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

2292 / 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 4 channels
  • RS Stock No. 259-3723
  • Mfr. Part No. 1SDA071699R1
Each
MYR83,355.00
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7751
  • Mfr. Part No. C16F32D100
Each
MYR5,594.23
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 16A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7820
  • Mfr. Part No. LV426570
Each
MYR3,030.29
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3602
  • Mfr. Part No. 3VA2010-8HL46-0AA0
Each
MYR8,071.03
Temporarily out of stock
Siemens SENTRON Current Transformer for use with 3VA2
  • RS Stock No. 210-9371
  • Mfr. Part No. 3VA9307-0NA10
Each
MYR3,149.75
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-3072
  • Mfr. Part No. 1SDA070926R1
Each
MYR32,617.26
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 2P, 1A Curve C, 400V AC, 72V DC
  • RS Stock No. 209-7439
  • Mfr. Part No. 5SL4201-7
Each
MYR415.40
In Stock
Schurter SMD Non Resettable Fuse 200mA, 125V ac/dc
  • RS Stock No. 173-7837
  • Mfr. Part No. 3410.0021.01
Each (In a Bag of 100)
MYR12.517
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4180
  • Mfr. Part No. 3VA1112-4EF36-0AA0
Each
MYR3,792.37
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3869
  • Mfr. Part No. 1SDA071879R1
Each
MYR200,648.83
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9468
  • Mfr. Part No. 3VA1196-5GE46-0AA0
Each
MYR2,722.42
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-3098
  • Mfr. Part No. 1SDA070950R1
Each
MYR57,985.93
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-3272
  • Mfr. Part No. 1SDA071171R1
Each
MYR90,696.03
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-4267
  • Mfr. Part No. 1SDA072396R1
Each
MYR51,945.74
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4092
  • Mfr. Part No. 3VA2116-7HM32-0AA0
Each
MYR8,502.69
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4508
  • Mfr. Part No. 1SDA072729R1
Each
MYR41,133.61
In Stock
Schurter PC Board Non Resettable Fuse, Radial 800mA, 250V ac
  • RS Stock No. 173-9789
  • Mfr. Part No. 0034.6614
Each (In a Bag of 100)
MYR1.812
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4711
  • Mfr. Part No. 3VA2163-5MP36-0AA0
Each
MYR5,677.13
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 36 kA
  • RS Stock No. 210-1645
  • Mfr. Part No. 3VA1125-4EF42-0AA0
Each
MYR2,303.22
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3706
  • Mfr. Part No. 3VA2025-8HN42-0AA0
Each
MYR6,598.55
1
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