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

200 / 999+
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 250-093
  • Mfr. Part No. 3VA6580-5HN32-2AA0
Each
MYR27,376.27
Eaton 63A Fuse Holder for 36 x 71 x 26mm Fuse, 1P, 400V
  • RS Stock No. 261-730
  • Mfr. Part No. FRN02C
1 Pack of 15
MYR816.42
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-3407
  • Mfr. Part No. 1SDA071341R1
Each
MYR27,358.64
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 150A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-525
  • Mfr. Part No. 3VA6115-5HL41-0AA0
Each
MYR9,179.74
ABB System Pro M Compact S200 M UC MCB, 3P, 16A Curve B, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-211
  • Mfr. Part No. 2CDS273061R0165
Each
MYR2,533.75
Littelfuse 20A Base Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 300V ac
  • RS Stock No. 787-4316
  • Mfr. Part No. 03540821ZXBL
Each (In a Pack of 5)
MYR7.424
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 432-856
  • Mfr. Part No. C080N32EFM
Each
MYR45,060.53
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4283
  • Mfr. Part No. 1SDA072411R1
Each
MYR51,202.48
Eaton 125A Bolted Tag Fuse, LET, 150 V dc, 240V ac, 41mm
  • RS Stock No. 182-1407
  • Mfr. Part No. 125LET
Each (In a Box of 10)
MYR106.073
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4225
  • Mfr. Part No. 1SDA072349R1
Each
MYR53,990.18
Hager 72 Way Plastic Consumer Unit, IP30 FD
  • RS Stock No. 144-4611
  • Mfr. Part No. FD32AN
Each
MYR2,151.11
ABB Wall Fixing Brackets
  • RS Stock No. 237-3376
  • Mfr. Part No. 2CPX062447R9999 UZ4P2
Each
MYR25.52
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, System Pro M Compact Range
  • RS Stock No. 201-6930
  • Mfr. Part No. 2CSR255180R1165 DS201 B16 A30
Each
MYR727.66
ABB Tmax XT Rotary Handle for use with Tmax XT
  • RS Stock No. 237-6095
  • Mfr. Part No. 1SDA066581R1 RHS R XT1-XT3 F/P STAN
Each
MYR998.09
Wurth Elektronik Earthing Strap
  • RS Stock No. 756-8689
  • Mfr. Part No. 74273703
Each
MYR24.34
Siemens 160A NH Fuse, NH2, 500V ac
  • RS Stock No. 395-541
  • Mfr. Part No. 3NA3236
Each (In a Pack of 3)
MYR125.70
RS PRO 500mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9759
Each (In a Pack of 10)
MYR2.869
Siemens 20A Fuse Holder for 8 x 32mm Fuse, 1P + N, 400V
  • RS Stock No. 300-034
  • Mfr. Part No. 3NW7353
Each
MYR100.49
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 30mA Trip Sensitivity, SENTRON Range
  • RS Stock No. 211-9602
  • Mfr. Part No. 5SU1354-3KK13
Each
MYR1,060.44
Wickmann Non Resettable Fuse 2A, 250V ac
  • RS Stock No. 174-0501
  • Mfr. Part No. 37012000410
1 Box of 1000
MYR2,603.70
1
200
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