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

311 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 70 kA
  • RS Stock No. 209-6820
  • Mfr. Part No. 3VA1140-6EE32-0AA0
Each
$631.84(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 1kA, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5245
  • Mfr. Part No. 3VA2510-5HL32-0AA0
Each
$8,255.58(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3548
  • Mfr. Part No. 3VA2010-5KQ42-0AA0
Each
$5,292.17(exc. GST)
Temporarily out of stock
LV HRC fuse link 3NA COM with metering f
  • RS Stock No. 269-7031
  • Mfr. Part No. 3NA3240-4KK03
Each
$1,353.30(exc. GST)
In Stock
Better World
Schneider Electric, ComPact MCCB, Fixed Mount
  • RS Stock No. 221-0936
  • Mfr. Part No. LV429383
Each
$606.10(exc. GST)
In Stock
Hager 12A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 250-8605
  • Mfr. Part No. LF312M
Each (In a Pack of 10)
$6.873(exc. GST)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 200A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 231-332
  • Mfr. Part No. 113020 NZMH2-4-AF200-BT-NA
Each
$6,197.24(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4288
  • Mfr. Part No. 3VA1140-3EE36-0AA0
Each
$829.09(exc. GST)
Temporarily out of stock
Wickmann 1A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0665
  • Mfr. Part No. 35611000029
Each (In a Pack of 5)
$2.968(exc. GST)
In Stock
Schneider Electric Multifix Cover for use with Circuit Breaker
  • RS Stock No. 275-8813
  • Mfr. Part No. LVS03220
1 Box of 5
$180.47(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-8056
  • Mfr. Part No. C25W45E160
Each
$14,111.65(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-4675
  • Mfr. Part No. 1SDA072950R1
Each
$25,163.94(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100/160/250 Circuit Breakers
  • RS Stock No. 260-9368
  • Mfr. Part No. C1042D100
Each
$1,736.39(exc. GST)
In Stock
ABB 10A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9946
  • Mfr. Part No. OFAF000H10 1SCA022627R0580
Each
$11.68(exc. GST)
Temporarily out of stock
RS PRO 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8046
Each (In a Box of 500)
$1.668(exc. GST)
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 1A Current Rating
  • RS Stock No. 217-6378
  • Mfr. Part No. 2800891
Each
$192.27(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Mounting Kit for use with Acti 9, Acti 9 Smartlink
  • RS Stock No. 125-1387
  • Mfr. Part No. A9XMFA04
Each
$44.39(exc. GST)
Temporarily out of stock
Siemens 6A Cartridge Fuse, 8 x 32mm
  • RS Stock No. 232-2052
  • Mfr. Part No. 3NW6301-1
Each (In a Pack of 10)
$10.732(exc. GST)
In Stock
Eaton 10A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8620
  • Mfr. Part No. 10NHG000B
Each
$10.53(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 25A, Fixed Mount
  • RS Stock No. 260-9450
  • Mfr. Part No. C10H32M025
Each
$2,402.64(exc. GST)
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