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

209 of 999+
Siemens 10A Tag Fuse, NH000, 400V ac
  • RS Stock No. 144-099
  • Mfr. Part No. 3NA6803-4
1 Pack of 3
$39.44(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3943
  • Mfr. Part No. 3VA2110-0MQ36-0AA0
Each
$4,314.72(exc. GST)
onsemi Thermal Fuse +125°C 3 A, 5V
  • RS Stock No. 195-8755P
  • Mfr. Part No. NIS6350MT2TXG
Each (Supplied on a Reel)
$2.223(exc. GST)
RS PRO SMD Non-Resettable Surface Mount Fuse 2A, 63V
  • RS Stock No. 252-2171
Each (In a Pack of 50)
$0.455(exc. GST)
Littelfuse 3A Resettable Fuse, 16V
  • RS Stock No. 517-6900
  • Mfr. Part No. RGEF300
Each (In a Pack of 5)
$0.972(exc. GST)
Schneider Electric, PowerPact Circuit breaker 3P 80A, Breaking Capacity 35 kA, DIN Rail Mount
  • RS Stock No. 357-940
  • Mfr. Part No. BGL36080LU
Each
$2,373.31(exc. GST)
Siemens SENTRON 5SP37 MCB, 1P, 20A, Type E, 230V AC, 25 kA Breaking Capacity
  • RS Stock No. 328-448
  • Mfr. Part No. 5SP3720-2
1 Set
$822.82(exc. GST)
RS PRO SMD Non-Resettable Surface Mount Fuse 1A, 63V
  • RS Stock No. 252-2193
Each (On a Tape of 4000)
$0.28(exc. GST)
Siemens ALPHA Assembly Kit for use with Devices With Central Direct Operating Mechanism
  • RS Stock No. 629-287
  • Mfr. Part No. 8GK4723-2KK10
Each
$304.78(exc. GST)
Schurter 1.25A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7881
  • Mfr. Part No. 0001.1005
Each (In a Pack of 10)
$1.651(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA2, 3 channels
  • RS Stock No. 156-834
  • Mfr. Part No. 3VA2340-0HM32-0AA0
Each
$7,676.68(exc. GST)
Siemens SENTRON Connection Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-571
  • Mfr. Part No. 3VW9011-0AN74
Each
$2,094.48(exc. GST)
Eaton 4A Cartridge Fuses, 22.2 x 58mm
  • RS Stock No. 228-844
  • Mfr. Part No. C22G4S
1 Pack of 10
$224.37(exc. GST)
Siemens, SENTRON MCCB 4P 300A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 256-555
  • Mfr. Part No. 3VA5330-5GF41-2AA0
Each
$8,222.94(exc. GST)
Eaton 25A Cartridge Fuse, 51 x 292mm
  • RS Stock No. 229-171
  • Mfr. Part No. 12FDLSJ25
1 Pack of 3
$2,102.18(exc. GST)
Schneider Electric PrismaSeT Busbar
  • RS Stock No. 130-809
  • Mfr. Part No. LVS04481
Each
$4,421.43(exc. GST)
Littelfuse SMD Non Resettable Fuse 3.15A, 125V
  • RS Stock No. 738-2902P
  • Mfr. Part No. 04513.15MRL
Each (Supplied on a Reel)
$1.72(exc. GST)
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-9503
  • Mfr. Part No. C10N42D100
Each
$3,950.10(exc. GST)
Siemens Circuit Trip
  • RS Stock No. 223-7624
  • Mfr. Part No. 5TT4411-5
Each
$148.42(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 60A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-759
  • Mfr. Part No. 3VA5260-6ED41-2AA0
Each
$2,915.19(exc. GST)
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