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

2274 / 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LI, 4 channels
  • RS Stock No. 259-4649
  • Mfr. Part No. 1SDA072921R1
Each
MYR40,608.82
Temporarily out of stock
Siemens SENTRON 5SP3425 MCB, 4P, 25A, Type E
  • RS Stock No. 231-8322
  • Mfr. Part No. 5SP3425-3
Each
MYR3,861.46
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 500mA Current Rating
  • RS Stock No. 217-6377
  • Mfr. Part No. 2800890
Each
MYR408.01
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 4 channels
  • RS Stock No. 259-3731
  • Mfr. Part No. 1SDA071707R1
Each
MYR92,368.70
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3987
  • Mfr. Part No. 3VA2110-7HN46-0AA0
Each
MYR7,325.26
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-4368
  • Mfr. Part No. 1SDA072547R1
Each
MYR124,707.13
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSI, 3 channels
  • RS Stock No. 259-3081
  • Mfr. Part No. 1SDA070935R1
Each
MYR32,524.31
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4123
  • Mfr. Part No. 1SDA072230R1
Each
MYR44,864.20
Temporarily out of stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T XA MCB, 3P, 20A Curve C, 400V AC
  • RS Stock No. 238-3423
  • Mfr. Part No. A9PA2320
Each
MYR648.23
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3821
  • Mfr. Part No. 1SDA071836R1
Each
MYR140,783.33
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-3106
  • Mfr. Part No. 1SDA070959R1
Each
MYR51,109.48
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3619
  • Mfr. Part No. 3VA2010-8JQ46-0AA0
Each
MYR12,001.18
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3907
  • Mfr. Part No. 3VA2063-8JQ42-0AA0
Each
MYR11,222.79
Temporarily out of stock
Siemens 250A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 230-2956
  • Mfr. Part No. 3NA6244-6
Each (In a Pack of 3)
MYR521.257
In Stock
Bourns Surface Mount Fuse 4A, 50 V dc, 63 V dc
  • RS Stock No. 245-9206P
  • Mfr. Part No. SF-0603SPA400R-2
Each (Supplied on a Reel)
MYR5.52
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 80A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9437
  • Mfr. Part No. 3VA1180-6GE46-0AA0
Each
MYR2,312.43
Temporarily out of stock
ABB Front Terminal for use with S6, T6
  • RS Stock No. 250-4522
  • Mfr. Part No. 1SDA050704R1
Each
MYR2,054.72
Last RS stock
Schurter PC Board Non Resettable Fuse, Axial 125mA, 125V ac/dc
  • RS Stock No. 167-6232
  • Mfr. Part No. 7010.6310.13
Each (In a Pack of 5)
MYR11.182
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3819
  • Mfr. Part No. 3VA2040-8KQ32-0AA0
Each
MYR12,877.34
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 570A, Fixed Mount
  • RS Stock No. 260-8229
  • Mfr. Part No. C63N44V570
Each
MYR49,707.59
1
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