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

298 / 999+
Temporarily out of stock
Better World
Siemens, 3VA1 MCCB 4P 25A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 210-3333
  • Mfr. Part No. 3VA1125-3EF42-0AA0
Each
MYR2,134.24
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3490
  • Mfr. Part No. 1SDA071457R1
Each
MYR50,699.57
Temporarily out of stock
Siemens SENTRON Conversion Kit
  • RS Stock No. 277-0931
  • Mfr. Part No. 3WA9111-0EK43
1 Set
MYR1,409.42
Temporarily out of stock
Schneider Electric, Canalis Series
  • RS Stock No. 358-397
  • Mfr. Part No. KSB630SE5
Each
MYR91,363.20
In Stock
ETI 4A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-636
  • Mfr. Part No. 2312402
Each (In a Pack of 5)
MYR7.442
Temporarily out of stock
ABB RCBO, 63A Current Rating, 2P Poles, Type B
  • RS Stock No. 237-5150
  • Mfr. Part No. 2CSR272101R1635
Each
MYR1,788.04
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 100A 3VA2, 3 channels
  • RS Stock No. 157-082
  • Mfr. Part No. 3VA2110-5KQ36-0AA0
Each
MYR10,650.78
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 10A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1252
  • Mfr. Part No. 5SY4110-8
Each
MYR159.95
In Stock
ETA Thermal Circuit Breaker - 1110 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 417-010
  • Mfr. Part No. 1110-F112-P1M1-10A
Each
MYR119.79
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 55 kA
  • RS Stock No. 209-6984
  • Mfr. Part No. 3VA1125-5EF32-0AA0
Each
MYR1,952.55
In Stock
ABB SMISSLINE TP MCB, 2P, 32A Curve C, 415V AC
  • RS Stock No. 246-2536
  • Mfr. Part No. 2CCS571103R8324
Each
MYR490.15
Temporarily out of stock
Schneider Electric 3, 3+N Phase Surge Arrester, 65kA, 1.5kV, DIN Rail Mount
  • RS Stock No. 654-689
  • Mfr. Part No. A9L15586
Each
MYR5,910.72
In Stock
ABB SN201 MCB, 1+N, 25A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 186-3473
  • Mfr. Part No. 2CSS245102R0254
Each
MYR99.73
Temporarily out of stock
Better World
Siemens SENTRON 5SY4 MCB, 3+N, 3A Curve C
  • RS Stock No. 216-5932
  • Mfr. Part No. 5SY4603-7
Each
MYR886.51
In Stock
Schurter 30A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2675
  • Mfr. Part No. 8020.0607.G
Each (In a Pack of 10)
MYR5.638
Temporarily out of stock
Better World
Eaton 250A Tag Fuse, 3L, 1.5kV, 170mm
  • RS Stock No. 282-6524
  • Mfr. Part No. PV-250A-3L-B-15
Each
MYR2,265.89
Temporarily out of stock
ABB S800U MCB, 1P, 10A, Type Z, 240V AC, 30 kA Breaking Capacity
  • RS Stock No. 140-437
  • Mfr. Part No. 2CCS881017R0105
Each
MYR578.68
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 50A Curve C, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3449
  • Mfr. Part No. A9F54450
Each
MYR1,454.91
Temporarily out of stock
RS PRO 60A Ceramic Cartridge Fuse, 15 x 22mm
  • RS Stock No. 188-4498
Each (In a Box of 320)
MYR58.946
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 630A, Fixed Mount
  • RS Stock No. 260-8263
  • Mfr. Part No. C63W42D630
Each
MYR33,224.55
1
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