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

2298 / 999+
Temporarily out of stock
Siemens Surge Suppressor Unit, 250V dc, DIN Rail Mount
  • RS Stock No. 266-9453
  • Mfr. Part No. 3RT1956-1CD02
Each
MYR227.95
Temporarily out of stock
Better World
Siemens, 3VA2 MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 210-3342
  • Mfr. Part No. 3VA2140-6HL42-0AA0
Each
MYR5,072.19
Last RS stock
Schurter PC Board Non Resettable Fuse, Axial 63mA, 125V ac/dc
  • RS Stock No. 167-9225
  • Mfr. Part No. 7010.6300.13
Each (In a Pack of 5)
MYR6.518
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 1+N, 500mA Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8913
  • Mfr. Part No. 5SY7505-7
Each
MYR473.73
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 3P 160A, Fixed Mount
  • RS Stock No. 236-7509
  • Mfr. Part No. 1SDA067819R1 XT2S 160 Ekip LSIG 160A FF
Each
MYR8,952.19
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4074
  • Mfr. Part No. 3VA2116-6HM46-0AA0
Each
MYR10,246.52
Temporarily out of stock
Better World
Siemens, 3VA1 MCCB 3P 25A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 210-3327
  • Mfr. Part No. 3VA1110-6EE36-0AA0
Each
MYR1,968.45
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4824
  • Mfr. Part No. 3VA2563-7HM32-0AA0
Each
MYR21,809.12
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3951
  • Mfr. Part No. 3VA2110-6HK46-0AA0
Each
MYR5,539.47
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3910
  • Mfr. Part No. 1SDA071938R1
Each
MYR316,320.87
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-8027
  • Mfr. Part No. C25V4TM160
Each
MYR16,579.82
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4638
  • Mfr. Part No. 3VA2140-6JQ42-0AA0
Each
MYR10,184.99
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LI, 4 channels
  • RS Stock No. 259-4684
  • Mfr. Part No. 1SDA072961R1
Each
MYR40,794.76
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3788
  • Mfr. Part No. 3VA2040-7KQ36-0AA0
Each
MYR11,860.12
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 16A, Fixed Mount
  • RS Stock No. 260-7656
  • Mfr. Part No. C11N4TM016L
Each
MYR3,685.91
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9701
  • Mfr. Part No. 3VA11123FF420AA0
Each
MYR4,340.87
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3969
  • Mfr. Part No. 1SDA072021R1
Each
MYR325,799.48
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3586
  • Mfr. Part No. 3VA2010-7JQ42-0AA0
Each
MYR13,265.26
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4765
  • Mfr. Part No. 3VA2163-7MN36-0AA0
Each
MYR4,952.10
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-3134
  • Mfr. Part No. 1SDA070987R1
Each
MYR48,135.92
1
2298
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