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

230 / 999+
Legrand DX3 Circuit Breaker, 2P, 3A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 266-1328
  • Mfr. Part No. 408010
Each
MYR968.54
ABB S800 Separating Neutral for use with S800
  • RS Stock No. 140-298
  • Mfr. Part No. 2CCS800900R0061
Each
MYR642.30
ETI 2A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-818
  • Mfr. Part No. 2311401
Each (In a Pack of 5)
MYR5.784
Hager NGN MCB, 2P, 4A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4759
  • Mfr. Part No. NGN204
Each
MYR826.89
Eaton Eaton Moeller FAZ-DC MCB Mini Circuit Breaker, 2P, 20A Curve B, 500V DC, 10 kA Breaking Capacity
  • RS Stock No. 125-836
  • Mfr. Part No. 176082 FAZ-B20/2-DC
Each
MYR857.63
Eaton, xEnergy MCCB 3P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 454-8073
  • Mfr. Part No. 259079 NZMB1-A100
Each
MYR2,491.35
Better World
Siemens RCBO, 16A Current Rating, 3P Poles, 300mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6232
  • Mfr. Part No. 5SU1636-6FP16
Each
MYR1,546.70
Schneider Electric 440V ac Circuit Breaker Circuit Trip for use with Circuits
  • RS Stock No. 130-543
  • Mfr. Part No. C16F44B160
Each
MYR22,782.47
Better World
Schneider Electric Cable Connection Kit for use with Compact Nsx 100 To 630
  • RS Stock No. 221-1172
  • Mfr. Part No. LV429272
Each
MYR607.98
Eaton 30A Fuse Holder for 10 x 38mm Fuse, 2P, 690V
  • RS Stock No. 263-148
  • Mfr. Part No. CHM2DIU
1 Pack of 6
MYR561.48
Better World
Schneider Electric Acti 9 A9N1 MCB, 2P, 80A Curve B
  • RS Stock No. 221-0880
  • Mfr. Part No. A9N18413
Each
MYR1,665.61
SIBA SMD Non Resettable Fuse 2A, 250V
  • RS Stock No. 736-2642
  • Mfr. Part No. 160000.2
Each (In a Bag of 10)
MYR36.661
WAGO Electronic Circuit Breaker 500mA 24V 787, 1 channels , DIN Rail
  • RS Stock No. 279-4125
  • Mfr. Part No. 787-2861/050-000
Each
MYR397.58
Littelfuse Spring Brass PCB Mount Fuse Clip for 6.3 x 32mm Cartridge Fuse
  • RS Stock No. 787-4249P
  • Mfr. Part No. 01020071Z
Each (Supplied in a Bag)
MYR1.287
Sato Parts Panel Mount Fuse Holder for 5 x 20 mm, 6.3 x 32 mm Fuse
  • RS Stock No. 371-8552
  • Mfr. Part No. F-7155
Each (In a Pack of 5)
MYR21.208
Siemens 8GB Enclosure for use with Screw terminal
  • RS Stock No. 211-6093
  • Mfr. Part No. 8GB5024-0KM
Each
MYR490.58
Eaton 4A Bolted Tag Fuse, 240V ac, 35mm
  • RS Stock No. 181-8537
  • Mfr. Part No. LST4
1 Box of 20
MYR658.57
RS PRO Thermal Circuit Breaker - 2 Pole 250V ac Voltage Rating, 3A Current Rating
  • RS Stock No. 774-0106
Each
MYR15.98
Mersen 80A NH Fuse, NH000, 400V ac
  • RS Stock No. 270-3080
  • Mfr. Part No. M223686
Each (In a Box of 3)
MYR50.613
Better World
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3303
  • Mfr. Part No. 1SDA071210R1
Each
MYR128,702.81
1
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