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

130 of 999+
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-3136
  • Mfr. Part No. 1SDA070990R1
Each
$20,889.42(exc. GST)
Currently unavailable
RS PRO 45A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3660
Each (In a Pack of 5)
$30.648(exc. GST)
In Stock
ABB Earth & Neutral Terminal Bar for use with MCB
  • RS Stock No. 232-0026
  • Mfr. Part No. GJI2320131R0001 SZ-KLB 8
1 Box of 1
$19.72(exc. GST)
Temporarily out of stock
Rittal SZ Busbar
  • RS Stock No. 230-4854
  • Mfr. Part No. 2364000
Each
$292.60(exc. GST)
In Stock
Mersen 2A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-842
  • Mfr. Part No. Z085375Q
1 Box of 10
$32.98(exc. GST)
In Stock
Better World
Schneider Electric Zelio Relay Busbar
  • RS Stock No. 179-9446
  • Mfr. Part No. RSLZ2
Each
$3.15(exc. GST)
Temporarily out of stock
Eaton IZMX Electronic Circuit Breaker 3.2kA , 4 channels , Withdrawable
  • RS Stock No. 132-887
  • Mfr. Part No. 183756 IZMX40N4-V32W-1
Each
$58,127.94(exc. GST)
In Stock
Schurter 5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4243
  • Mfr. Part No. 8020.5018.G
Each (In a Pack of 10)
$1.517(exc. GST)
In Stock
Hager CDA RCD Switch, 40A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 251-2024
  • Mfr. Part No. CDA743F
Each
$305.88(exc. GST)
Temporarily out of stock
Clipsal Electrical RCBO, 16A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type A, MAX9 Range
  • RS Stock No. 282-2983
  • Mfr. Part No. MX9R3216
Each
$64.11(exc. GST)
Temporarily out of stock
Siemens SENTRON Signaling Switch for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-643
  • Mfr. Part No. 3VW9011-0AT11
Each
$191.27(exc. GST)
In Stock
Littelfuse 20A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 754-6294
  • Mfr. Part No. 0SPF020
Each
$25.33(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 655-280
  • Mfr. Part No. C100N450FM
Each
$12,944.59(exc. GST)
Temporarily out of stock
Wickmann 40A Bolt Down Car Fuse, 32V dc
  • RS Stock No. 174-0216
  • Mfr. Part No. 0298040.ZXB
Each (In a Box of 280)
$12.904(exc. GST)
In Stock
Eaton 8A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-0972
  • Mfr. Part No. S500-8-R
Each (In a Pack of 10)
$0.59(exc. GST)
Temporarily out of stock
Siemens SENTRON Undervoltage Release for use with 3VA4/5/6
  • RS Stock No. 157-829
  • Mfr. Part No. 3VA9978-0BB25
Each
$1,179.26(exc. GST)
New product - Preorder today
Schneider Electric R9R RCCB, 40A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 654-662
  • Mfr. Part No. R9R22240
Each
$236.68(exc. GST)
Temporarily out of stock
Schneider Electric ComPact Auxiliary Contact for use with NS630b to NS3200
  • RS Stock No. 275-6649
  • Mfr. Part No. 33004
Each
$150.25(exc. GST)
Temporarily out of stock
Eaton 5A Cartridge Fuse, 142 x 25.4mm
  • RS Stock No. 228-639
  • Mfr. Part No. 5.5ABWNA5E
Each
$364.96(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 3130 2 Pole 240V Voltage Rating Snap In, 15A Current Rating
  • RS Stock No. 212-2001
  • Mfr. Part No. 3130-F120-P7T1-W02Q-15A
Each
$139.54(exc. GST)
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