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

260 of 999+
In Stock
Siemens Connection Plug for use with S0 Size Circuit Breakers with Spring Terminal
  • RS Stock No. 124-3109
  • Mfr. Part No. 3RV2927-5AA00
Each
$7.77(exc. GST)
Temporarily out of stock
Eaton 355A Tag Fuse, 3L, 1.5kV
  • RS Stock No. 282-6213
  • Mfr. Part No. PV-355A-3L-15
Each
$1,119.78(exc. GST)
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA10/11
  • RS Stock No. 153-377
  • Mfr. Part No. 3VA9113-0JJ12
Each
$248.64(exc. GST)
In Stock
WAGO Electronic Circuit Breaker 4A 24V 787, 1 channels , DIN Rail
  • RS Stock No. 303-325
  • Mfr. Part No. 787-3861/400-000
Each
$83.08(exc. GST)
Temporarily out of stock
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA, Cable Mount
  • RS Stock No. 249-184
  • Mfr. Part No. 3VA6610-7JT46-0AA0
Each
$30,945.78(exc. GST)
Temporarily out of stock
Siemens Fuse Holder Diazed Adapter Screw
  • RS Stock No. 202-7077
  • Mfr. Part No. 5SH312
Each (In a Pack of 25)
$2.444(exc. GST)
Last RS stock
Eaton EVG 3 Phase Busbar, 415V
  • RS Stock No. 144-282
  • Mfr. Part No. 78623728 EVG-16/3PHAS/6MODUL+ZV-BS-G+FAZ-XK25
Each
$30.63(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.25kA , DIN Rail
  • RS Stock No. 127-482
  • Mfr. Part No. 183344 IZMX16B3-V12W-1
Each
$12,621.03(exc. GST)
Temporarily out of stock
Eaton 30A 0.001 x 0.001in Open Fuse Fuse Block, 480V
  • RS Stock No. 229-097
  • Mfr. Part No. BG3031S
1 Pack of 10
$282.60(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 40A, Fixed Mount
  • RS Stock No. 260-7526
  • Mfr. Part No. C11B3TM040B
Each
$994.59(exc. GST)
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 200mA, 250V ac
  • RS Stock No. 226-0535P
  • Mfr. Part No. 3700200000
Each (Supplied as a Tape)
$1.585(exc. GST)
Temporarily out of stock
Siemens SENTRON 3 Phase Busbar Connector, 400V
  • RS Stock No. 152-512
  • Mfr. Part No. 5ST3725-4
Each
$51.71(exc. GST)
Temporarily out of stock
Siemens SENTRON Door Feedthrough Accessory for use with 3VA20/21/22
  • RS Stock No. 162-013
  • Mfr. Part No. 3VA9167-0KT00
Each
$244.52(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 Acti9 Reflex MCB, 4P, 25A Curve B, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 354-359
  • Mfr. Part No. A9C61425
Each
$1,048.51(exc. GST)
Temporarily out of stock
Miniature circuit breaker, 16 A, 1p
  • RS Stock No. 611-255
  • Mfr. Part No. PLSM-B16-Q-MW
Each
$45.06(exc. GST)
In Stock
RS PRO 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8098
Each (In a Pack of 5)
$5.318(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 2P, 40A Curve D, 400V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 610-388
  • Mfr. Part No. 5SY7240-8
Each
$438.37(exc. GST)
In Stock
Better World
Schneider Electric Busbar Trunking Blanking Plate, Canalis KBC Series
  • RS Stock No. 219-8883
  • Mfr. Part No. KBC16ZB1
Each (In a Pack of 10)
$17.63(exc. GST)
In Stock
Littelfuse 20A Base Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 300V ac
  • RS Stock No. 787-4316P
  • Mfr. Part No. 03540821ZXBL
Each (Supplied in a Bag)
$2.498(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 4P, 25A Curve D, 400V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 610-440
  • Mfr. Part No. 5SY7425-8
Each
$634.49(exc. GST)
1
260
1758
Results per page

Related links