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

96 of 999+
Temporarily out of stock
Siemens Auxiliary Switch
  • RS Stock No. 223-7682
  • Mfr. Part No. 5TT4932
Each
$120.95(exc. GST)
Temporarily out of stock
Schneider Electric RCBO, 10A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 230-6645
  • Mfr. Part No. A9D61810
Each
$117.83(exc. GST)
Temporarily out of stock
SENTRON Shunt Trip Voltage Release for use with 3VA41, 3VA51-59, 3VA61-69 Series
  • RS Stock No. 263-700
  • Mfr. Part No. 3VA9978-0BA24
Each
$935.62(exc. GST)
In Stock
ETA REX12 Electronic Circuit breaker 4A 24V REX12-T, DIN Rail Mount
  • RS Stock No. 175-0372
  • Mfr. Part No. REX12-TA2-107-DC24V-4A/4A
Each
$134.28(exc. GST)
Temporarily out of stock
Eaton 6A Tag Fuse, 22 x 82mm, 0.46/0.69kV
  • RS Stock No. 228-830
  • Mfr. Part No. 6H07-660
1 Pack of 20
$1,775.87(exc. GST)
Temporarily out of stock
20A NH Fuse, NH0, 500V
  • RS Stock No. 252-915
  • Mfr. Part No. 20NHG0B
1 Pack of 3
$46.51(exc. GST)
Temporarily out of stock
Schneider Electric Square D Qovs MCB, 1P, 10A, Type AC
  • RS Stock No. 230-6824
  • Mfr. Part No. QO110B10RCBO30F
Each
$1,287.52(exc. GST)
In Stock
Littelfuse SMD Non Resettable Fuse 2.5A, 125V
  • RS Stock No. 738-2860
  • Mfr. Part No. 015402.5DRT
Each (In a Pack of 10)
$5.349(exc. GST)
Temporarily out of stock
Clipsal Electrical RCBO, 10A Current Rating, 3P+N Poles, 100mA Trip Sensitivity, Type A, Acti9 Range
  • RS Stock No. 281-5923
  • Mfr. Part No. A9DC2910
Each
$679.25(exc. GST)
Temporarily out of stock
Eaton, xEnergy MCCB 1P 160A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 537-5573
  • Mfr. Part No. 259123 NZMN2-VE160
Each
$1,763.78(exc. GST)
In Stock
ifm electronic Power Supply Module for use with Electronic Circuit Breaker
  • RS Stock No. 100-574
  • Mfr. Part No. DF2101
Each
$212.93(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 Masterpact Controller for use with Compact NS100 → 630, Compact NS630b → 1600,
  • RS Stock No. 247-1725
  • Mfr. Part No. 29380
Each
$4,659.83(exc. GST)
In Stock
SIBA 1.6A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3232
  • Mfr. Part No. 70-007-33/1.6A
Each (In a Pack of 10)
$0.44(exc. GST)
In Stock
Littelfuse 1.6A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8041
  • Mfr. Part No. 021601.6MXP
Each (In a Bag of 10)
$2.143(exc. GST)
Temporarily out of stock
Miniature Circuit Breaker 4A
  • RS Stock No. 599-636
  • Mfr. Part No. 2CCS473001R0045
Each
$348.57(exc. GST)
In Stock
Siemens 6A D01 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-1045
  • Mfr. Part No. 5SE2306
Each (In a Pack of 10)
$3.517(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-503
  • Mfr. Part No. 3VA6110-5HN31-2AA0
Each
$2,377.01(exc. GST)
In Stock
Eaton 250A Tag Fuse, NH2, 1kV
  • RS Stock No. 282-6184
  • Mfr. Part No. BSF-250G-NH210
Each
$629.75(exc. GST)
Temporarily out of stock
Schneider Electric Vertical Busbar, Canalis Series
  • RS Stock No. 346-717
  • Mfr. Part No. KSA250ED33012
Each
$3,194.97(exc. GST)
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