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

111 of 999+
Temporarily out of stock
Eaton Phase Busbar 3 Phase Busbar, 277V
  • RS Stock No. 231-542
  • Mfr. Part No. 121988 BB-UL-18/3P+AS-3,5M/48
Each
$151.42(exc. GST)
Temporarily out of stock
Siemens 630A Tag Fuse, NH3, 1kV
  • RS Stock No. 608-737
  • Mfr. Part No. 3NC3336-1U
1 Pack of 3
$1,439.71(exc. GST)
In Stock
Siemens Fuse Holder Diazed Holder Chuck
  • RS Stock No. 202-7170
  • Mfr. Part No. 5SH302
Each (In a Pack of 10)
$5.763(exc. GST)
In Stock
Schurter 5A Surface Mount Fuse Block, 125V ac/dc
  • RS Stock No. 167-5194
  • Mfr. Part No. 0031.7701.11
Each (In a Pack of 10)
$2.686(exc. GST)
Temporarily out of stock
SENTRON for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-607
  • Mfr. Part No. 3VA9477-0CK12
1 Kit
$3,076.26(exc. GST)
Temporarily out of stock
Siemens ALPHA Cover Frame for use with N/PE Busbar Support
  • RS Stock No. 629-300
  • Mfr. Part No. 8GK4854-0KK10
Each
$72.02(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 2P 400A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-229
  • Mfr. Part No. 3VA5340-5EC61-0AA0
Each
$5,298.39(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 105 Single Pole 240V Voltage Rating Snap In, 3A Current Rating
  • RS Stock No. 728-8626
  • Mfr. Part No. 105-P10-3A
Each
$49.18(exc. GST)
Last RS stock
Eaton 10A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7115
  • Mfr. Part No. BK-MDL-10-R
Each
$7.34(exc. GST)
In Stock
Bulgin 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 376-6624
  • Mfr. Part No. FX0458/2
Each (In a Pack of 5)
$12.248(exc. GST)
In Stock
Wurth Elektronik PA Base Mount Fuse Holder Cover for 5 x 20mm Fuse
  • RS Stock No. 893-0596
  • Mfr. Part No. 696122003001
Each (In a Pack of 10)
$0.447(exc. GST)
In Stock
RS PRO 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-396
Each (In a Pack of 10)
$1.10(exc. GST)
Temporarily out of stock
Legrand RCBO, 16A, Type F, 240V AC
  • RS Stock No. 255-2328
  • Mfr. Part No. 410855
Each
$1,017.49(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 269-930
  • Mfr. Part No. 3VA6115-7HL31-2AA0
Each
$3,901.87(exc. GST)
Temporarily out of stock
Siemens SENTRON Trip Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-658
  • Mfr. Part No. 3VW9017-5AA00
Each
$5,673.42(exc. GST)
Temporarily out of stock
Siemens SENTRON 3VA9 Mounting Kit for use with 3VA2 100/160/250
  • RS Stock No. 218-1800
  • Mfr. Part No. 3VA9126-0SS10
Each
$109.99(exc. GST)
In Stock
SIBA 100mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3201
  • Mfr. Part No. 70-007-33/0.1A
Each (In a Pack of 10)
$0.17(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1kA, Breaking Capacity 31 kA, Fixed Mount
  • RS Stock No. 346-734
  • Mfr. Part No. C100H35EFM
Each
$29,152.73(exc. GST)
Temporarily out of stock
Eaton 63A NH Fuse, 63 x 40 x 150mm, 500V ac
  • RS Stock No. 262-552
  • Mfr. Part No. 63NHG02BI NH FUSE 63A 500V GL/GG SIZE 02
1 Pack of 3
$69.47(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 20A Curve C, 400V AC
  • RS Stock No. 239-9970
  • Mfr. Part No. A9P22320
Each
$207.37(exc. GST)
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