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

2259 / 999+
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3972
  • Mfr. Part No. 3VA2110-7HK42-0AA0
Each
MYR5,917.10
Better World
Schneider Electric Compact Nsx Dc Long Terminal Shield for use with Nsx400..630 Dc
  • RS Stock No. 221-1286
  • Mfr. Part No. LV438293
Each
MYR647.30
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3636
  • Mfr. Part No. 3VA2025-5JP46-0AA0
Each
MYR9,218.22
Better World
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-3063
  • Mfr. Part No. 1SDA070919R1
Each
MYR54,547.76
ABB Emax2 Electronic Circuit Breaker 630A Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3413
  • Mfr. Part No. 1SDA071347R1
Each
MYR46,968.92
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-4166
  • Mfr. Part No. 1SDA072282R1
Each
MYR32,710.12
Schneider Electric, ComPacT MCCB 3P 25A, Fixed Mount
  • RS Stock No. 260-7449
  • Mfr. Part No. C10V32M025
Each
MYR7,740.14
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-7528
  • Mfr. Part No. C11B3TM050B
Each
MYR2,147.51
Better World
Schneider Electric 25A 356x167mm Fuse Block, 230 - 690V
  • RS Stock No. 219-8946
  • Mfr. Part No. KSB25SD4
Each
MYR3,346.19
Siemens SENTRON Protection Module for use with 5SY
  • RS Stock No. 211-9561
  • Mfr. Part No. 5SM2322-3
Each
MYR2,075.21
ABB Emax2 Electronic Circuit Breaker 250A Ekip Touch LI, 4 channels
  • RS Stock No. 259-3391
  • Mfr. Part No. 1SDA071324R1
Each
MYR33,480.84
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 36 kA
  • RS Stock No. 209-6999
  • Mfr. Part No. 3VA1150-4EF42-0AA0
Each
MYR2,303.22
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4301
  • Mfr. Part No. 1SDA072437R1
Each
MYR87,071.89
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3940
  • Mfr. Part No. 1SDA071985R1
Each
MYR205,088.24
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4769
  • Mfr. Part No. 3VA2163-7MQ36-0AA0
Each
MYR8,487.55
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-4015
  • Mfr. Part No. 1SDA072074R1
Each
MYR25,254.06
Better World
Schneider Electric Linergy Mounting Plate for use with Enclosures Accessories
  • RS Stock No. 211-8760
  • Mfr. Part No. AK5PA241
Each
MYR303.17
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-4252
  • Mfr. Part No. 1SDA072377R1
Each
MYR58,822.32
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 50A Curve B, 230V AC, 72V DC
  • RS Stock No. 209-7489
  • Mfr. Part No. 5SL4550-6
Each
MYR397.72
Siemens SENTRON Connecting Terminals for use with Busbar System
  • RS Stock No. 203-3350
  • Mfr. Part No. 8US1921-2AB00
Each (In a Pack of 50)
MYR19.244
1
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2329
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