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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

188 / 999+
In Stock
ABB BS9 1 Phase Busbar, 400V
  • RS Stock No. 231-9915
  • Mfr. Part No. 2CSL910011R1012 BS9 1/12 NA -
1 Box of 1
MYR45.88
In Stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 288-7182
  • Mfr. Part No. C166TM160
Each
MYR2,066.76
In Stock
Better World
Siemens 5SV3 RCCB, 40A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 202-7060
  • Mfr. Part No. 5SV3314-6KL
Each
MYR782.67
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 4P, 40A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-835
  • Mfr. Part No. 2CDS274061R0557
Each
MYR4,593.85
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 4P, 500mA Curve K, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 202-971
  • Mfr. Part No. 2CDS274001R0157
Each
MYR3,254.87
Temporarily out of stock
Schneider Electric MASTERPACT NW MCB, 3P, 3.2kA
  • RS Stock No. 247-1898
  • Mfr. Part No. 48312
Each
MYR130,448.06
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1kA IZMX/INX, 4 channels , Fixed
  • RS Stock No. 132-921
  • Mfr. Part No. 183811 IZMX40B4-P10F-1
Each
MYR69,478.80
Temporarily out of stock
ABB S301 MCB, 1P, 63A Curve D, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-660
  • Mfr. Part No. 2CDS381001R0631
Each
MYR954.11
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3956
  • Mfr. Part No. 3VA2110-6HM46-0AA0
Each
MYR8,604.91
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3528
  • Mfr. Part No. 1SDA071504R1
Each
MYR33,863.56
Temporarily out of stock
Eaton Eaton xEnergy Basic Busbar
  • RS Stock No. 258-223
  • Mfr. Part No. 289861 BPZ-BB/T-15/5/1000
1 Pack of 4
MYR3,319.20
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3691
  • Mfr. Part No. 3VA2025-7KQ36-0AA0
Each
MYR11,860.12
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3P, 63A, Type Z, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 200-947
  • Mfr. Part No. 2CDS383001R0608
Each
MYR3,507.00
Temporarily out of stock
Siemens, SENTRON MCCB 4P 225A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-337
  • Mfr. Part No. 3VA5222-7EC41-2AA0
Each
MYR13,646.79
In Stock
RS PRO Industrial Surge Protector, 10kA, 20 V, DIN Rail Mount
  • RS Stock No. 101-760
Each
MYR465.34
Temporarily out of stock
Wickmann 0.5A Resettable Fuse, 60V dc
  • RS Stock No. 174-0382
  • Mfr. Part No. 60R050XU
Each (In a Box of 500)
MYR1.647
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 4P, 25A, Type Z, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-234
  • Mfr. Part No. 2CDS274001R0518
Each
MYR3,438.99
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 2P, 13A Curve B, 415V AC, 125V DC, 25 kA Breaking Capacity
  • RS Stock No. 201-302
  • Mfr. Part No. 2CDS382001R0135
Each
MYR1,392.49
In Stock
Eaton 20A Neozed Fuse, gG, 400V ac
  • RS Stock No. 181-8882
  • Mfr. Part No. 20NZ02
Each
MYR15.41
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 160mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-680
  • Mfr. Part No. 3RV2711-0AD10
Each
MYR991.87
1
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