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

2299 / 999+
Better World
Schneider Electric Linergy Mounting Plate for use with Busbar
  • RS Stock No. 211-8755
  • Mfr. Part No. AK5PA211PH12
Each
MYR222.45
Better World
Siemens SENTRON 3VA1 MCB, 4P, 20A
  • RS Stock No. 224-7825
  • Mfr. Part No. 3VA1120-5GF42-0AA0
Each
MYR2,819.61
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8232
  • Mfr. Part No. C63R32D630
Each
MYR22,798.88
RS PRO 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 199-219
1 Pack of 10
MYR1,643.91
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5228
  • Mfr. Part No. 3VA2440-6HN32-0AA0
Each
MYR12,283.48
Better World
ABB, Tmax XT MCCB 3P 160A, Fixed Mount
  • RS Stock No. 236-6604
  • Mfr. Part No. 1SDA068120R1 XT4N 160 MA 160 FF
Each
MYR2,910.96
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 80A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9623
  • Mfr. Part No. 3VA10804ED460AA0
Each
MYR2,424.39
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9680
  • Mfr. Part No. 3VA11106ED460AA0
Each
MYR2,506.56
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3522
  • Mfr. Part No. 1SDA071499R1
Each
MYR53,282.32
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3521
  • Mfr. Part No. 1SDA071498R1
Each
MYR50,508.18
Siemens SENTRON Wire Connector for use with 3VA5 125
  • RS Stock No. 269-7102
  • Mfr. Part No. 3VA9134-0JG11
Each (In a Pack of 4)
MYR54.915
Lovato MCB, 3P, 25A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 188-1661
  • Mfr. Part No. P1MBUH3PC25
Each
MYR993.53
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 70 kA
  • RS Stock No. 209-6820
  • Mfr. Part No. 3VA1140-6EE32-0AA0
Each
MYR1,521.13
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3970
  • Mfr. Part No. 3VA2110-7HK32-0AA0
Each
MYR4,617.91
Better World
Siemens, SENTRON MCCB 4P 500A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5238
  • Mfr. Part No. 3VA2450-6KP42-0AA0
Each
MYR21,171.61
Siemens SENTRON 5ST3 MCB
  • RS Stock No. 216-6015
  • Mfr. Part No. 5ST3044
Each
MYR497.80
Siemens Sentron Series Connector for use with Busbar
  • RS Stock No. 228-8204
  • Mfr. Part No. 5ST3781-0
Each (In a Pack of 10)
MYR24.231
ABB Tmax XT Rotary Handle for use with Tmax XT
  • RS Stock No. 236-6858
  • Mfr. Part No. 1SDA069059R1 RHS L XT2-XT4 F/P EMERG
Each
MYR728.94
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 63A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9395
  • Mfr. Part No. 3VA1163-5ED46-0AA0
Each
MYR2,679.43
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9683
  • Mfr. Part No. 3VA11106FE420AA0
Each
MYR3,570.11
1
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