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

34963 Products showing for Fuses & Circuit Breakers

137 of 999+
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 3 channels
  • RS Stock No. 156-855
  • Mfr. Part No. 3VA2325-7HM32-0AA0
Each
$5,853.17(exc. GST)
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)2(-4), NZM2(-4), PN2(-4)
  • RS Stock No. 255-624
  • Mfr. Part No. 266654 NZM2-XSR-L
Each
$465.47(exc. GST)
Siemens ALPHA Assembly Kit for use with 3VA2 Molded Case Circuit Breakers
  • RS Stock No. 629-335
  • Mfr. Part No. 8GK6724-4KK23
Each
$432.11(exc. GST)
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 4P 160A, Fixed Mount
  • RS Stock No. 221-0990
  • Mfr. Part No. LV430785
Each
$3,626.47(exc. GST)
Legrand MCB, 1P, 20A, 400V AC, 20 kA Breaking Capacity
  • RS Stock No. 293-1423
  • Mfr. Part No. 0 058 12
Each
$31.58(exc. GST)
Schneider Electric Acti9 Acti9 iC60 MCB, 4P, 63A, Type AC, 500V AC, 30 mA Breaking Capacity
  • RS Stock No. 341-114
  • Mfr. Part No. A9V81463
Each
$2,395.32(exc. GST)
Phoenix Contact CM 2-PA-VAL-MS Adapter for use with VAL-MS
  • RS Stock No. 131-465
  • Mfr. Part No. 2905265
Each
$1,891.66(exc. GST)
Littelfuse Fuse Holder Water Proof Holder
  • RS Stock No. 738-2784
  • Mfr. Part No. FHAC0001ZXJ
Each
$9.92(exc. GST)
Better World
Schneider Electric 250V ac Push Button Push Button
  • RS Stock No. 790-9187
  • Mfr. Part No. A9E18038
Each
$148.31(exc. GST)
Finder Busbar, 6 A - 250V
  • RS Stock No. 776-1531
  • Mfr. Part No. 093.16.1
Each
$15.62(exc. GST)
Finder Busbar, 6 A - 250V
  • RS Stock No. 776-1538
  • Mfr. Part No. 093.16.0
Each
$15.99(exc. GST)
Schneider Electric Acti9 iID RCCB, 40A, 2 Pole, 300mA, Type B-SI, 230V ac
  • RS Stock No. 655-453
  • Mfr. Part No. A9Z64240
Each
$4,009.08(exc. GST)
Clipsal Electrical MAX9 Busbar, 230V ac, 18mm Pitch
  • RS Stock No. 282-3902
  • Mfr. Part No. MX9B112N
Each
$61.83(exc. GST)
Littelfuse PC Board Non Resettable Fuse, Axial 62mA, 125V ac/dc
  • RS Stock No. 541-3221
  • Mfr. Part No. 0251.062HAT1L
Each (In a Pack of 10)
$8.967(exc. GST)
RS PRO Industrial Surge Protector, 40kA, 450 V, DIN Rail Mount
  • RS Stock No. 101-754
Each
$150.47(exc. GST)
RS PRO BS 1362, F, T Fuse Kit
  • RS Stock No. 893-8546
Each
$142.75(exc. GST)
Littelfuse 10A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3120
  • Mfr. Part No. 0217010.MXP
Each (In a Pack of 10)
$0.649(exc. GST)
Schneider Electric Acti9 Acti9 iC60 MCB, 3P, 63A, 230V AC
  • RS Stock No. 357-455
  • Mfr. Part No. A9V81363
1 Pack of 15
$18,508.18(exc. GST)
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-252
  • Mfr. Part No. 3VA5320-5EC41-2AA0
Each
$6,767.88(exc. GST)
ABB Front Terminal for use with XT1 Cables
  • RS Stock No. 192-0877
  • Mfr. Part No. 1SDA066906R1
Each
$52.70(exc. GST)
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