDS273103R0064
Each
MYR2,277.62
Temporarily out of stock
Siemens 400A Centred Tag Fuse, NH2L, 1kV
  • RS Stock No. 230-3000
  • Mfr. Part No. 3NE1332-4D
Each (In a Pack of 2)
MYR1,667.09
In Stock
Schurter 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-6153
  • Mfr. Part No. 0034.3127
Each (In a Pack of 10)
MYR2.097
1
207
2329
Results per page

Related links