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

214 of 999+
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with ALPHA DIN Installation Distributor
  • RS Stock No. 272-0347
  • Mfr. Part No. 8GK4452-2KK12
Each
$280.89(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-713
  • Mfr. Part No. 3VA5560-5EC32-0AA0
Each
$6,637.66(exc. GST)
In Stock
Socomec SIRCO Phase Barrier for use with SIDERMAT Fuse Disconnecting Switches
  • RS Stock No. 252-3483
  • Mfr. Part No. 29980004
Each
$160.29(exc. GST)
Temporarily out of stock
Siemens SENTRON Retrofit Kit
  • RS Stock No. 277-0938
  • Mfr. Part No. 3WA9111-0EK61
1 Set
$1,167.80(exc. GST)
Temporarily out of stock
Siemens SENTRON Cover
  • RS Stock No. 277-0804
  • Mfr. Part No. 3WA9111-0AS10
Each
$293.67(exc. GST)
Temporarily out of stock
Schneider Electric Flexible Busbar Trunking, 5m, 630A, Canalis Series
  • RS Stock No. 207-234
  • Mfr. Part No. KSA630ET450
Each
$6,793.86(exc. GST)
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2328
  • Mfr. Part No. 2CCF800240R0001
Each
$28.34(exc. GST)
Unavailable
Schneider Electric 440 → 550V ac Electronic Earth Leakage Circuit Trip for use with Compact NSX 250 Circuit
  • RS Stock No. 219-9381
  • Mfr. Part No. LV431533
Each
$7,126.88(exc. GST)
Temporarily out of stock
Siemens SENTRON 3 Phase Busbar, 230V, 17.6mm Pitch
  • RS Stock No. 187-5227
  • Mfr. Part No. 5ST3773-0
Each
$638.02(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-7930
  • Mfr. Part No. C25L4
Each
$6,948.07(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, Masterpact MCCB 3P 4kA, Fixed Mount
  • RS Stock No. 248-3816
  • Mfr. Part No. LV848323
Each
$97,251.55(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9436
  • Mfr. Part No. 3VA1180-6GE42-0AA0
Each
$1,343.55(exc. GST)
Temporarily out of stock
U-shaped busbar Cu 10 mm
  • RS Stock No. 279-4289
  • Mfr. Part No. 790-190
1 Box of 5
$89.50(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9681
  • Mfr. Part No. 3VA11106FD420AA0
Each
$1,384.96(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-7620
  • Mfr. Part No. C11H3TM050B
Each
$1,679.83(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 110 kA, DIN Rail Mount
  • RS Stock No. 271-9490
  • Mfr. Part No. 3VA1325-7MH32-0AA0
Each
$4,130.37(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7753
  • Mfr. Part No. C16F34V100
Each
$5,782.82(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9477
  • Mfr. Part No. 3VA1216-4FF42-0AA0
Each
$3,182.92(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-7982
  • Mfr. Part No. C25R45E250
Each
$10,740.39(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9874
  • Mfr. Part No. 3VA1125-6GF42-0AA0
Each
$1,399.49(exc. GST)
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