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

52 / 999+
Temporarily out of stock
ABB, Tmax XT MCCB 4P 80A, Fixed Mount
  • RS Stock No. 236-7279
  • Mfr. Part No. 1SDA067405R1 XT1C 160 TMD 80A FF
Each
MYR2,418.28
In Stock
RS PRO Residential RCCBs, 40A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 284-2369
Each
MYR223.94
Temporarily out of stock
RS PRO 2A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8045
Each (In a Box of 500)
MYR3.555
In Stock
Eaton 63A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 181-8779
  • Mfr. Part No. C22M63
Each
MYR28.83
In Stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 874-4382
  • Mfr. Part No. 3VA2116-5HL32-0AA0
Each
MYR3,883.88
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS Stock No. 611-0686
Each (In a Pack of 10)
MYR4.541
Limited stock
Littelfuse 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4347
  • Mfr. Part No. 0217.500MXP
Each (In a Pack of 10)
MYR1.406
Last RS stock
ABB System Pro M Compact S200L MCB, 4P, 16A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 183-3666
  • Mfr. Part No. 2CDS244701R0164
Each
MYR450.60
In Stock
Eaton xEffect MCB, 3P, 32A Curve D, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3594
  • Mfr. Part No. 278899 FAZ-D32/3
Each
MYR685.22
In Stock
Better World
Schneider Electric 125A Rail Mount Fuse Holder for 22 x 58mm Fuse, 3P+N, 690V ac
  • RS Stock No. 482-483
  • Mfr. Part No. DF223NVC
Each
MYR700.93
In Stock
RS PRO MCB, 1P, 3A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0200
Each
MYR48.36
In Stock
Better World
Schneider Electric 24V ac/dc Remote Tripping Device Circuit Trip for use with LR3D Series, LRD Series
  • RS Stock No. 744-6961
  • Mfr. Part No. LAD703B
Each
MYR400.40
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 25A Curve D, 253V AC, 72V DC, 20 kA Breaking Capacity
  • RS Stock No. 225-5989
  • Mfr. Part No. 2CDS251001R0251 S201 D 25A - 10 KA
Each
MYR128.16
Temporarily out of stock
Phoenix Contact Industrial Surge Protection, 100kA
  • RS Stock No. 224-9866
  • Mfr. Part No. 2905470
Each
MYR5,831.77
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 32A, Breaking Capacity 16 kA
  • RS Stock No. 209-6956
  • Mfr. Part No. 3VA1032-2ED32-0AA0
Each
MYR1,614.02
In Stock
Mersen 10A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2740
  • Mfr. Part No. E222207
1 Box of 10
MYR210.43
Temporarily out of stock
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8960
  • Mfr. Part No. R9H18403
Each
MYR593.18
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 32A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3398
  • Mfr. Part No. A9F54332
Each
MYR787.56
In Stock
Better World
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 191-6074
  • Mfr. Part No. A9DA2616
Each
MYR1,462.60
In Stock
Schneider Electric Padlock Device for use with ComPact NS630b → NS1600
  • RS Stock No. 181-2588
  • Mfr. Part No. 44936
Each
MYR169.24
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