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

112 of 999+
Limited stock
Better World
Schneider Electric 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V ac
  • RS Stock No. 482-871
  • Mfr. Part No. DF143C
Each
$142.09(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 260-601
  • Mfr. Part No. 3VA6325-5HN41-0AA0
Each
$8,102.57(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, Masterpact MCCB 3P 2kA, Fixed Mount
  • RS Stock No. 248-3779
  • Mfr. Part No. LV848057
Each
$27,454.13(exc. GST)
In Stock
ETA ESX10 Electronic Circuit breaker 6A 12V ESX10-T, 1 channels , Plug-In Mounting
  • RS Stock No. 210-2151
  • Mfr. Part No. ESX10-TC-124-DC12V-6A-E
Each
$172.99(exc. GST)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 258-847
  • Mfr. Part No. 290366 NZMH2-A250-S1
Each
$5,248.33(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 30A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-334
  • Mfr. Part No. 3VA5130-6EC41-0AA0
Each
$2,091.80(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 125A, Breaking Capacity 15 kA, Fixed Mount
  • RS Stock No. 341-214
  • Mfr. Part No. C25H6TM125
Each
$6,512.06(exc. GST)
Temporarily out of stock
Schneider Electric A9F Acti9 iC60 MCB, 2P, 1.6A Curve K, 500V AC, 125V DC, 400 V Breaking Capacity
  • RS Stock No. 334-997
  • Mfr. Part No. A9F95272
Each
$416.78(exc. GST)
In Stock
Eaton 50mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1666
  • Mfr. Part No. S506-50-R
Each (In a Pack of 10)
$2.097(exc. GST)
Temporarily out of stock
Eaton Eaton xEffect SASY 60i Busbar, 600V
  • RS Stock No. 240-654
  • Mfr. Part No. 107067 BBS-3/FL-NA
Each (In a Pack of 2)
$54.40(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1kA, Breaking Capacity 31 kA, Fixed Mount
  • RS Stock No. 341-199
  • Mfr. Part No. C100H32AFM
Each
$26,176.59(exc. GST)
Temporarily out of stock
SENTRON Busbar Connector for use with 3VA15, 3VA25 Series
  • RS Stock No. 263-777
  • Mfr. Part No. 3VA9603-0QB02
1 Kit
$381.23(exc. GST)
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-152
  • Mfr. Part No. KV 9354
Each
$721.03(exc. GST)
In Stock
ABB MCB, MCB Blank
  • RS Stock No. 136-7812
  • Mfr. Part No. 1TVC151800S2550
Each
$3.72(exc. GST)
Currently unavailable
ETI 10A D01 Neozed Fuse, E14 Thread Size, gG, 400V ac
  • RS Stock No. 415-963
  • Mfr. Part No. 2211004
Each (In a Pack of 5)
$3.276(exc. GST)
In Stock
Schurter Panel Mount Fuse Holder for 5 x 20mm Fuse, 500V ac
  • RS Stock No. 123-8467
  • Mfr. Part No. 0031.1611
Each
$13.17(exc. GST)
In Stock
Eaton 4A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-3917
  • Mfr. Part No. KTK-R-4
Each
$136.05(exc. GST)
In Stock
Siemens 35A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-913
  • Mfr. Part No. 3NA3814
Each (In a Pack of 3)
$16.353(exc. GST)
Temporarily out of stock
63A Fuse Holder for 36 x 71 x 81mm Fuse, 3P, 400V
  • RS Stock No. 263-405
  • Mfr. Part No. TFRN02C
1 Pack of 5
$283.61(exc. GST)
Temporarily out of stock
Phoenix Contact 3 Phase Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2800
  • Mfr. Part No. 2909635
Each
$533.18(exc. GST)
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