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

272 / 999+
Temporarily out of stock
Schneider Electric Acti 9 A9C MCB, 2P, 40A, 500V AC, 10 kA Breaking Capacity
  • RS Stock No. 276-1534
  • Mfr. Part No. A9C62240
Each
MYR3,226.59
In Stock
RS PRO 10A Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 178-4177
Each (In a Pack of 50)
MYR2.054
Temporarily out of stock
Schneider Electric, EasyPact Circuit breaker 4P 630A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 124-548
  • Mfr. Part No. EZC630N4500N
Each
MYR9,834.93
In Stock
Schurter 2.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7832
  • Mfr. Part No. 0034.1520
Each (In a Bag of 10)
MYR1.368
Temporarily out of stock
Schneider Electric Flexible Busbar Trunking, 0.5 → 1.9m, 400A, Canalis Series
  • RS Stock No. 119-366
  • Mfr. Part No. KSA400ET43A
Each
MYR16,403.79
Last RS stock
RS PRO 50A Bolted Tag Fuse, A3, 690V ac, 73mm
  • RS Stock No. 221-3716
Each (In a Pack of 10)
MYR53.644
Temporarily out of stock
Siemens SENTRON Cover for use with Power Distribution and Low Voltage Switch Gear
  • RS Stock No. 216-5987
  • Mfr. Part No. 5SH5526
Each (In a Pack of 5)
MYR98.388
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 84A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-993
  • Mfr. Part No. 3RV2342-4RC10
Each
MYR3,094.83
In Stock
Hager 3 Phase Busbar
  • RS Stock No. 144-4831
  • Mfr. Part No. KB363A
Each
MYR172.09
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-4878
  • Mfr. Part No. 3VA1112-4ED32-0AA0
Each
MYR3,368.54
Temporarily out of stock
Better World
Siemens RCBO, 6A Current Rating, 2P Poles, 300mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8831
  • Mfr. Part No. 5SV1616-7KK06
Each
MYR659.23
Temporarily out of stock
Siemens ALPHA Kit
  • RS Stock No. 213-2413
  • Mfr. Part No. 8GK9100-0KK00
Each
MYR131.30
Temporarily out of stock
ABB 250A Tag Fuse, NH1, 690V
  • RS Stock No. 250-4470
  • Mfr. Part No. 1SCA022701R0370
1 Box of 3
MYR423.82
In Stock
Contactum A Type RCD RCCB, 100A, 4 Pole, 300mA, Type A, 220 → 415V ac
  • RS Stock No. 240-6406
  • Mfr. Part No. CPR100030A
Each
MYR588.67
Temporarily out of stock
Better World
ABB, XT4S MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-6781
  • Mfr. Part No. 1SDA068507R1 XT4S 160 Ekip LSIG 63A FF
Each
MYR11,316.32
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-4678
  • Mfr. Part No. 1SDA072954R1
Each
MYR41,723.93
Temporarily out of stock
Better World
Schneider Electric iID RCCB, 100A, 4 Pole, 30mA, Type AC, 415V ac
  • RS Stock No. 248-3694
  • Mfr. Part No. A9R11491
Each
MYR3,614.72
In Stock
RS PRO 630mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9636
Each (In a Pack of 10)
MYR1.955
In Stock
Eaton RCCB, 40A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 230-1064
  • Mfr. Part No. 109272 PFGCM-40/2/003
Each
MYR300.95
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 2P, 500mA, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-352
  • Mfr. Part No. 2CDS272061R0158
Each
MYR2,034.90
1
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