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

147 of 999+
Temporarily out of stock
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)
In Stock
Eaton 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7058
  • Mfr. Part No. MDA-15-R
Each
$14.03(exc. GST)
In Stock
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)
Temporarily out of stock
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)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-8037
  • Mfr. Part No. C25W35E250
Each
$10,693.31(exc. GST)
Limited stock
Limitor Thermal Fuse +105°C 2.5 A, 250V ac
  • RS Stock No. 176-9176
  • Mfr. Part No. P82 105 05100
Each
$13.82(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Earthing Strap Brass
  • RS Stock No. 211-8775
  • Mfr. Part No. NSYAEECS
Each
$247.94(exc. GST)
In Stock
Eaton 16A British Standard Fuse, F1, 550V ac
  • RS Stock No. 413-507
  • Mfr. Part No. NSD16
Each (In a Pack of 5)
$39.112(exc. GST)
Temporarily out of stock
Eaton Eaton xEffect SASY 60i Busbar
  • RS Stock No. 243-784
  • Mfr. Part No. 107069 BBS-2/FL
Each (In a Pack of 2)
$24.20(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 400/630 Circuit Breakers
  • RS Stock No. 260-8065
  • Mfr. Part No. C4031M320
Each
$3,331.39(exc. GST)
In Stock
Schurter 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7702
  • Mfr. Part No. 0034.1516
Each (In a Pack of 10)
$0.78(exc. GST)
Temporarily out of stock
Siemens Surge Suppressor Unit, 400 → 600V ac, Clip-On Mount
  • RS Stock No. 156-041
  • Mfr. Part No. 3RT2936-1CF00
Each
$57.15(exc. GST)
Unavailable
Schneider Electric, NSX MCCB 3P 160A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 219-8355
  • Mfr. Part No. LV430890
Each
$4,106.12(exc. GST)
In Stock
WJ Furse Copper Earth Bar L. 400mm x W. 90mm x H. 90mm 6 Ways
  • RS Stock No. 124-2496
  • Mfr. Part No. 7TCA083670R0739 LK245-6
Each
$556.09(exc. GST)
Temporarily out of stock
Eaton Eaton Metering Board ZSD Meter Cabinet for use with Metering Board
  • RS Stock No. 243-006
  • Mfr. Part No. 191011 ZSD-ZV-1100-BKE-I/APZ
Each
$3,787.26(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 1P, 4A, Type Z, 15 kA Breaking Capacity
  • RS Stock No. 219-9236
  • Mfr. Part No. A9F92104
Each
$255.89(exc. GST)
Temporarily out of stock
Schneider Electric RCBO, 40A Current Rating, 1P Poles, Type B, Acti9 Range
  • RS Stock No. 245-090
  • Mfr. Part No. A9D56840
Each
$408.12(exc. GST)
In Stock
Eaton 500A Bolted Tag Fuse, MMT, 150 V dc, 240V ac, 59mm
  • RS Stock No. 182-1470
  • Mfr. Part No. 500LMMT
Each
$986.22(exc. GST)
Temporarily out of stock
Siemens 5SM34 RCCB, 124A, 2 Pole, 100mA, Type A, 230V
  • RS Stock No. 328-427
  • Mfr. Part No. 5SM3415-6KK
Each
$961.10(exc. GST)
Temporarily out of stock
Eaton 2A Tag Fuse, 550V ac
  • RS Stock No. 229-146
  • Mfr. Part No. NSD2
1 Pack of 20
$361.06(exc. GST)
1
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