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

224 of 999+
Temporarily out of stock
Eaton Circuit Breaker - NZM..-ME..NA 3 Pole 690V ac Voltage Rating, 140A Current Rating
  • RS Stock No. 250-9704
  • Mfr. Part No. 118965 NZMN2-ME140-NA
Each
$4,043.26(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller NZM Undervoltage Release for use with PXR20(25) NZM2(-4), PXR20(25) NZM3(-4)
  • RS Stock No. 242-980
  • Mfr. Part No. 189733 NZM2/3-XUHIV2A24DC
Each
$566.58(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Touch LSI, 4 channels
  • RS Stock No. 259-4698
  • Mfr. Part No. 1SDA072975R1
Each
$18,108.78(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3754
  • Mfr. Part No. 1SDA071739R1
Each
$39,065.40(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3836
  • Mfr. Part No. 1SDA071849R1
Each
$66,236.49(exc. GST)
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3174
  • Mfr. Part No. 1SDA071038R1
Each
$23,900.11(exc. GST)
In Stock
Siemens ALPHA Busbar
  • RS Stock No. 226-0833
  • Mfr. Part No. 8GK9733-0KK30
Each
$167.78(exc. GST)
Temporarily out of stock
Schneider Electric PowerPact Thermal Magnetic Circuit Breaker - PowerPacT 4 Pole 525V Voltage Rating Clip-On, 80A
  • RS Stock No. 357-468
  • Mfr. Part No. BGF46080
Each
$2,893.06(exc. GST)
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-3194
  • Mfr. Part No. 1SDA071059R1
Each
$28,100.36(exc. GST)
Temporarily out of stock
Siemens SENTRON Control Wire Tap for use with 3VA12, 3VA20/21/22
  • RS Stock No. 161-292
  • Mfr. Part No. 3VA9280-0WC00
Each (In a Pack of 10)
$44.425(exc. GST)
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3288
  • Mfr. Part No. 1SDA071198R1
Each
$43,860.37(exc. GST)
Temporarily out of stock
Clipsal Electrical MAX9 MX9MC MCB, 3P, 40A, 415V AC, 6000 A Breaking Capacity
  • RS Stock No. 282-2955
  • Mfr. Part No. MX9MC340
Each
$67.11(exc. GST)
Temporarily out of stock
Hager Hager NQN Circuit Breaker, 2P, 25A Curve B, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-809
  • Mfr. Part No. NQN225
Each
$371.64(exc. GST)
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 225A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 346-695
  • Mfr. Part No. NJJL36225
Each
$10,100.13(exc. GST)
Temporarily out of stock
Eaton 40A Cartridge Fuse, 1.5 x 0.58in
  • RS Stock No. 261-689
  • Mfr. Part No. TPA-40
1 Pack of 10
$689.99(exc. GST)
In Stock
Better World
Siemens Surge Protector, Clip-On Mount
  • RS Stock No. 203-2629
  • Mfr. Part No. 3RT2926-1MR00
Each
$92.17(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 630A , Fixed
  • RS Stock No. 127-703
  • Mfr. Part No. 183336 IZMX16H3-V06F-1
Each
$10,485.96(exc. GST)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with Modular Installation Devices
  • RS Stock No. 269-8398
  • Mfr. Part No. 8GK4001-5KK11
Each
$485.03(exc. GST)
In Stock
Socomec 1, 3 Phase Surge Arrester, 1.5kV, DIN Rail Mount
  • RS Stock No. 252-3597
  • Mfr. Part No. 49830199
Each
$205.61(exc. GST)
In Stock
Better World
Schneider Electric NSX Motor Mechanism for use with ComPact NSX250
  • RS Stock No. 213-1346
  • Mfr. Part No. LV431546
Each
$2,167.71(exc. GST)
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