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

35151 Products showing for Fuses & Circuit Breakers

150 of 999+
Murrelektronik Limited Mico Pro Circuit Breaker
  • RS Stock No. 285-5878
  • Mfr. Part No. 9000-41012-0200000
Each
$174.83(exc. GST)
Limitor Thermal Fuse +142°C 10 A/15 A, 250V ac
  • RS Stock No. 797-6061
  • Mfr. Part No. SF 139 R
Each (In a Pack of 10)
$2.267(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)
Schneider Electric Resi9 3 Phase Busbar, 400V, 18mm Pitch
  • RS Stock No. 655-498
  • Mfr. Part No. R9XFH312
Each
$37.60(exc. GST)
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V Voltage Rating DIN Rail Mount, 40A Current
  • RS Stock No. 272-836
  • Mfr. Part No. GV3L40
Each
$1,091.38(exc. GST)
Better World
Siemens SIRIUS Electronic Circuit Breaker 630mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-100
  • Mfr. Part No. 3RV2311-0GC10
Each
$395.63(exc. GST)
Mersen Surge Protector, 50kA, 1000V (Volts), DIN Rail Mount
  • RS Stock No. 361-604
  • Mfr. Part No. 44020001
Each
$64.41(exc. GST)
ETA Thermal Circuit Breaker - 1140-E Single Pole 250V Voltage Rating Integral Mount, 6A Current Rating
  • RS Stock No. 728-8660
  • Mfr. Part No. 1140-E211-P1M1-6A
Each
$34.77(exc. GST)
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8960
  • Mfr. Part No. R9H18403
Each
$243.14(exc. GST)
32A Neutral Link x 9mm
  • RS Stock No. 262-976
  • Mfr. Part No. 32CML
1 Pack of 10
$108.33(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
  • RS Stock No. 156-691
  • Mfr. Part No. 3VA2340-7JQ32-0AA0
Each
$8,126.91(exc. GST)
Phoenix Contact 3 Phase Surge Protector, ≤2.5kV, DIN Rail Mount
  • RS Stock No. 890-3718
  • Mfr. Part No. 2905988
Each
$2,706.78(exc. GST)
SIB Copper Earth Bar L. 110mm x W. 125mm x H. 25mm
  • RS Stock No. 270-5243
  • Mfr. Part No. P04390
1 Bag of 10
$177.18(exc. GST)
Schneider Electric Flexible Elbow Busbar Trunking, 250mm, 250A, Canalis Series
  • RS Stock No. 119-394
  • Mfr. Part No. KSA250DLF401
Each
$1,818.30(exc. GST)
Eaton 355A Cartridge Fuse, 62 x 256mm
  • RS Stock No. 260-702
  • Mfr. Part No. TMT355
Each
$452.07(exc. GST)
Schneider Electric, PowerPact Circuit breaker 1P 25A, Breaking Capacity 14 kA, Clip-On
  • RS Stock No. 339-225
  • Mfr. Part No. BDL16025
Each
$513.73(exc. GST)
Rittal Earthing Strap, 4mm² Wire Range
  • RS Stock No. 263-3733
  • Mfr. Part No. 2564000
Each (In a Pack of 5)
$7.37(exc. GST)
ABB 200A Tag Fuse, 150 x 40 x 72mm, 500V
  • RS Stock No. 250-4441
  • Mfr. Part No. 1SCA022697R8970
1 Box of 3
$222.34(exc. GST)
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-8037
  • Mfr. Part No. C25W35E250
Each
$10,693.31(exc. GST)
Siemens Alpha Assembly Kit for use with Unequipped Distribution Boards
  • RS Stock No. 212-9057
  • Mfr. Part No. 8GK4351-1KK22
Each
$275.95(exc. GST)
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