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

220 of 999+
Eaton 400A T Cartridge Fuse, 51 x 182mm
  • RS Stock No. 182-1354
  • Mfr. Part No. LPJ-400SP
Each
$1,386.06(exc. GST)
Schneider Electric, PowerPact MCCB 4P 40A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 341-148
  • Mfr. Part No. BJF46040
Each
$3,443.14(exc. GST)
Schurter 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 269-3855
  • Mfr. Part No. 7010.3440
Each
$8.21(exc. GST)
Schurter 2A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 173-8067
  • Mfr. Part No. 8020.5071.G
1 Box of 1000
$828.08(exc. GST)
Omron Busbar
  • RS Stock No. 111-3536
  • Mfr. Part No. PYDN-7.75-030Y
Each
$5.92(exc. GST)
Siemens 63A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 203-2023
  • Mfr. Part No. 3NA6122
Each (In a Pack of 3)
$59.43(exc. GST)
Siemens Fuse Holder Retaining Spring
  • RS Stock No. 202-7090
  • Mfr. Part No. 5SH5400
Each (In a Pack of 25)
$1.746(exc. GST)
Schurter Thermal Circuit Breaker - T12 Single Pole 240V ac Voltage Rating, 2A Current Rating
  • RS Stock No. 173-9802
  • Mfr. Part No. 4410.0126
Each (In a Box of 20)
$46.346(exc. GST)
63A Cartridge Fuse, 39 x 46mm
  • RS Stock No. 263-048
  • Mfr. Part No. 63MJ25-6
1 Pack of 10
$907.87(exc. GST)
Sensata Airpax Airpax Thermal Circuit Breaker - IUGN1 Single Pole Panel Mount, 5A Current Rating
  • RS Stock No. 275-0275
  • Mfr. Part No. IUGN1-1-62-5.00-U
1 Box of 5
$864.70(exc. GST)
Siemens 4A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 627-053
  • Mfr. Part No. 3NC1204-0MK
1 Pack of 20
$466.07(exc. GST)
Eaton 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9408
  • Mfr. Part No. S500-400-R
1 Bag of 1000
$5,643.00(exc. GST)
Schurter 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 384-027
  • Mfr. Part No. 3101.0015
Each (In a Pack of 5)
$8.872(exc. GST)
Eaton 35A NH Fuse, 58 x 30 x 135mm, 400V ac
  • RS Stock No. 261-564
  • Mfr. Part No. 35NHG01B-400
1 Pack of 3
$55.21(exc. GST)
Schneider Electric Square D QO120 MCB Mini Circuit Breaker, 1P + N, 20A Curve C, 240V AC, 10000 A Breaking Capacity
  • RS Stock No. 339-300
  • Mfr. Part No. QO120C10RCBO30F
Each
$871.35(exc. GST)
Siemens SENTRON Retrofit Kit
  • RS Stock No. 277-0939
  • Mfr. Part No. 3WA9111-0EK62
1 Set
$1,167.80(exc. GST)
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9803
  • Mfr. Part No. 3VA1116-6GD42-0AA0
Each
$2,624.05(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9683
  • Mfr. Part No. 3VA11106FE420AA0
Each
$1,518.52(exc. GST)
Mersen 40A NH Fuse, NH000, 500V ac
  • RS Stock No. 375-9575
  • Mfr. Part No. N212463C-RS
Each (In a Pack of 3)
$18.833(exc. GST)
Eaton 80A Bolted Tag Fuse, B1, 660 V ac, 350V dc
  • RS Stock No. 182-1659
  • Mfr. Part No. TC80
Each
$145.52(exc. GST)
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