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

34963 Products showing for Fuses & Circuit Breakers

105 of 999+
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 500mA, 250V
  • RS Stock No. 767-5184
Each (In a Pack of 10)
$0.809(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-4746
  • Mfr. Part No. 1SDA073026R1
Each
$25,981.68(exc. GST)
Temporarily out of stock
Siemens SENTRON Rotary Operator for use with 3VA10/11
  • RS Stock No. 157-990
  • Mfr. Part No. 3VA9157-0EK23
Each
$548.09(exc. GST)
Temporarily out of stock
Hager MCCB 4P 125A, Breaking Capacity 2 kA, DIN Rail Mount
  • RS Stock No. 144-4931
  • Mfr. Part No. HCA126H
Each
$1,254.37(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 40A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7609
  • Mfr. Part No. 2CDS253001R0405 S203-B40
Each
$131.57(exc. GST)
In Stock
Eaton 6A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-327
  • Mfr. Part No. AAO6
Each (In a Pack of 5)
$17.818(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON Circuit breaker 4P 250A, DIN Rail Mount
  • RS Stock No. 224-7912
  • Mfr. Part No. 3VA2225-5HL42-0AA0
Each
$3,164.07(exc. GST)
Temporarily out of stock
RS PRO 60A Ceramic Cartridge Fuse, 15 x 22mm
  • RS Stock No. 188-4615
Each
$42.71(exc. GST)
Temporarily out of stock
Siemens SENTRON 1 Phase Busbar, 1mm Pitch
  • RS Stock No. 627-128
  • Mfr. Part No. 5ST3663-1HG
1 Pack of 10
$271.26(exc. GST)
Temporarily out of stock
Hager RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 602-217
  • Mfr. Part No. ADC817F
Each
$446.04(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-394
  • Mfr. Part No. 3VA5140-6ED31-1AA0
Each
$1,688.94(exc. GST)
Temporarily out of stock
Eaton 63A Tag Fuse, 22 x 86mm, 690V, 73mm
  • RS Stock No. 260-696
  • Mfr. Part No. TIS63
1 Pack of 20
$884.15(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Arrester, 4.2kV, DIN Rail Mount
  • RS Stock No. 493-502
  • Mfr. Part No. 1466776
Each
$475.13(exc. GST)
In Stock
SIBA 200mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3208
  • Mfr. Part No. 70-007-33/0.2A
Each (In a Pack of 10)
$0.165(exc. GST)
In Stock
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 2A Current Rating
  • RS Stock No. 284-5811
  • Mfr. Part No. 4400.0047
Each
$28.22(exc. GST)
In Stock
Eaton Eaton Moeller NZM Rotary Handle
  • RS Stock No. 247-083
  • Mfr. Part No. 100733 NZM1-XDGVR
Each
$79.71(exc. GST)
Temporarily out of stock
Siemens SENTRON Undervoltage Release for use with 3VA1 and 3VA20-26
  • RS Stock No. 157-837
  • Mfr. Part No. 3VA9908-0BB12
Each
$440.85(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 Acti9 iC60 MCB, 3P, 63A, Type AC, 500V AC, 300 mA Breaking Capacity
  • RS Stock No. 347-125
  • Mfr. Part No. A9V15363
Each
$1,689.36(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 4P 100A, Fixed Mount
  • RS Stock No. 254-6309
  • Mfr. Part No. C11B44V100L
Each
$3,588.84(exc. GST)
In Stock
Eaton 32A Bolted Tag Fuse, 500 V dc, 690V ac, 63.5mm
  • RS Stock No. 182-1786
  • Mfr. Part No. 32ET
Each
$45.30(exc. GST)
1
105
1749
Results per page

Related links