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

196 / 999+
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4379
  • Mfr. Part No. 1SDA072560R1
Each
MYR141,712.45
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-249
  • Mfr. Part No. 3VA6210-7KT31-0AA0
Each
MYR17,924.94
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA, 3 channels
  • RS Stock No. 155-834
  • Mfr. Part No. 3VA2450-0MN32-0AA0
Each
MYR23,149.13
Siemens 50A Tag Fuse, NH000, 690V ac, 77.8mm
  • RS Stock No. 287-3448
  • Mfr. Part No. 3NA3820-6KJ
Each
MYR183.55
ABB, Tmax MCCB 3P 1.25kA, Fixed Mount
  • RS Stock No. 237-6001
  • Mfr. Part No. 1SDA062038R1 T7D-M 1250A FF
Each
MYR17,041.71
Better World
Siemens SENTRON 5SL6 MCB, 3+N, 6A Curve C, 400V AC, 72V DC
  • RS Stock No. 212-8819
  • Mfr. Part No. 5SL6406-7
Each
MYR751.02
Better World
ABB System Pro M Compact S200M MCB, 4P, 63A Curve K, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-8078
  • Mfr. Part No. 2CDS254001R0607 S204-K63
Each
MYR1,439.41
Eaton xEffect MCB, 3P, 3A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3330
  • Mfr. Part No. 278863 FAZ-C3/3
Each
MYR754.48
Siemens 150A Tag Fuse, 141mm, 500V, 109mm
  • RS Stock No. 608-754
  • Mfr. Part No. 3NC2423-0C
1 Pack of 3
MYR2,721.91
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC 2 Pole 250V ac Voltage Rating DIN Rail, 500mA Current Rating
  • RS Stock No. 135-514
  • Mfr. Part No. 0914947
1 Pack of 3
MYR2,376.65
ABB 80A Tag Fuse, 79 x 30 x 60mm, 690V
  • RS Stock No. 250-4460
  • Mfr. Part No. 1SCA022700R9440
1 Box of 3
MYR136.63
ABB RCBO, 16A Current Rating, 2P Poles, 10mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6976
  • Mfr. Part No. 2CSR255180R0165
Each
MYR1,407.86
ABB System Pro M Compact SU200M MCB, 1P, 13A Curve C, 277V AC, 277V DC, 15 kA Breaking Capacity
  • RS Stock No. 231-9711
  • Mfr. Part No. 2CDS271337R0134 SU201M-C13
1 Box of 1
MYR237.85
RS PRO PC Board Non Resettable Fuse, Radial 5A, 250V
  • RS Stock No. 767-5165
Each (In a Pack of 10)
MYR1.408
Better World
ABB System Pro M Compact S200 MCB, 1P, 6A Curve K, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 514-0125
  • Mfr. Part No. 2CDS251001R0377 S201-K6
Each
MYR157.57
Eaton xEffect MCB, 4P, 16A Curve C, 240 → 415V AC, 96V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7144
  • Mfr. Part No. 279061 FAZ-C16/4
Each
MYR997.17
ABB RCBO, 50A Current Rating, 1P Poles, Type C
  • RS Stock No. 237-5236
  • Mfr. Part No. 2CSR275051R2504
Each
MYR957.68
RS PRO Earthing Strap Copper 300 x 13mm Diameter
  • RS Stock No. 264-9247
Each (In a Pack of 5)
MYR41.508
Legrand 32A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 167-4387
  • Mfr. Part No. 0 134 32
Each (In a Pack of 10)
MYR20.184
Better World
ABB SN201 MCB, 1P, 40A Curve D
  • RS Stock No. 237-1428
  • Mfr. Part No. 2CSS255101R0401
Each
MYR195.42
1
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