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

225 / 999+
Better World
Schneider Electric RCBO, 10A Current Rating, 1P+N Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 191-6075
  • Mfr. Part No. A9DA6610
Each
MYR1,740.13
Siemens 125A Tag Fuse, 123.9mm, 900V
  • RS Stock No. 608-667
  • Mfr. Part No. 3NB1024-1KK10
1 Pack of 3
MYR1,390.65
Eaton MCB, 3P, 8A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 244-009
  • Mfr. Part No. 101318 PLI-C8/3
Each
MYR809.34
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 500A, Breaking Capacity 50kA, Fixed Mount
  • RS Stock No. 260-9798
  • Mfr. Part No. LV563315
Each
MYR10,788.55
Limitor Thermal Fuse +45°C 2.5 A, 250V ac
  • RS Stock No. 176-9081
  • Mfr. Part No. P82 45 05100
Each
MYR29.75
ABB RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6973
  • Mfr. Part No. 2CSR255480R1104
Each
MYR943.91
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-787
  • Mfr. Part No. 3VA6440-8JP41-2AA0
Each
MYR39,869.41
SIBA 2A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 783-3355
  • Mfr. Part No. 70-059-60/2A
Each (In a Pack of 10)
MYR3.533
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA, 3 channels
  • RS Stock No. 156-777
  • Mfr. Part No. 3VA2463-0HL32-0AA0
Each
MYR21,301.55
Eaton 100A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1534
  • Mfr. Part No. XS100
Each (In a Box of 10)
MYR355.983
Siemens ALPHA Busbar
  • RS Stock No. 629-088
  • Mfr. Part No. 8GK9735-1KK30
Each
MYR5,031.40
Better World
Schneider Electric iC60 RCD, 25A, 4 Pole, 30mA, Type AC
  • RS Stock No. 734-9197
  • Mfr. Part No. A9Q11425
Each
MYR2,024.50
Eaton IZMX/INX Cassette for use with INX40…3-…W, IZMX40…3-…W
  • RS Stock No. 132-341
  • Mfr. Part No. 183953 IZMX-CAS403-4000-SEC-1
Each
MYR29,858.34
Eaton 125mA Cartridge Fuse, 10 x 126mm
  • RS Stock No. 849-5563
  • Mfr. Part No. HVJ-1-8
Each
MYR409.14
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 20A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2314
  • Mfr. Part No. A9F07220
Each
MYR544.12
Eaton xEffect FAZ MCB, 2P, 13A Curve C, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 248-617
  • Mfr. Part No. 102208 FAZ-C13/2-RT
Each
MYR803.91
SIBA 250A NH Fuse, NH1, 500V ac
  • RS Stock No. 543-9920
  • Mfr. Part No. 4184219
Each
MYR77.30
Better World
Schneider Electric Shunt trip for use with Multi 9 C60 C60BP, Multi 9 C60 C60BPR, Multi 9 C60 C60SP, Multi 9 C60H-DC,
  • RS Stock No. 220-1341
  • Mfr. Part No. M9A26946
Each
MYR652.23
Better World
Schneider Electric, Masterpact MCCB 4P 1.6kA, Fixed Mount
  • RS Stock No. 248-3769
  • Mfr. Part No. LV847245
Each
MYR46,893.80
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-8059
  • Mfr. Part No. C25W46E160
Each
MYR27,132.68
1
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