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

2310 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4617
  • Mfr. Part No. 3VA2140-0MS32-0AA0
Each
MYR3,597.13
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3597
  • Mfr. Part No. 3VA2010-7KQ46-0AA0
Each
MYR14,445.67
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4527
  • Mfr. Part No. 3VA2125-6HK42-0AA0
Each
MYR5,776.71
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4569
  • Mfr. Part No. 3VA2125-7JQ32-0AA0
Each
MYR10,679.72
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 50A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7825
  • Mfr. Part No. LV426574
Each
MYR3,203.73
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-4152
  • Mfr. Part No. 1SDA072265R1
Each
MYR34,475.77
Temporarily out of stock
Eaton 3A Resettable Fuse, 6V
  • RS Stock No. 225-8292
  • Mfr. Part No. PTSLR18126V300
Each (In a Pack of 10)
MYR4.979
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 1P, 50A
  • RS Stock No. 224-7860
  • Mfr. Part No. 3VA1150-3ED16-0AA0
Each
MYR822.96
Temporarily out of stock
Siemens 224A Centred Tag Fuse, NH2, 500V ac
  • RS Stock No. 203-1996
  • Mfr. Part No. 3NA6242
Each (In a Pack of 3)
MYR191.26
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-4008
  • Mfr. Part No. 1SDA072067R1
Each
MYR33,480.84
Temporarily out of stock
Wickmann Fuse Block
  • RS Stock No. 174-0280
  • Mfr. Part No. 05200004Z
Each (In a Box of 200)
MYR7.009
Temporarily out of stock
Eaton 80mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9449
  • Mfr. Part No. S506-80-R
1 Bag of 1000
MYR3,323.33
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3954
  • Mfr. Part No. 3VA2110-6HM36-0AA0
Each
MYR6,632.67
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4657
  • Mfr. Part No. 3VA2140-7HN36-0AA0
Each
MYR5,207.51
Temporarily out of stock
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4822
  • Mfr. Part No. 3VA2563-7HL32-0AA0
Each
MYR18,492.73
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9592
  • Mfr. Part No. 3VA10403ED360AA0
Each
MYR1,798.72
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4752
  • Mfr. Part No. 3VA2163-7JQ32-0AA0
Each
MYR10,679.72
In Stock
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
Temporarily out of stock
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
Temporarily out of stock
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
1
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