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

34912 Products showing for Fuses & Circuit Breakers

88 of 999+
Hager 1 Phase Busbar
  • RS Stock No. 144-4828
  • Mfr. Part No. KB163N
Each
$21.45(exc. GST)
Hager RCBO, 32A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 251-2019
  • Mfr. Part No. ADC732F
Each
$510.04(exc. GST)
Schneider Electric, PowerPact Circuit breaker 4P 60A, Breaking Capacity 100 kA, Clip-On
  • RS Stock No. 438-990
  • Mfr. Part No. BJL46060LU
Each
$3,610.20(exc. GST)
Siemens SENTRON 5SY4 MCB, 3P, 4A Curve B, 400V AC, 60V DC, 35 kA Breaking Capacity
  • RS Stock No. 610-299
  • Mfr. Part No. 5SY4304-6
Each
$227.95(exc. GST)
Hager CDA RCD Switch, 63A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 599-824
  • Mfr. Part No. CDA765F
Each
$371.44(exc. GST)
Eaton 1A Glass Melamine Cartridge Fuse, 0.56 x 0.87in
  • RS Stock No. 263-418
  • Mfr. Part No. TPS-1
1 Pack of 10
$817.09(exc. GST)
Eaton Connection Clamp for use with BB-EV, Busbar, MCBs, RCBOs, RCCBs, SPDs
  • RS Stock No. 247-832
  • Mfr. Part No. 168825 BB-EV-TE/35
1 Pack of 3
$45.82(exc. GST)
Siemens 5SM26 RCCB, 63A, 3 Pole, 300mA, Type A, 400V
  • RS Stock No. 328-421
  • Mfr. Part No. 5SM2636-8
Each
$583.85(exc. GST)
Siemens, SENTRON MCCB 3P 225A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-460
  • Mfr. Part No. 3VA5322-6EC31-0AA0
Each
$6,939.34(exc. GST)
Siemens SENTRON 5SY Circuit Breaker, 3P+N, 40A, Type A, 440V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 664-340
  • Mfr. Part No. 5SY4640-5
Each
$729.30(exc. GST)
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-169
  • Mfr. Part No. 3VA6610-6HN42-0AA0
Each
$21,101.45(exc. GST)
Eaton 630A Fuse Holder for 675 x 110 x 195mm Fuse, 3P, 690V ac
  • RS Stock No. 261-895
  • Mfr. Part No. EBV333TM2
Each
$708.70(exc. GST)
Schneider Electric ComPacT Trip Unit for use with ComPacT NSX100
  • RS Stock No. 655-002
  • Mfr. Part No. C1634A160
Each
$3,007.54(exc. GST)
Eaton NZM Auxiliary Contact for use with Circuit Breaker
  • RS Stock No. 256-108
  • Mfr. Part No. 266706 NZM2-XSVR
Each
$189.48(exc. GST)
Siemens 5SV33 RCCB, 63A, 4 Pole, 30mA, Type B, 440V
  • RS Stock No. 328-444
  • Mfr. Part No. 5SV3346-4KK60
Each
$3,364.97(exc. GST)
Socomec 16A NH Fuse, 0, 500V
  • RS Stock No. 252-5328
  • Mfr. Part No. 66000016
Each (In a Pack of 3)
$26.40(exc. GST)
Siemens SENTRON 5SY8 MCB, 4P, 12.5A Curve D, 400V AC, 72V DC, 30 kA Breaking Capacity
  • RS Stock No. 610-621
  • Mfr. Part No. 5SY8424-8BB08
Each
$567.58(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-632
  • Mfr. Part No. 3VA6560-7KT36-2AA0
Each
$15,383.19(exc. GST)
Siemens SENTRON Cover Frame for use with 3VA15/25/26
  • RS Stock No. 161-970
  • Mfr. Part No. 3VA9503-0SB20
Each
$269.69(exc. GST)
Mersen 20A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 188-7369
  • Mfr. Part No. P218720
Each (In a Pack of 10)
$6.475(exc. GST)
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