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

123 of 999+
Siemens 250A Centred Tag Fuse, NH2, 500V ac
  • RS Stock No. 203-2040
  • Mfr. Part No. 3NA7244
Each (In a Pack of 3)
$52.573(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 260-483
  • Mfr. Part No. 3VA6325-6HM31-2AA0
Each
$7,377.67(exc. GST)
Legrand 500mA Ceramic Cartridge Fuse, 8 x 32mm
  • RS Stock No. 266-3086
  • Mfr. Part No. 0 123 94
1 Box of 10
$151.42(exc. GST)
100A Cartridge Fuse, 26 x 111mm
  • RS Stock No. 261-939
  • Mfr. Part No. TCP100A
1 Pack of 10
$784.07(exc. GST)
Siemens SENTRON 5SY4 MCB, 4P, 50A, Type A, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-325
  • Mfr. Part No. 5SY4650-5
Each
$913.66(exc. GST)
Better World
ABB Emax2 Electronic Circuit Breaker 250A Ekip Touch LSI, 3 channels
  • RS Stock No. 259-9865
  • Mfr. Part No. 1SDA070695R1
Each
$11,211.05(exc. GST)
Schneider Electric, ComPacT NSX MCCB 3P 63A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-702
  • Mfr. Part No. IL0633P36
Each
$1,250.32(exc. GST)
Bulgin 13A Panel Mount Fuse Holder for 6.3 x 25mm Fuse, 1P, 250V ac
  • RS Stock No. 414-099
  • Mfr. Part No. FX0416/S
Each
$22.42(exc. GST)
Siemens SENTRON Sliding Contacts for use with 3VA20/21/22
  • RS Stock No. 275-983
  • Mfr. Part No. 3VA9168-0VF30
Each
$446.27(exc. GST)
Better World
Schneider Electric Horizontal Distribution Busbar Trunking, 3m, 630A, Canalis KS Series
  • RS Stock No. 211-0482
  • Mfr. Part No. KSA630ED4306
Each
$3,082.75(exc. GST)
Eaton 50A Cartridge Fuse, 76 x 292mm
  • RS Stock No. 228-963
  • Mfr. Part No. 12FFLSJ50
1 Pack of 3
$3,960.31(exc. GST)
Hager NRN MCB, 3P, 40A Curve C, 415V AC, 20 kA Breaking Capacity
  • RS Stock No. 597-948
  • Mfr. Part No. NRN340
Each
$555.28(exc. GST)
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-250
  • Mfr. Part No. 3VA6440-8HM41-2AA0
Each
$15,338.39(exc. GST)
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA IZMX/INX Circuit-Breaker, 4 channels , Withdrawable
  • RS Stock No. 127-560
  • Mfr. Part No. 183568 IZMX16N4-V16W-1
Each
$25,505.54(exc. GST)
SENTRON Auxiliary Switch Kit for use with 3VA57/58/59, 3VA67/68/69 Series
  • RS Stock No. 263-744
  • Mfr. Part No. 3VA9877-0GX42
1 Kit
$330.84(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 150A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 268-551
  • Mfr. Part No. 3VA6115-6KM41-0AA0
Each
$7,579.47(exc. GST)
Siemens, SENTRON MCCB 4P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-394
  • Mfr. Part No. 3VA6560-5KL46-0AA0
Each
$14,508.65(exc. GST)
Siemens SENTRON Locking Device for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-625
  • Mfr. Part No. 3VW9011-0BA42
Each
$284.78(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 90A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 269-693
  • Mfr. Part No. 3VA5290-7GC41-0AA0
Each
$3,184.27(exc. GST)
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-510
  • Mfr. Part No. Mi 1449
Each
$1,533.87(exc. GST)
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