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

183 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3813
  • Mfr. Part No. 3VA2040-8JQ46-0AA0
Each
MYR13,714.95
In Stock
Eaton xEffect MCB, 1P, 2A Curve B, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6955
  • Mfr. Part No. 278523 FAZ-B2/1
Each
MYR177.55
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-312
  • Mfr. Part No. 3VA5220-7ED41-0AA0
Each
MYR10,742.05
Temporarily out of stock
Schneider Electric, PowerPact Circuit breaker 4P 25A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 357-060
  • Mfr. Part No. BDF46025
Each
MYR5,605.94
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 63 A
  • RS Stock No. 117-691
  • Mfr. Part No. FP 1319
Each
MYR1,801.07
In Stock
Hager NFT MCB, 1+N, 10A, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4741
  • Mfr. Part No. NFT710
Each
MYR426.86
Temporarily out of stock
Eaton 50A Cartridge Fuses, 51 x 359mm
  • RS Stock No. 243-208
  • Mfr. Part No. 12BDGHO50
1 Pack of 3
MYR8,122.47
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 63A, Breaking Capacity 36kA
  • RS Stock No. 260-9742
  • Mfr. Part No. LV510345
Each
MYR2,891.72
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4533
  • Mfr. Part No. 3VA2125-6HM46-0AA0
Each
MYR7,756.83
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3+N, 1.6A Curve D, 415V AC, 100 kA Breaking Capacity
  • RS Stock No. 200-356
  • Mfr. Part No. 2CDS383103R0971
Each
MYR3,784.21
Last RS stock
Mersen 2.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 816-8974
  • Mfr. Part No. W090547
Each (In a Pack of 10)
MYR2.858
Temporarily out of stock
ABB S301 MCB, 1+N, 4A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-037
  • Mfr. Part No. 2CDS381103R0044
Each
MYR1,270.00
Temporarily out of stock
Siemens SENTRON 1 Phase Busbar, 18mm Pitch
  • RS Stock No. 213-2558
  • Mfr. Part No. 5ST3632
Each (In a Pack of 10)
MYR36.387
In Stock
Eaton 5A Tan Automotive Car Fuse, 32V dc
  • RS Stock No. 848-2554
  • Mfr. Part No. ATC-5
Each
MYR5.78
In Stock
Better World
Schneider Electric Busbar Feed Unit, Canalis KBA Series
  • RS Stock No. 219-8846
  • Mfr. Part No. KBA25ABG4W
Each
MYR252.82
In Stock
Eaton xEffect MCB, 2P, 6A Curve D, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3645
  • Mfr. Part No. 278777 FAZ-D6/2
Each
MYR415.25
Temporarily out of stock
Siemens 32A Fuse Holder for 10 x 38mm Fuse, 1P + N, 690V
  • RS Stock No. 300-028
  • Mfr. Part No. 3NW7054
Each
MYR222.70
Temporarily out of stock
ABB RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity
  • RS Stock No. 231-9965
  • Mfr. Part No. 2CSR275189R1324 DS201 M C32 A30 110V
1 Box of 1
MYR1,004.94
In Stock
Schneider Electric RCBO, 16A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type AC, Acti9 Range
  • RS Stock No. 276-9125
  • Mfr. Part No. A9D57416
Each
MYR4,322.49
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 4P, 1.6A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-093
  • Mfr. Part No. 2CDS274061R0258
Each
MYR4,990.39
1
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