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

182 / 999+
In Stock
Littelfuse 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3495
  • Mfr. Part No. 0219002.MXAP
Each (In a Pack of 10)
MYR4.227
In Stock
Schurter 3A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 173-7960
  • Mfr. Part No. 0090.0003
Each (In a Box of 10)
MYR58.153
In Stock
Phoenix Contact Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 207-2674
  • Mfr. Part No. 1065316
Each
MYR586.68
In Stock
Schneider Electric Motor Mechanism for use with ComPacT NSX New Generation
  • RS Stock No. 130-374
  • Mfr. Part No. LV429435
Each
MYR5,385.66
In Stock
SIBA 160A NH Fuse, NH1, 690V
  • RS Stock No. 893-8571
  • Mfr. Part No. 20-211-08/160A
Each (In a Pack of 3)
MYR148.783
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 125A, Breaking Capacity 25kA, Fixed Mount
  • RS Stock No. 260-9759
  • Mfr. Part No. LV516322
Each
MYR3,832.40
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 2P, 2A Curve C, 400V AC, 72V DC
  • RS Stock No. 213-1036
  • Mfr. Part No. 5SL6202-7
Each
MYR349.00
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 6 Way, 250 A
  • RS Stock No. 244-971
  • Mfr. Part No. SE18B250
Each
MYR2,095.47
Temporarily out of stock
Schneider Electric, Compact MCCB 4P 800A, Fixed Mount
  • RS Stock No. 247-1788
  • Mfr. Part No. 33384
Each
MYR25,840.16
In Stock
MECATRACTION Brass Earth Clamp Max. Conductor Size 2 x 120mm 43mm
  • RS Stock No. 299-101
  • Mfr. Part No. SE2-120
Each (In a Box of 10)
MYR93.97
In Stock
ETA REX12 Electronic Circuit breaker 8A 24V REX12-T, DIN Rail Mount
  • RS Stock No. 175-0368
  • Mfr. Part No. REX12-TA1-107-DC24V-8A
Each
MYR283.19
Temporarily out of stock
Hager RCD, 25A, 4 Pole, 300mA
  • RS Stock No. 144-4871
  • Mfr. Part No. BFC425F
Each
MYR1,418.21
In Stock
Hager RCBO, 10A Current Rating, 3P+N Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 602-201
  • Mfr. Part No. ADC410F
Each
MYR2,073.41
Temporarily out of stock
Better World
Siemens RCBO, 125A Current Rating, 3P+N Poles, Type C, Sentron Range
  • RS Stock No. 243-6263
  • Mfr. Part No. 5SU1844-7WK82
Each
MYR10,924.76
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-334
  • Mfr. Part No. 3VA6140-8HM31-0AA0
Each
MYR8,419.29
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-517
  • Mfr. Part No. 3VA6140-7JT31-0AA0
Each
MYR9,668.60
In Stock
Siemens 10A NH Fuse, NH000, 500V ac
  • RS Stock No. 397-464
  • Mfr. Part No. 3NA3803
Each (In a Pack of 3)
MYR51.857
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 2P, 25A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-069
  • Mfr. Part No. 2CDS272061R0518
Each
MYR2,034.90
Temporarily out of stock
Siemens SENTRON 5SJ4140 MCB, 1P, 40A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 300-024
  • Mfr. Part No. 5SJ4140-8HG40
Each
MYR381.31
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-254
  • Mfr. Part No. 3VA6210-8JP31-2AA0
Each
MYR19,228.57
1
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