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

192 of 999+
Schneider Electric Acti9 iC40N MCB, 1P + N, 20A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 654-726
  • Mfr. Part No. A9P54620
Each
$135.13(exc. GST)
Martindale Drummond Busbar Connector, 600V ac
  • RS Stock No. 122-5529
  • Mfr. Part No. GCK/F/GKIT1
Each
$374.64(exc. GST)
Schneider Electric, PowerPact Circuit breaker 4P 150A, Breaking Capacity 100 kA, Clip-On
  • RS Stock No. 438-872
  • Mfr. Part No. NHJL36150M38X
Each
$7,333.93(exc. GST)
Mersen 20A Slow-Blow Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 247-2856
  • Mfr. Part No. P211038
1 Box of 10
$115.43(exc. GST)
ABB SMISSLINE TP S400M MCB, 3P, 25A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 177-030
  • Mfr. Part No. 2CCS573001R0254 S403M-C25
Each
$332.85(exc. GST)
Better World
Schneider Electric, Compact MCCB 4P 25A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 178-8156
  • Mfr. Part No. LV426261
Each
$1,119.13(exc. GST)
Schneider Electric, ComPacT MCCB 4P 63A, Fixed Mount
  • RS Stock No. 260-7545
  • Mfr. Part No. C11B4TM063L
Each
$1,365.75(exc. GST)
Schneider Electric, ComPacT MCCB 3P 320A, Fixed Mount
  • RS Stock No. 260-8122
  • Mfr. Part No. C40N31M320
Each
$7,139.69(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 70 kA
  • RS Stock No. 210-1674
  • Mfr. Part No. 3VA1163-6EE32-0AA0
Each
$703.45(exc. GST)
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5135
  • Mfr. Part No. 3VA2116-6HL46-0AA0
Each
$3,652.83(exc. GST)
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-4110
  • Mfr. Part No. 1SDA072218R1
Each
$15,228.75(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 268-591
  • Mfr. Part No. 3VA6110-6KL31-0AA0
Each
$4,058.86(exc. GST)
TE Connectivity Busbar
  • RS Stock No. 420-366
  • Mfr. Part No. RT170P1 1860211-1
Each
$2.41(exc. GST)
TE Connectivity Busbar
  • RS Stock No. 420-407
  • Mfr. Part No. PT170P1 1860214-1
Each
$1.38(exc. GST)
Wickmann SMD Non Resettable Fuse 10A, 125V
  • RS Stock No. 174-0298
  • Mfr. Part No. 0453010.MR
1 Reel of 1000
$2,284.61(exc. GST)
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 231-474
  • Mfr. Part No. 109682 NZMN3-S400
Each
$4,565.53(exc. GST)
RS PRO 6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8113
Each (In a Pack of 50)
$1.148(exc. GST)
Eaton 20A British Standard Fuse, A1, 550V ac, 42.5mm
  • RS Stock No. 139-883
  • Mfr. Part No. NITD20M25
Each (In a Pack of 5)
$9.876(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 80A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 209-5032
  • Mfr. Part No. 3VA1180-3EE32-0AA0
Each
$854.49(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-598
  • Mfr. Part No. 3VA5580-5EC42-0AA0
Each
$11,458.92(exc. GST)
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