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

85 of 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-3415
  • Mfr. Part No. 1SDA071349R1
Each
$19,322.81(exc. GST)
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 225A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 428-705
  • Mfr. Part No. NJJF36225TW
Each
$9,181.99(exc. GST)
In Stock
Omron Busbar
  • RS Stock No. 111-3530
  • Mfr. Part No. PYDN-7.75-200Y
Each
$27.98(exc. GST)
In Stock
ABB 36 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1903
  • Mfr. Part No. 1SL1206A00 65P12X32
Each
$251.60(exc. GST)
In Stock
Siemens 1 Phase Surge Protector, 25kA, DIN Rail Mount
  • RS Stock No. 211-0191
  • Mfr. Part No. 5SD7463-0
Each
$610.43(exc. GST)
Temporarily out of stock
Eaton 10A Tag Fuse, 22 x 82mm, 0.46/0.69kV
  • RS Stock No. 229-064
  • Mfr. Part No. 10H07-660
1 Pack of 20
$1,890.38(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY5 MCB, 4P, 20A Curve B, 400V AC, 880V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-374
  • Mfr. Part No. 5SY5420-6
Each
$620.64(exc. GST)
In Stock
RS PRO 15A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V
  • RS Stock No. 237-5266
Each
$9.06(exc. GST)
Temporarily out of stock
Hager Hager NKN Circuit Breaker, 2P, 50A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-912
  • Mfr. Part No. NKN250
Each
$420.02(exc. GST)
In Stock
RS PRO 10A Red Blade Car Fuse, 32V dc
  • RS Stock No. 563-744
Each (In a Pack of 10)
$1.874(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 260-197
  • Mfr. Part No. 3VA6340-5JP31-0AA0
Each
$8,164.49(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-423
  • Mfr. Part No. 3VA6440-6JT41-0AA0
Each
$18,919.21(exc. GST)
In Stock
RS PRO 4A Cartridge Fuse, 13 x 29mm
  • RS Stock No. 413-793
Each (In a Pack of 10)
$3.871(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Busbar Centre Feed Unit, Canalis KS Series
  • RS Stock No. 211-0460
  • Mfr. Part No. KSA400ABT4
Each
$4,347.20(exc. GST)
In Stock
ABB XT1, XT3 Removable Lock for use with Tmax XT
  • RS Stock No. 831-9204
  • Mfr. Part No. 1SDA066588R1
Each
$59.46(exc. GST)
In Stock
Schneider Electric, ComPacT NSX Circuit breaker 1P 100A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-232
  • Mfr. Part No. IL1001P251
Each
$442.90(exc. GST)
Temporarily out of stock
30A Fuse Holder, 2P, 48V dc
  • RS Stock No. 262-941
  • Mfr. Part No. CHCC2DIU
1 Pack of 6
$291.93(exc. GST)
Temporarily out of stock
Schneider Electric Busbar Trunking Jointing Device, KTA Series
  • RS Stock No. 339-798
  • Mfr. Part No. KTA2000ED4403
Each
$7,968.98(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 4 channels Type N
  • RS Stock No. 157-374
  • Mfr. Part No. 3VA2225-8HL42-0AA0
Each
$6,366.01(exc. GST)
In Stock
Mersen 10A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0523
  • Mfr. Part No. HP10M10
Each (In a Box of 10)
$25.103(exc. GST)
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