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

248 of 999+
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 25A, Breaking Capacity 65 kA, Screw Mount
  • RS Stock No. 207-252
  • Mfr. Part No. BGL36025LU
Each
$3,725.92(exc. GST)
Temporarily out of stock
Siemens SIRIUS Wiring Module
  • RS Stock No. 157-781
  • Mfr. Part No. 3RA2933-3FA00
Each
$57.49(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 50A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-669
  • Mfr. Part No. 3VA5150-4ED11-0AA0
Each
$606.90(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-327
  • Mfr. Part No. 3VA6460-8HM31-0AA0
Each
$10,696.49(exc. GST)
Limited stock
SIBA 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 314-4822
  • Mfr. Part No. 50-179-06/20A
Each (In a Pack of 5)
$25.466(exc. GST)
In Stock
Hager RCBO, 32A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type A
  • RS Stock No. 602-211
  • Mfr. Part No. ADX482C
Each
$1,216.60(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 4P 50A, Fixed Mount
  • RS Stock No. 254-6324
  • Mfr. Part No. C11N4TM050L
Each
$1,995.95(exc. GST)
Temporarily out of stock
Siemens SENTRON Conversion Kit
  • RS Stock No. 277-0921
  • Mfr. Part No. 3WA9111-0EK12
1 Set
$452.39(exc. GST)
Temporarily out of stock
Schurter SMD Non Resettable Fuse 500mA, 125V ac/dc
  • RS Stock No. 173-7991
  • Mfr. Part No. 3404.0112.22
Each (On a Reel of 750)
$0.979(exc. GST)
In Stock
Bourns Surface Mount Fuse 1A, 50 V dc, 63 V dc
  • RS Stock No. 245-9197P
  • Mfr. Part No. SF-0603SPA100R-2
Each (Supplied on a Reel)
$2.07(exc. GST)
Temporarily out of stock
SENTRON for use with 3VA6 Series
  • RS Stock No. 263-858
  • Mfr. Part No. 3VA9977-0MB10
Each
$10,894.31(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 4 channels
  • RS Stock No. 156-648
  • Mfr. Part No. 3VA2216-5JQ42-0AA0
Each
$6,888.75(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 700A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 256-475
  • Mfr. Part No. 3VA5570-5EC32-0AA0
Each
$7,938.26(exc. GST)
Temporarily out of stock
Eaton 3.15A Cartridge Fuse, 142 x 25.4mm
  • RS Stock No. 228-831
  • Mfr. Part No. 7.2ABWNA3.15 7.2KV 3.15A 'BWNA' FUSE
Each
$404.99(exc. GST)
Temporarily out of stock
Hager Hager NQN Circuit Breaker, 4P, 20A Curve B, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-818
  • Mfr. Part No. NQN420
Each
$734.02(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 4 channels
  • RS Stock No. 156-739
  • Mfr. Part No. 3VA2340-5JP42-0AA0
Each
$8,126.91(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-289
  • Mfr. Part No. 3VA5340-5EC41-2AA0
Each
$7,798.24(exc. GST)
Temporarily out of stock
Siemens ALPHA Base for use with ALPHA 630 DIN
  • RS Stock No. 629-039
  • Mfr. Part No. 8GK9900-0KK13
Each
$431.45(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3729
  • Mfr. Part No. 3VA2040-5JP32-0AA0
Each
$3,228.71(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-367
  • Mfr. Part No. 3VA6225-7JQ41-2AA0
Each
$18,340.45(exc. GST)
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