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

238 / 999+
Temporarily out of stock
Better World
Schneider Electric Busbar End Feed Unit, Canalis KS Series
  • RS Stock No. 211-0475
  • Mfr. Part No. KSA630ABG4
Each
MYR11,749.49
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-9880
  • Mfr. Part No. 1SDA070713R1
Each
MYR26,019.47
Temporarily out of stock
Schneider Electric MasterPact Insulation accessory for use with MTZ1
  • RS Stock No. 212-003
  • Mfr. Part No. LV833768SP
Each
MYR600.83
In Stock
Phoenix Contact PTFIX Distribution Board, 17.5 A
  • RS Stock No. 609-768
  • Mfr. Part No. 1187192
1 Pack of 10
MYR8,435.00
In Stock
ABB RCBO, 40A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6943
  • Mfr. Part No. 2CSR255080R1405 DS201 B40 AC30
Each
MYR470.41
Temporarily out of stock
32A Fuse Holder for 77 x 48 x 26mm Fuse, 1P, 550V ac
  • RS Stock No. 262-981
  • Mfr. Part No. 32NNSFGREEN FUSE HOLDER 32A 550V UNIT GREEN
1 Pack of 10
MYR814.33
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7255
  • Mfr. Part No. 1SDA067330R1 Ekip LS/I In=63A XT2 4p
Each
MYR2,826.42
In Stock
Better World
Schneider Electric Acti9 iIG40 RCCB, 63A, 3+N Pole, 300mA, Type AC, 380 → 415V ac
  • RS Stock No. 238-3475
  • Mfr. Part No. A9R77763
Each
MYR2,999.45
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 63A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2332
  • Mfr. Part No. A9F07263
Each
MYR1,189.33
In Stock
Siemens SENTRON Door Feedthrough Accessory for use with Circuit Breaker 3VL7
  • RS Stock No. 265-600
  • Mfr. Part No. 8UC7314-6BD44
Each
MYR1,743.61
In Stock
ABB DDA200 RCD, 25A, 2 Pole, 300mA, Type AC
  • RS Stock No. 183-3649
  • Mfr. Part No. 2CSB202001R3250
Each
MYR681.19
In Stock
Eaton 125A Bolted Tag Fuse, 415V ac, 82mm
  • RS Stock No. 181-8890
  • Mfr. Part No. 125MJ30-7
Each
MYR230.53
In Stock
Siemens 80A Centred Tag Fuse, NH00, 400V
  • RS Stock No. 230-2965
  • Mfr. Part No. 3NA6824-4KK
Each (In a Pack of 3)
MYR61.097
Temporarily out of stock
Better World
Schneider Electric Surge Protector, 20kA, DIN Rail Mount
  • RS Stock No. 219-8279
  • Mfr. Part No. A9L65601
Each
MYR5,400.02
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7641
  • Mfr. Part No. C11H4TM100L
Each
MYR4,476.25
Temporarily out of stock
Hager RCBO, 40A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type A
  • RS Stock No. 602-212
  • Mfr. Part No. ADX490C
Each
MYR3,267.67
Temporarily out of stock
Siemens SENTRON 4 Phase Busbar
  • RS Stock No. 328-518
  • Mfr. Part No. 5ST2521
Each
MYR722.43
In Stock
Siemens SENTRON 5SP4 MCB, 3P, 100A Curve D
  • RS Stock No. 216-4054
  • Mfr. Part No. 5SP4391-8
Each
MYR2,391.90
Temporarily out of stock
Eaton 16A gG/gL Cartridge Fuse, 14 x 51mm
  • RS Stock No. 229-272
  • Mfr. Part No. C14G16
1 Pack of 10
MYR96.00
In Stock
Eaton 200mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9411
  • Mfr. Part No. S500-200-R
1 Bag of 1000
MYR3,548.22
1
238
2329
Results per page

Related links