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

126 / 999+
Eaton 16A DII Bottle Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 181-8581
  • Mfr. Part No. 16D27Q
1 Box of 25
MYR244.08
Better World
Schneider Electric RCD, 32A Current Rating, 1P+N Poles, Type AB, Easy9 Range
  • RS Stock No. 850-8669
  • Mfr. Part No. EZ9D16832
Each
MYR170.69
Siemens SIRIUS 3 Phase Busbar, 690V, 45mm Pitch
  • RS Stock No. 866-5513
  • Mfr. Part No. 3RV1915-1BB
Each
MYR71.91
Eaton RCD, 40A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 922-8654
  • Mfr. Part No. 235427 PFIM-40/2/003-A-MW
Each
MYR885.74
SIBA 160A NH Fuse, NH00, 500V ac
  • RS Stock No. 421-744
  • Mfr. Part No. 20-001-13/160E1
Each (In a Pack of 3)
MYR54.407
Siemens 32A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 395-812
  • Mfr. Part No. 3NC1032
Each (In a Pack of 10)
MYR98.179
Siemens SENTRON Retrofit Kit
  • RS Stock No. 277-0933
  • Mfr. Part No. 3WA9111-0EK52
1 Set
MYR1,950.79
Siemens SENTRON Retrofit Kit
  • RS Stock No. 277-0934
  • Mfr. Part No. 3WA9111-0EK53
1 Set
MYR1,950.79
Mersen 2A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2892
  • Mfr. Part No. S216653
1 Box of 10
MYR228.77
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 400V ac
  • RS Stock No. 867-4369
  • Mfr. Part No. 3101.0230
Each (In a Pack of 10)
MYR11.515
ABB S800S MCB, 2P, 25A Curve D, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-384
  • Mfr. Part No. 2CCS862001R0321
Each
MYR1,122.83
Better World
ABB, XT2H MCCB 4P 3.2A, Fixed Mount
  • RS Stock No. 236-7384
  • Mfr. Part No. 1SDA067608R1 XT2H 160 TMD 3.2A FF
Each
MYR2,251.97
Schneider Electric RCBO, 16A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 222-8512
  • Mfr. Part No. SEE116B03
Each
MYR756.96
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 6A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3290
  • Mfr. Part No. A9F54106
Each
MYR212.39
Eaton 3A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-560
  • Mfr. Part No. TDC180-3A
Each (In a Pack of 10)
MYR3.635
Siemens 35A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 203-2026
  • Mfr. Part No. 3NA7814
Each (In a Pack of 3)
MYR43.24
Eaton 2A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8210P
  • Mfr. Part No. PV-2A10F
Each (Supplied in a Box)
MYR59.09
Schurter 16A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3880
  • Mfr. Part No. 8020.5080
Each
MYR4.09
Phoenix Contact Single Phase Surge Arrester, 40kA, = 1.5kV, DIN Rail Mount
  • RS Stock No. 249-9517
  • Mfr. Part No. 2804432
Each
MYR1,112.52
Eaton 15A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8239
  • Mfr. Part No. PV-15A10F
Each
MYR82.66
1
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