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

46580 Products showing for Fuses & Circuit Breakers

79 / 999+
In Stock
Better World
Schneider Electric Acti 9 4 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 772-1543
  • Mfr. Part No. A9XPH424
Each (In a Pack of 5)
MYR523.162
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 40A, Breaking Capacity 50 kA, DIN Rail Mount
  • RS Stock No. 178-8238
  • Mfr. Part No. LV426403
Each
MYR2,237.49
In Stock
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0513
  • Mfr. Part No. KSB63SM48
Each
MYR653.43
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 4P, 10A Curve C
  • RS Stock No. 247-1951
  • Mfr. Part No. A9F94410
Each
MYR422.71
In Stock
Siemens 315A NH Fuse, NH2, 500V ac
  • RS Stock No. 395-563
  • Mfr. Part No. 3NA3252
Each (In a Pack of 3)
MYR165.613
In Stock
Schneider Electric RCBO, 20A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti9 Range
  • RS Stock No. 222-8513
  • Mfr. Part No. SEE120B03
Each
MYR318.63
In Stock
Lovato ModuLo P1MB MCB, 1P, 4A Curve D, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5621
  • Mfr. Part No. P1MB1PD04
Each
MYR102.19
In Stock
Eaton xEffect MCB, 1P, 2A Curve B
  • RS Stock No. 230-0887
  • Mfr. Part No. 177376 FAZ6-B2/1
Each
MYR128.21
Temporarily out of stock
Eaton 400A Tag Fuse, 64 x 225mm, 660V
  • RS Stock No. 261-687
  • Mfr. Part No. TMT400
Each
MYR1,193.71
Temporarily out of stock
Eaton 20A Fuse Holder for 79 x 27 x 55mm Fuse, 1P, 690V ac
  • RS Stock No. 261-368
  • Mfr. Part No. RS20HWH
1 Pack of 10
MYR1,302.67
Temporarily out of stock
nVent SCHROFF Earthing Kit
  • RS Stock No. 721-3026
  • Mfr. Part No. 24575801
1 Kit
MYR27.75
Temporarily out of stock
Schneider Electric A9Z RCCB, 40A, 4 Pole, 100mA, Type A-SI, 380-415V ac
  • RS Stock No. 211-967
  • Mfr. Part No. A9Z32440
Each
MYR1,456.95
In Stock
Schneider Electric TransferPacT Electronic Circuit Breaker 63A TA100, Fixed
  • RS Stock No. 272-7579
  • Mfr. Part No. TA10D2S0633TPE
Each
MYR7,485.80
In Stock
RS PRO 800mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8125
Each (In a Pack of 50)
MYR1.611
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 63A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3405
  • Mfr. Part No. A9F54363
Each
MYR857.05
Temporarily out of stock
Siemens SENTRON Connection Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-521
  • Mfr. Part No. 3VW9011-0AL78
Each
MYR1,488.31
In Stock
Eaton xEffect MCB, 2P, 8A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3434
  • Mfr. Part No. 102166 FAZ-C8/2-NA
Each
MYR385.23
In Stock
Better World
Schneider Electric 16A T Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 211-2286
  • Mfr. Part No. DF2EA20
Each (In a Pack of 10)
MYR148.982
In Stock
Eaton 250mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7102
  • Mfr. Part No. MDL-1-4-R
Each
MYR20.76
In Stock
ABB 16A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9940
  • Mfr. Part No. OFAF000H16 1SCA022627R0660
Each
MYR36.08
1
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