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

218 of 999+
Eaton PDIM RCCB, 40A, 4 Pole, 30 → 1000mA, Type A, 230/400V ac
  • RS Stock No. 230-690
  • Mfr. Part No. 111760 PDIM-40/4
Each
$981.85(exc. GST)
Siemens 1.25kA Tag Fuse, NH3, 690V
  • RS Stock No. 608-707
  • Mfr. Part No. 3NC3243-6U
1 Pack of 3
$1,536.61(exc. GST)
Schneider Electric, ComPacT New generation MCCB 4P 25A, Breaking Capacity 440 V, Fixed Mount
  • RS Stock No. 205-307
  • Mfr. Part No. C11N44V025B
Each
$6,555.64(exc. GST)
Siemens SENTRON Connection Unit
  • RS Stock No. 277-0817
  • Mfr. Part No. 3WA9111-0AV11
Each
$79.63(exc. GST)
Schneider Electric Acti 9 3 Phase Distribution Board, 60 Way, 250 A
  • RS Stock No. 230-6843
  • Mfr. Part No. SAU25060183
Each
$794.20(exc. GST)
Sensata Airpax Airpax Thermal Circuit Breaker - 209 3 Pole 240V ac Voltage Rating Panel Mount, 30A Current Rating
  • RS Stock No. 275-0059
  • Mfr. Part No. 209-3-1-61-4-9-30-V
Each
$565.24(exc. GST)
Siemens 25A NH Fuse, NH1, 440 - 500V ac/dc
  • RS Stock No. 269-8314
  • Mfr. Part No. 3NA7110
Each (In a Pack of 3)
$33.913(exc. GST)
Bourns Thermal Fuse +82°C 50 A, 28V
  • RS Stock No. 258-6412
  • Mfr. Part No. SC82AAB
Each (In a Pack of 10)
$1.39(exc. GST)
Eaton 30A Base Mount Fuse Holder, 600V
  • RS Stock No. 261-442
  • Mfr. Part No. BK/HEB-AA
1 Pack of 20
$1,816.39(exc. GST)
Siemens SENTRON 4 Phase Busbar
  • RS Stock No. 187-5209
  • Mfr. Part No. 5ST3746-2
Each
$314.71(exc. GST)
ETA Thermal Circuit Breaker - 106 Single Pole 240V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 728-8654
  • Mfr. Part No. 106-P10-000040-10A
Each
$62.48(exc. GST)
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-232
  • Mfr. Part No. 3VA6610-6HL42-0AA0
Each
$20,652.95(exc. GST)
Mersen 10A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6805
  • Mfr. Part No. W084314
Each (In a Pack of 10)
$9.992(exc. GST)
Eaton 6A NH Fuse, 51 x 21 x 79mm, 400V ac
  • RS Stock No. 261-736
  • Mfr. Part No. 6NHG000B-400
1 Pack of 3
$29.03(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 150A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-598
  • Mfr. Part No. 3VA6115-5KM41-0AA0
Each
$7,063.71(exc. GST)
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 3P 250A, Fixed Mount
  • RS Stock No. 230-6800
  • Mfr. Part No. LV432682
Each
$2,377.01(exc. GST)
Siemens SENTRON Electronic Time Delay for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-661
  • Mfr. Part No. 3VW9011-0AE15
Each
$1,210.90(exc. GST)
Socomec FUSOMAT Trip Unit for use with SIDERMAT Fuse Disconnecting Switches
  • RS Stock No. 252-3541
  • Mfr. Part No. 39904024
Each
$927.18(exc. GST)
Schneider Electric Cover for use with INS100, INS160
  • RS Stock No. 280-8418
  • Mfr. Part No. 28958
Each
$26.80(exc. GST)
Mersen 10A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-873
  • Mfr. Part No. Q206071Q
1 Box of 10
$20.08(exc. GST)
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