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

114 of 999+
In Stock
Littelfuse 150A Orange Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4394
  • Mfr. Part No. 0298150.ZXEH
Each
$12.80(exc. GST)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with 3VA2 Molded Case Circuit Breakers
  • RS Stock No. 629-328
  • Mfr. Part No. 8GK4736-4KK12
Each
$386.19(exc. GST)
Temporarily out of stock
Schneider Electric Altivar Process Modular Busbar Kit
  • RS Stock No. 119-414
  • Mfr. Part No. VW3A99ACFCB
Each
$1,211.14(exc. GST)
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 10A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-656
  • Mfr. Part No. 3RV2411-1JA20-0DA0
Each
$355.49(exc. GST)
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 6.3A, 250V ac
  • RS Stock No. 169-9505
  • Mfr. Part No. SR-5-6-3A-BK
Each (In a Bag of 200)
$1.308(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 2A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9554
  • Mfr. Part No. 2CDS253001R0021 S203-D2
Each
$198.23(exc. GST)
Last RS stock
RS PRO 25A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 182-4048P
Each (Supplied in a Box)
$14.77(exc. GST)
In Stock
Mersen 6.3A Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-888
  • Mfr. Part No. V090523Q
1 Box of 10
$12.19(exc. GST)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 315mA, 250V
  • RS Stock No. 767-5175
Each (In a Pack of 10)
$0.939(exc. GST)
Temporarily out of stock
Eaton 5A Cartridge Fuse
  • RS Stock No. 228-695
  • Mfr. Part No. FNQ-5
1 Pack of 10
$1,031.33(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 iID RCCB, 100A, 2 Pole, 300mA, Type AC, 220 → 240V ac
  • RS Stock No. 654-824
  • Mfr. Part No. SEA9R14291
Each
$838.09(exc. GST)
In Stock
Eaton 63A DIII Bottle Fuse, E33 Thread Size, gG, 500V ac
  • RS Stock No. 181-8720
  • Mfr. Part No. 63D33
Each
$68.51(exc. GST)
In Stock
Eaton 50A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 703-8469
  • Mfr. Part No. C22G50
Each (In a Pack of 10)
$9.517(exc. GST)
Temporarily out of stock
SENTRON Plug In Unit for use with 3VA63/64 Series
  • RS Stock No. 263-940
  • Mfr. Part No. 3VA9344-0KP10
1 Kit
$2,873.71(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, 40kA, 1000V dc, Wall Mount Mount
  • RS Stock No. 497-806
  • Mfr. Part No. 1318524
Each
$2,446.47(exc. GST)
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - LELB1 Single Pole Panel Mount, 100A Current Rating
  • RS Stock No. 275-0359
  • Mfr. Part No. LELB1-1-51-100.-1-01-V
Each
$231.15(exc. GST)
Temporarily out of stock
Littelfuse Non-Resettable Surface Mount Fuse 40A, 60V ac
  • RS Stock No. 229-1417
  • Mfr. Part No. 0456040.DRSDE
Each (On a Reel of 1500)
$5.201(exc. GST)
In Stock
Eaton 63A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 181-8787
  • Mfr. Part No. 63NZ02
Each
$11.32(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 160A, Fixed Mount
  • RS Stock No. 254-6333
  • Mfr. Part No. C12N3TM160L
Each
$2,497.55(exc. GST)
In Stock
Littelfuse 12A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 876-8353
  • Mfr. Part No. KLKD012.T
Each
$59.13(exc. GST)
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