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

233 of 999+
Temporarily out of stock
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 252-244
  • Mfr. Part No. 192354 NZMN3-PX250
Each
$5,942.94(exc. GST)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - PR21 2 Pole Panel Mount, 5A Current Rating
  • RS Stock No. 275-0446
  • Mfr. Part No. PR21-62-5.00A-XX-V
1 Box of 5
$338.84(exc. GST)
In Stock
Siemens 3RV1935 Busbar for use with Circuit Breaker 3RV2
  • RS Stock No. 272-0032
  • Mfr. Part No. 3RV19353C
Each
$196.30(exc. GST)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IULK1 Single Pole Panel Mount, 15A Current Rating
  • RS Stock No. 275-0312
  • Mfr. Part No. IULK1-1-66-15.0-01
Each
$133.19(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 25A 3VA2, 4 channels
  • RS Stock No. 157-393
  • Mfr. Part No. 3VA2125-8HL42-0AA0
Each
$2,912.06(exc. GST)
Temporarily out of stock
Eaton 400A Tag Fuse, 190 x 225mm, 690V
  • RS Stock No. 261-339
  • Mfr. Part No. EBH213TTV1
Each
$818.19(exc. GST)
In Stock
Eaton 20A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8434P
  • Mfr. Part No. C14G20
Each (Supplied in a Box)
$4.767(exc. GST)
Temporarily out of stock
Siemens 200A Tag Fuse, 97.5mm, 700V
  • RS Stock No. 608-694
  • Mfr. Part No. 3NB1726-0KK13
1 Pack of 3
$548.89(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 2P, 40A, Type A, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-312
  • Mfr. Part No. 5SY4240-5
Each
$396.85(exc. GST)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - LELHK11 2 Pole Panel Mount, 30A Current Rating
  • RS Stock No. 275-0380
  • Mfr. Part No. LELHK11-1-62-30.0-U-91-V
1 Box of 5
$1,878.80(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-407
  • Mfr. Part No. 3VA5325-5EC41-0AA0
Each
$6,390.86(exc. GST)
Temporarily out of stock
Schneider Electric, Compact MCCB 4P 800A, Breaking Capacity 100 kA
  • RS Stock No. 354-476
  • Mfr. Part No. C080L4WM
Each
$10,666.49(exc. GST)
Temporarily out of stock
Eaton Plate for use with N4-4, NZM4-4
  • RS Stock No. 257-959
  • Mfr. Part No. 284474 NZM4-4-XKM2S-1600
Each
$447.37(exc. GST)
In Stock
Siemens Fuse Holder Diazed Cover Rings
  • RS Stock No. 202-7237
  • Mfr. Part No. 5SH3411
Each (In a Pack of 5)
$4.71(exc. GST)
Temporarily out of stock
Siemens 160A Tag Fuse, 79mm, 700V
  • RS Stock No. 608-779
  • Mfr. Part No. 3NB1725-0KK10
1 Pack of 3
$546.12(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 300mA Curve C, 400V AC, 70 kA Breaking Capacity
  • RS Stock No. 610-681
  • Mfr. Part No. 5SY8614-7
Each
$560.66(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-311
  • Mfr. Part No. 3VA6440-7HM31-2AA0
Each
$19,063.66(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 125A, Fixed Mount
  • RS Stock No. 260-8047
  • Mfr. Part No. C25W3TM125
Each
$5,569.85(exc. GST)
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 100A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 341-436
  • Mfr. Part No. NHJF36100U53XTW
Each
$9,120.80(exc. GST)
Temporarily out of stock
Schneider Electric, PowerPact Circuit breaker 2P 15A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 336-583
  • Mfr. Part No. BDL26015LU
Each
$664.99(exc. GST)
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