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

118 of 999+
Mersen 10A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0600
  • Mfr. Part No. A1014576 / FR10GR69V10
Each
$23.14(exc. GST)
ABB OS Interlock for use with Switch Fuses
  • RS Stock No. 259-9730
  • Mfr. Part No. 1SCA106534R1001
Each
$209.23(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-560
  • Mfr. Part No. 3VA6140-5KT31-2AA0
Each
$5,471.60(exc. GST)
Eaton IZMX/INX Cassette for use with INX40…3-…W, IZMX40…3-…W
  • RS Stock No. 132-336
  • Mfr. Part No. 183948 IZMX-CAS403-3200-1
Each
$10,254.88(exc. GST)
Hager Hager HMX Circuit Breaker, 3P, 40A Curve C, 415V AC, 50 kA Breaking Capacity
  • RS Stock No. 599-872
  • Mfr. Part No. HMX340
Each
$1,218.21(exc. GST)
Siemens ALPHA Busbar
  • RS Stock No. 226-0831
  • Mfr. Part No. 8GK9733-0KK10
Each
$82.27(exc. GST)
200A NH Fuse, 63 x 40 x 150mm, 400V ac
  • RS Stock No. 252-889
  • Mfr. Part No. 200NHG02B-400
1 Pack of 3
$66.90(exc. GST)
RS PRO 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3414
Each (In a Pack of 10)
$0.495(exc. GST)
Siemens 16A Centred Tag Fuse, NH1, 500V
  • RS Stock No. 230-2942
  • Mfr. Part No. 3NA6105
Each (In a Pack of 3)
$59.43(exc. GST)
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-346
  • Mfr. Part No. KV PC 9106
Each
$124.54(exc. GST)
Schneider Electric, ComPacT MCCB 2P 25A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 428-738
  • Mfr. Part No. C10F2TM025
Each
$1,392.05(exc. GST)
Schneider Electric Acti9 Acti9 iC60 MCB, 2P, 40A Curve B, 500V AC, 6000 A Breaking Capacity
  • RS Stock No. 341-105
  • Mfr. Part No. A9F76240
Each
$495.76(exc. GST)
Hager Hager HMX Circuit Breaker, 2P, 50A Curve C, 415V AC, 50 kA Breaking Capacity
  • RS Stock No. 599-867
  • Mfr. Part No. HMX250
Each
$892.63(exc. GST)
Siemens SENTRON Service Tool for use with IEC 3WL (Release 2) And 3VA TD400 Kit
  • RS Stock No. 266-520
  • Mfr. Part No. 3VW9011-0AT40
Each
$2,511.55(exc. GST)
Schneider Electric Acti 9 3 Phase Distribution Board, 24 Way, 250 A
  • RS Stock No. 230-6805
  • Mfr. Part No. MB200ADIN
Each
$1,556.74(exc. GST)
Siemens SENTRON Cover Frame for use with RCD520, RCD820
  • RS Stock No. 161-951
  • Mfr. Part No. 3VA9303-0SB40
Each
$173.93(exc. GST)
Bourns Single, Three Phase Surge Protector, 50kA, 0.7kV, DIN Rail Mount
  • RS Stock No. 287-9616
  • Mfr. Part No. 1250A-1S-120
Each
$135.98(exc. GST)
Eaton 30A Glass Melamine Cartridge Fuse, 0.56 x 0.87in
  • RS Stock No. 261-429
  • Mfr. Part No. TPS-30
1 Pack of 10
$817.09(exc. GST)
Mersen Surge Protector, 40kA, Plug In Mount
  • RS Stock No. 179-3076
  • Mfr. Part No. 83020006 / SP2-40K1000V-PV
Each
$86.03(exc. GST)
Eaton 32A Fuse Holder for 10 x 38mm Fuse, 3P, 690V ac
  • RS Stock No. 263-151
  • Mfr. Part No. CHM3DU
1 Pack of 4
$153.37(exc. GST)
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