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

226 of 999+
Hager Hager NRN Circuit Breaker, 4P, 10A Curve C, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-710
  • Mfr. Part No. NRN410
Each
$591.14(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)
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)
FUSE 125V PICO II SB RoHS .500A
  • RS Stock No. 552-262
  • Mfr. Part No. 0473.500MAT1L
1 Bag of 100
$171.11(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)
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)
Littelfuse SMD Non Resettable Fuse 1.5A, 125V
  • RS Stock No. 738-2879
  • Mfr. Part No. 015401.5DR
Each (In a Pack of 10)
$3.689(exc. GST)
Schneider Electric ComPacT Control Unit for use with Compact NS630b to NS3200
  • RS Stock No. 341-226
  • Mfr. Part No. C5AFM
Each
$6,651.24(exc. GST)
Schneider Electric, Compact MCCB 3, 4 630A, Fixed Mount
  • RS Stock No. 247-1833
  • Mfr. Part No. 33537
Each
$4,560.50(exc. GST)
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3802
  • Mfr. Part No. 1SDA071807R1
Each
$57,204.30(exc. GST)
Eaton 125A NH Fuse, 63 x 40 x 150mm, 400V ac
  • RS Stock No. 241-509
  • Mfr. Part No. 125NHG02B-400
1 Pack of 3
$66.79(exc. GST)
Eaton IZMX40N3-V10F-1 Electronic Circuit Breaker 1kA , Fixed
  • RS Stock No. 132-866
  • Mfr. Part No. 183711 IZMX40N3-V10F-1
Each
$14,441.86(exc. GST)
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690 V ac → 1kV ac/dc
  • RS Stock No. 189-5339
  • Mfr. Part No. D1062718 / CUS102
Each
$60.46(exc. GST)
Better World
Siemens SIRIUS Electronic Circuit Breaker 160mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-732
  • Mfr. Part No. 3RV2411-0AA20
Each
$437.65(exc. GST)
Schneider Electric, Compact MCCB 3P 1kA, Fixed Mount
  • RS Stock No. 247-1762
  • Mfr. Part No. 33241
Each
$7,486.70(exc. GST)
Eaton xEnergy Main Distribution Board
  • RS Stock No. 259-241
  • Mfr. Part No. 284164 XPMMB0604
Each
$130.19(exc. GST)
Schneider Electric, Compact MCCB 4P 1kA, Fixed Mount
  • RS Stock No. 247-1780
  • Mfr. Part No. 33344
Each
$7,539.29(exc. GST)
Eaton Eaton xEnergy Handle for use with Circuit Breaker Plug-in Module
  • RS Stock No. 244-347
  • Mfr. Part No. 184641 XMR-AH
Each
$117.32(exc. GST)
Socomec 125A Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 252-5323
  • Mfr. Part No. 60620125
Each (In a Pack of 10)
$23.682(exc. GST)
Schneider Electric, Compact MCCB 3P 2.5kA, Fixed Mount
  • RS Stock No. 247-1879
  • Mfr. Part No. 34012
Each
$20,899.27(exc. GST)
1
226
1758
Results per page

Related links