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

227 / 999+
Better World
ABB System Pro M Compact S200 MCB, 2P, 6A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7854
  • Mfr. Part No. 2CDS252001R0061 S202-D6
Each
MYR307.44
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-138
  • Mfr. Part No. KV 8448 M
Each
MYR1,280.94
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4494
  • Mfr. Part No. 1SDA072704R1
Each
MYR31,950.37
630A Ceramic Cartridge Fuse, 130 x 220mm
  • RS Stock No. 262-263
  • Mfr. Part No. 630NHG4G 500V 630A NH4 FUSE gG
Each
MYR818.23
Better World
ABB, XT2L MCCB 3P 2A, Fixed Mount
  • RS Stock No. 236-7396
  • Mfr. Part No. 1SDA067629R1 XT2L 160 TMD 2A FF
Each
MYR2,523.99
Eaton 2A Bolted Tag Fuse, A2, 550V ac, 73mm
  • RS Stock No. 181-8864
  • Mfr. Part No. AAO2
Each
MYR22.45
Siemens SENTRON 5SJ4150 MCB, 1P, 50A Curve B, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 299-906
  • Mfr. Part No. 5SJ4150-6HG40
Each
MYR571.87
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1709
  • Mfr. Part No. 3VA2063-5KP36-0AA0
Each
MYR5,882.05
Siemens SENTRON Connection Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-520
  • Mfr. Part No. 3VW9011-0AL32
1 Kit
MYR1,173.27
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 10A Curve K, 15 kA Breaking Capacity
  • RS Stock No. 219-9299
  • Mfr. Part No. A9F95210
Each
MYR1,232.80
Better World
Schneider Electric, Acti 9, Clario, Librio, Prodis MCCB, DIN Rail Mount
  • RS Stock No. 248-3690
  • Mfr. Part No. A9N26476
Each
MYR437.75
Littelfuse 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 769-0041
  • Mfr. Part No. 0219005.MXABP
Each (In a Pack of 10)
MYR5.244
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-768
  • Mfr. Part No. 3VA6140-7JQ41-0AA0
Each
MYR14,177.00
RS PRO 3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3405
Each (In a Pack of 10)
MYR2.025
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 63A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9377
  • Mfr. Part No. 3VA1163-3ED22-0AA0
Each
MYR1,427.07
Littelfuse 10A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0079
  • Mfr. Part No. 0314010.HXP
Each (In a Pack of 10)
MYR4.912
Hager Vega D Mounting Plate
  • RS Stock No. 144-4605
  • Mfr. Part No. FD02F2
Each
MYR1,797.41
HENSEL ENYSTAR Distribution Board, 63 A
  • RS Stock No. 117-214
  • Mfr. Part No. FP 1215
Each
MYR1,029.30
Siemens SENTRON 1 Phase Busbar, 18mm Pitch
  • RS Stock No. 226-0829
  • Mfr. Part No. 5ST3732
Each
MYR51.79
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 1A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2345
  • Mfr. Part No. A9F07301
Each
MYR961.20
1
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