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

2311 / 999+
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 32A Curve B, 230V AC, 72V DC
  • RS Stock No. 212-9007
  • Mfr. Part No. 5SL6532-6
Each
MYR282.62
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 55 kA
  • RS Stock No. 209-6911
  • Mfr. Part No. 3VA2116-5HM32-0AA0
Each
MYR5,536.13
Lovato MCB, 2P, 25A Curve C, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 188-1650
  • Mfr. Part No. P1MBUH2PC25
Each
MYR653.63
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3578
  • Mfr. Part No. 3VA2010-7HN42-0AA0
Each
MYR7,869.29
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-4275
  • Mfr. Part No. 1SDA072405R1
Each
MYR51,295.34
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7488
  • Mfr. Part No. C10W35E100
Each
MYR14,025.02
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 70 kA
  • RS Stock No. 209-6767
  • Mfr. Part No. 3VA1116-6EF46-0AA0
Each
MYR5,151.57
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4587
  • Mfr. Part No. 3VA2125-7MQ32-0AA0
Each
MYR7,852.77
Siemens 12V ac Circuit Trip
  • RS Stock No. 203-2315
  • Mfr. Part No. 5TT4101-3
Each
MYR124.16
Better World
Siemens SENTRON 3VA1 MCB, 2P, 80A
  • RS Stock No. 224-7886
  • Mfr. Part No. 3VA1180-4ED26-0AA0
Each
MYR1,766.81
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3920
  • Mfr. Part No. 3VA2110-0HL42-0AA0
Each
MYR7,313.92
Littelfuse 0.9A Resettable Fuse, 16V dc
  • RS Stock No. 506-933
  • Mfr. Part No. RUSBF090
Each (In a Pack of 5)
MYR2.456
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3831
  • Mfr. Part No. 1SDA071845R1
Each
MYR144,686.21
Siemens 4A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 232-2008
  • Mfr. Part No. 3NC1404
Each (In a Pack of 10)
MYR91.703
Better World
Siemens SENTRON 5SL4 MCB, 1P, 32A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6619
  • Mfr. Part No. 5SL4132-7
Each
MYR146.96
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9643
  • Mfr. Part No. 3VA11103FD460AA0
Each
MYR2,819.81
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3752
  • Mfr. Part No. 1SDA071737R1
Each
MYR96,271.58
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-3613
  • Mfr. Part No. 1SDA071589R1
Each
MYR59,472.84
Eaton 3A Resettable Fuse, 6V
  • RS Stock No. 225-8253
  • Mfr. Part No. PTSLR12066V300
1 Reel of 2500
MYR4,118.25
ABB Front Terminal for use with S6 800, T6 800
  • RS Stock No. 250-4508
  • Mfr. Part No. 1SDA023394R1
Each
MYR1,665.96
1
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