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

864 Products showing for Fuses & Circuit Breakers

1 / 44
In Stock
WR-FSH Fuseholder Clip Black SMT 5x20mm
  • RS Stock No. 563-074P
  • Mfr. Part No. 696103201002
Each (Supplied in a Box)
MYR55.15
In Stock
Legrand, DNX3 MCCB 1P 20A, Breaking Capacity 4500 A, DIN Rail Mount
  • RS Stock No. 687-983
  • Mfr. Part No. 406780
Each
MYR242.66
In Stock
WR-FSH Fuseholder Clip Black SMT 5x20mm
  • RS Stock No. 563-074
  • Mfr. Part No. 696103201002
1 Pack of 5
MYR55.15
In Stock
Eaton Eaton Moeller U-PKZ0 Undervoltage Release for use with Motor Protective Circuit Breaker
  • RS Stock No. 246-951
  • Mfr. Part No. 073137 U-PKZ0(380V50HZ)
Each
MYR243.34
Temporarily out of stock
Hager 230 V Circuit Trip for use with MCBs, RCBOs, RCCBs
  • RS Stock No. 599-820
  • Mfr. Part No. MZ212
Each
MYR1,440.54
In Stock
Hager CDC RCD Switch, 40A, 4 Pole, 30mA, Type AC, 230 → 400V
  • RS Stock No. 599-743
  • Mfr. Part No. CDC447F
Each
MYR1,319.29
Temporarily out of stock
Hager CFF RCD Switch, 25A, 2 Pole, 300mA, Type F, 230V
  • RS Stock No. 599-731
  • Mfr. Part No. CFF125F
Each
MYR1,431.44
Temporarily out of stock
Siemens 5SV RCCB, 16A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 626-978
  • Mfr. Part No. 5SV3311-6GV01
1 Pack of 36
MYR15,904.40
Temporarily out of stock
Hager CGC RCD Switch, 40A, 4 Pole, 500mA, Type AC, 230 → 400V
  • RS Stock No. 599-855
  • Mfr. Part No. CGC840F
Each
MYR1,483.07
Temporarily out of stock
Hager CZ001 RCCB, 6A, 2 Pole, Type AC, 240V
  • RS Stock No. 599-737
  • Mfr. Part No. CZ001
Each
MYR431.81
Temporarily out of stock
Siemens 5SV RCCB, 63A, 4 Pole, 500mA, Type A, 400V
  • RS Stock No. 626-979
  • Mfr. Part No. 5SV3746-6GV01
1 Pack of 18
MYR9,510.39
Temporarily out of stock
Siemens DIN Rail 400V (Volts) Safety Relay for use with Remote Control Switch
  • RS Stock No. 613-320
  • Mfr. Part No. 5TT4105-4
Each
MYR300.78
Temporarily out of stock
Siemens DIN Rail 400V (Volts) Safety Relay for use with Remote Control Switch
  • RS Stock No. 613-374
  • Mfr. Part No. 5TT4121-2
Each
MYR306.28
Temporarily out of stock
Hager CCC RCD, 25A, 2 Pole, 10mA, Type AC, 230V
  • RS Stock No. 599-821
  • Mfr. Part No. CCC125F
Each
MYR1,507.68
Temporarily out of stock
Hager BDH RCD, 125A, 3 Pole, 30mA, Type A-HI, 500V
  • RS Stock No. 599-886
  • Mfr. Part No. BDH380E
Each
MYR4,675.36
Temporarily out of stock
Hager BDH RCD, 125A, 2 Pole, 30mA, Type A-HI, 500V
  • RS Stock No. 599-885
  • Mfr. Part No. BDH280E
Each
MYR4,640.44
Temporarily out of stock
Hager CFB RCD Switch, 40A, 4 Pole, 300mA, Type B, 230 → 400V
  • RS Stock No. 599-754
  • Mfr. Part No. CFB740F
Each
MYR5,490.91
Temporarily out of stock
Siemens DIN Rail 400V (Volts) Safety Relay for use with Remote Control Switch
  • RS Stock No. 613-338
  • Mfr. Part No. 5TT4114-1
Each
MYR436.05
Temporarily out of stock
Hager CDA RCD Switch, 63A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 599-826
  • Mfr. Part No. CDA769F
Each
MYR858.80
Temporarily out of stock
Hager CDC RCD Switch, 63A, 2 Pole, 30mA, Type AC, 230V
  • RS Stock No. 599-828
  • Mfr. Part No. CDC163F
Each
MYR1,522.95
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