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

267 of 999+
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-611
  • Mfr. Part No. 3VA5140-4EC31-0AA0
Each
$1,123.36(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 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)
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
RS PRO 16A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-063
1 Pack of 10
$594.00(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
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9672
  • Mfr. Part No. 3VA11105FE420AA0
Each
$1,456.21(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-029
  • Mfr. Part No. 3VA6560-7JP46-2AA0
Each
$16,459.59(exc. GST)
In Stock
Schurter 30A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2657P
  • Mfr. Part No. 8020.0607.PT
Each (Supplied in a Bag)
$2.157(exc. GST)
Temporarily out of stock
Eaton 4A FF Ceramic Cartridge Fuse, 50 x 13.2mm
  • RS Stock No. 228-884
  • Mfr. Part No. 4D16Q
1 Pack of 10
$59.08(exc. GST)
In Stock
Phoenix Contact 16A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS Stock No. 197-5970
  • Mfr. Part No. 2903126
Each
$32.93(exc. GST)
Temporarily out of stock
Schneider Electric, Acti9 MCCB 4P 250A, Panel Mount
  • RS Stock No. 654-763
  • Mfr. Part No. SEA9PQCB2504
Each
$2,620.57(exc. GST)
1
267
1758
Results per page

Related links