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

2283 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3786
  • Mfr. Part No. 3VA2140-6HL32-0AA0
Each
MYR3,994.61
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 125A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-5984
  • Mfr. Part No. 3VA1112-5EE42-0AA0
Each
MYR4,928.11
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA
  • RS Stock No. 209-7036
  • Mfr. Part No. 3VA2010-6HL32-0AA0
Each
MYR3,029.43
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3472
  • Mfr. Part No. 1SDA071427R1
Each
MYR50,508.18
In Stock
Omron Busbar
  • RS Stock No. 111-3537
  • Mfr. Part No. PYDN-7.75-040R
Each
MYR6.73
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3641
  • Mfr. Part No. 1SDA071615R1
Each
MYR38,099.86
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 25A, Breaking Capacity 50 kA, DIN Rail Mount
  • RS Stock No. 178-7986
  • Mfr. Part No. LV426785
Each
MYR6,856.55
Temporarily out of stock
Better World
Schneider Electric Acti9 iIG40 RCCB, 25A, 3+N Pole, 300mA, Type AC, 380 → 415V ac
  • RS Stock No. 238-3474
  • Mfr. Part No. A9R77725
Each
MYR1,800.67
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 32A Curve B, 400V AC, 72V DC
  • RS Stock No. 210-3390
  • Mfr. Part No. 5SL4632-6
Each
MYR803.49
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4108
  • Mfr. Part No. 1SDA072216R1
Each
MYR25,158.46
Temporarily out of stock
ABB Tmax T Conversion Kit for use with Circuit Breaker
  • RS Stock No. 232-0140
  • Mfr. Part No. 1SDA060390R1 WMP T6 3P
Each
MYR1,487.84
Temporarily out of stock
Siemens SENTRON 3VA9 Mounting Frame for use with 3VA1 400/630, 3VA2 400/630
  • RS Stock No. 218-1850
  • Mfr. Part No. 3VA9363-0SB20
Each
MYR328.83
Temporarily out of stock
ABB Front Terminal for use with S6 800, T6 800
  • RS Stock No. 250-4503
  • Mfr. Part No. 1SDA023383R1
Each
MYR488.71
In Stock
Lovato MCB, 1P, 2A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 188-1631
  • Mfr. Part No. P1MBUH1PC02
Each
MYR265.14
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 4 channels
  • RS Stock No. 157-420
  • Mfr. Part No. 3VA2140-8JQ42-0AA0
Each
MYR13,041.77
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3555
  • Mfr. Part No. 3VA2010-6JP36-0AA0
Each
MYR8,600.02
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-3329
  • Mfr. Part No. 1SDA071236R1
Each
MYR115,345.67
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4060
  • Mfr. Part No. 3VA2116-0HN42-0AA0
Each
MYR11,393.03
Temporarily out of stock
Better World
ABB, XT2L MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-6501
  • Mfr. Part No. 1SDA067958R1 XT2L 160 Ekip I 160A FF
Each
MYR5,946.17
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3326
  • Mfr. Part No. 1SDA071233R1
Each
MYR114,670.11
1
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