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

258 / 999+
In Stock
Lovato ModuLo P1MB MCB, 4P, 20A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-6009
  • Mfr. Part No. P1MB4PD20
Each
MYR646.32
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 320A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 230-979
  • Mfr. Part No. 110302 NZMN3-A320-BT
Each
MYR12,221.55
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 125A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-703
  • Mfr. Part No. IL1253P36
Each
MYR3,967.32
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 63A, Breaking Capacity 36kA
  • RS Stock No. 260-9742
  • Mfr. Part No. LV510345
Each
MYR2,891.72
In Stock
Europa EUC3P EUC MCB, 3P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6591
  • Mfr. Part No. EUC3P32C
Each
MYR134.04
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 8A Curve B, 277V AC
  • RS Stock No. 256-6753
  • Mfr. Part No. M9F21208
Each
MYR537.02
Currently unavailable
Bourns 200A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4144
  • Mfr. Part No. PF-FB2-200
Each (In a Box of 10)
MYR502.702
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 16A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6089
  • Mfr. Part No. A9P22616
Each
MYR234.04
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 63A, Fixed Mount
  • RS Stock No. 232-0247
  • Mfr. Part No. 1SDA067395R1 XT1C 160 TMD 63A FF
Each
MYR1,549.71
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 250-4153
  • Mfr. Part No. 1SDA054423R1
Each
MYR25,987.03
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 3P, 32A, Type Z, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 202-825
  • Mfr. Part No. 2CDS253001R0538
Each
MYR1,828.74
Temporarily out of stock
Siemens Alpha Cover for use with Unequipped Distribution Boards
  • RS Stock No. 216-4800
  • Mfr. Part No. 8GK4501-2KK32
Each
MYR544.83
Temporarily out of stock
Better World
ABB, XT4L MCCB 3P 32A, Fixed Mount
  • RS Stock No. 236-6757
  • Mfr. Part No. 1SDA068454R1 XT4L 160 MA 32 FF
Each
MYR4,106.61
Temporarily out of stock
ABB S202L MCB, 2P, 63A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 203-074
  • Mfr. Part No. 2CDS242701R0634
Each
MYR921.62
Temporarily out of stock
Schneider Electric Adapter for use with ComPact NS1600b To 3200 Circuit Breaker, ComPact NS1600b To 3200 Switch
  • RS Stock No. 247-1876
  • Mfr. Part No. 33976
Each
MYR3,701.67
Temporarily out of stock
Eaton IZMX40N4-V16W-1 Electronic Circuit Breaker 1.6kA , DIN Rail
  • RS Stock No. 132-883
  • Mfr. Part No. 183753 IZMX40N4-V16W-1
Each
MYR72,765.13
In Stock
Siemens 6A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6899
  • Mfr. Part No. 3NA3801-6
Each (In a Pack of 3)
MYR241.683
Temporarily out of stock
ABB RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6874
  • Mfr. Part No. 2CSR255180R1205
Each
MYR1,086.77
In Stock
ABB RCBO, 63A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5219
  • Mfr. Part No. 2CSR274101R1634
Each
MYR2,877.97
In Stock
Littelfuse 3A Resettable Fuse, 16V
  • RS Stock No. 517-6900P
  • Mfr. Part No. RGEF300
Each (Supplied in a Bag)
MYR2.218
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