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

1 / 999+
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 3A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2805
  • Mfr. Part No. 2909909
Each
MYR223.87
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 63A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3543
  • Mfr. Part No. A9F55263
Each
MYR782.99
Temporarily out of stock
Schneider Electric R9R RCCB, 25A, 2 Pole, 10mA, Type A, 230V ac
  • RS Stock No. 212-340
  • Mfr. Part No. R9R26225
Each
MYR734.92
In Stock
Eaton 600mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 849-5746
  • Mfr. Part No. GMC-600-R
Each
MYR7.30
Temporarily out of stock
ABB RCBO, 25A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6971
  • Mfr. Part No. 2CSR255080R1255 DS201 B25 AC30
Each
MYR727.73
In Stock
Better World
Schneider Electric Multi 9 C60BP MCB, 2P, 20A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2447
  • Mfr. Part No. M9F43220
Each
MYR929.39
In Stock
Better World
Schneider Electric, ComPacT New Generation Circuit breaker 3P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 254-6286
  • Mfr. Part No. C10F3TM100
Each
MYR2,764.59
In Stock
ABB 32A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9956
  • Mfr. Part No. OFAF000H32 1SCA022627R0910
Each
MYR32.54
In Stock
Siemens ALPHA Busbar
  • RS Stock No. 226-0832
  • Mfr. Part No. 8GK9733-0KK20
Each
MYR165.59
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 100A, Breaking Capacity 36kA, Fixed Mount
  • RS Stock No. 260-9735
  • Mfr. Part No. LV510337
Each
MYR2,223.60
In Stock
Better World
Siemens SENTRON 5SY5 MCB, 2P, 6A Curve C, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-2356
  • Mfr. Part No. 5SY5206-7
Each
MYR660.43
In Stock
Weidmuller Electronic Circuit breaker 24V AMG FIM-0, 2 channels , DIN Rail Mount
  • RS Stock No. 179-2988
  • Mfr. Part No. 2081870000
Each
MYR28.23
In Stock
ETA Thermal Circuit Breaker - 1170 Single Pole 28V dc Voltage Rating, 25A Current Rating
  • RS Stock No. 854-481
  • Mfr. Part No. 1170-21-25A
Each
MYR71.83
Last RS stock
Siemens 63A NH Fuse, NH000, 500V ac
  • RS Stock No. 396-067
  • Mfr. Part No. 3NA3822
Each (In a Pack of 3)
MYR160.47
In Stock
ASSMANN WSW Surge Protector, 10kV, DIN Rail Mount
  • RS Stock No. 649-587
  • Mfr. Part No. DN-95421
Each
MYR217.89
In Stock
Better World
Schneider Electric Acti 9 2 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2720
  • Mfr. Part No. A9XPH212
Each
MYR245.73
Temporarily out of stock
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 232-0270
  • Mfr. Part No. 1SDA068092R1 XT4N 250 TMA 250A FF
Each
MYR3,864.70
In Stock
Eaton 6A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 489-4629
  • Mfr. Part No. FWC-6A10F
Each
MYR34.91
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 400A, Breaking Capacity 36kA, Fixed Mount
  • RS Stock No. 260-9781
  • Mfr. Part No. LV540306
Each
MYR5,575.37
In Stock
Eaton 15A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-3942
  • Mfr. Part No. KTK-R-15
Each
MYR180.11
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