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

187 of 999+
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-4680
  • Mfr. Part No. 1SDA072957R1
Each
$24,792.22(exc. GST)
Better World
Schneider Electric Acti 9 A9N1 MCB, 3P, 125A Curve D
  • RS Stock No. 219-8302
  • Mfr. Part No. A9N18514
Each
$1,157.28(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 268-432
  • Mfr. Part No. 3VA6110-7KL41-2AA0
Each
$5,942.49(exc. GST)
Phoenix Contact 5A Brown Automotive Car Fuse, 32V No
  • RS Stock No. 253-7606
  • Mfr. Part No. 2908367
Each (In a Pack of 2)
$19.49(exc. GST)
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0288
  • Mfr. Part No. 8GK1061-4KK30
Each
$3,665.60(exc. GST)
Siemens SENTRON Interlock for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-523
  • Mfr. Part No. 3VW9011-0BA22
Each
$255.63(exc. GST)
Eaton Eaton Moeller xComfort RC Suppressor Circuit
  • RS Stock No. 259-333
  • Mfr. Part No. 292260 CMMZ-00/07
Each
$15.52(exc. GST)
Fuse/5x25mm 6.3A Medium Slow-Blow 241
  • RS Stock No. 565-372
  • Mfr. Part No. 24116300021
Each
$16.46(exc. GST)
Schneider Electric ComPacT NSX Mechanical Interlock for use with ComPacT NSX100, NSX160, NSX250
  • RS Stock No. 205-210
  • Mfr. Part No. LV429369ET
Each
$1,216.63(exc. GST)
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3451
  • Mfr. Part No. 1SDA071393R1
Each
$15,343.46(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 3 channels
  • RS Stock No. 156-815
  • Mfr. Part No. 3VA2225-8JQ32-0AA0
Each
$7,113.84(exc. GST)
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 5A Current Rating
  • RS Stock No. 782-8026
  • Mfr. Part No. W58-XC4C12A-5
Each
$15.91(exc. GST)
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-3505
  • Mfr. Part No. 1SDA071471R1
Each
$14,157.37(exc. GST)
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 655-144
  • Mfr. Part No. C080N320FM
Each
$7,393.07(exc. GST)
Schneider Electric Easy9 1+N Phase Busbar, 230V ac, 9 mm, 18 mm Pitch
  • RS Stock No. 654-221
  • Mfr. Part No. SEPNB112
Each
$142.19(exc. GST)
nVent ERICO Neutral Double Busbar Busbar
  • RS Stock No. 646-809
  • Mfr. Part No. 568716
Each
$9.81(exc. GST)
Siemens SENTRON 5SJ4 MCB, 1P, 5A Curve C, 14 kA Breaking Capacity
  • RS Stock No. 202-7225
  • Mfr. Part No. 5SJ4111-7HG40
Each
$114.82(exc. GST)
Better World
Schneider Electric Cable Connection Kit for use with Compact Nsx 100 To 630
  • RS Stock No. 221-1172
  • Mfr. Part No. LV429272
Each
$362.85(exc. GST)
Mersen 125A Rail Mount Fuse Holder for 22 x 58mm Fuse, N, 690V ac
  • RS Stock No. 768-3766
  • Mfr. Part No. K331094
Each
$66.03(exc. GST)
Schurter 3.15A Slow-Blow Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-8004
  • Mfr. Part No. 0034.5048
Each (In a Pack of 10)
$3.123(exc. GST)
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