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

133 / 999+
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7808
  • Mfr. Part No. C16N4
Each
MYR3,995.42
In Stock
Better World
Siemens SENTRON 5SY4 MCB, 1P, 8A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 202-7144
  • Mfr. Part No. 5SY4108-7
Each
MYR252.80
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 20A Curve C, 400V AC, 12 → 250V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9172
  • Mfr. Part No. A9F77420
Each
MYR1,236.71
Temporarily out of stock
Schneider Electric ComPacT NS630b...1600, ComPacT NS1600b...3200 Thermal Magnetic Release for use with Distribution
  • RS Stock No. 119-461
  • Mfr. Part No. C20FM
Each
MYR7,952.06
Temporarily out of stock
ABB PS1 1 Phase Busbar, 400V
  • RS Stock No. 231-9630
  • Mfr. Part No. 2CDL210001R1003 PS1/3
1 Box of 1
MYR16.13
In Stock
ABB 25A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9952
  • Mfr. Part No. OFAF000H25 1SCA022627R0820
Each
MYR32.27
In Stock
Eaton 20A NH Fuse, NH000, 690V ac
  • RS Stock No. 181-8718
  • Mfr. Part No. 20NHG000B-690
Each
MYR31.54
In Stock
SIBA 4A M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3515
  • Mfr. Part No. 70-010-05/4A
Each (In a Pack of 5)
MYR23.536
Limited stock
WAGO 30A Fuse Holder for 10 x 38mm Fuse, 1P, 600V ac
  • RS Stock No. 279-1654
  • Mfr. Part No. 811-410
Each
MYR72.05
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 2A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7848
  • Mfr. Part No. 2CDS252001R0021 S202-D2
Each
MYR335.17
In Stock
ABB RCBO, 10A Current Rating, 2P Poles, 100mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6894
  • Mfr. Part No. 2CSR255180R2105 DS201 B10 A100
Each
MYR1,347.92
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV3P 3 Pole 690V ac Voltage Rating DIN Rail Mount, 73A Current Rating
  • RS Stock No. 188-4747
  • Mfr. Part No. GV3P73
Each
MYR1,412.52
In Stock
RS PRO 10A Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 178-4177
Each (In a Pack of 50)
MYR2.054
Limited stock
ETA Thermal Circuit Breaker - 1140-E Single Pole 250V Voltage Rating Integral Mount, 10A Current Rating
  • RS Stock No. 728-8673
  • Mfr. Part No. 1140-E211-P1M1-10A
Each
MYR97.82
In Stock
Eaton 30A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 848-2902
  • Mfr. Part No. AGC-30-R
Each
MYR6.54
In Stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 20 kA, Fixed Mount
  • RS Stock No. 232-0088
  • Mfr. Part No. 1SDA054396R1 T5N630 FF PR221-LS 630A
Each
MYR7,985.15
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 50A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3587
  • Mfr. Part No. A9F55350
Each
MYR647.02
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 32A Curve B, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-059
  • Mfr. Part No. 2CDS272001R0325 S202M-B32
Each
MYR327.47
Temporarily out of stock
Better World
Schneider Electric 25A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 219-9065
  • Mfr. Part No. DF2EN25
Each (In a Pack of 10)
MYR149.36
In Stock
Eaton 2.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1486
Each (In a Pack of 10)
MYR1.287
1
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