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

1734 of 999+
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3235
  • Mfr. Part No. 1SDA071123R1
Each
$31,743.02(exc. GST)
Temporarily out of stock
Eaton 4A Bolt Fixing Photovoltaic Fuse, 10 x 38mm, 1000V dc, 49.7mm
  • RS Stock No. 703-8254P
  • Mfr. Part No. PV-4A10-T
Each (Supplied in a Bag)
$97.17(exc. GST)
Temporarily out of stock
FUSE 5X20MM H PACK (P)
  • RS Stock No. 552-247
  • Mfr. Part No. 021502.5HXP
1 Pack of 100
$54.67(exc. GST)
Temporarily out of stock
ABB Tmax T Undervoltage Release for use with Circuit Breaker
  • RS Stock No. 232-0163
  • Mfr. Part No. 1SDA063552R1 UVR T7-M-X1 230VAC/DC
Each
$646.80(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-4538
  • Mfr. Part No. 1SDA072774R1
Each
$8,953.60(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 250-007
  • Mfr. Part No. 3VA6560-6JT32-0AA0
Each
$12,647.43(exc. GST)
In Stock
Schurter SMD Non Resettable Fuse 10A, 32 V ac, 63V dc
  • RS Stock No. 703-2770P
  • Mfr. Part No. 3413.0328.22
Each (Supplied on a Reel)
$0.884(exc. GST)
In Stock
SUT 6.3x32 Time Lag 30A 250VAC 100VDC
  • RS Stock No. 577-306
  • Mfr. Part No. 8020.0607.H
Each
$1.23(exc. GST)
In Stock
Bourns Surface Mount Fuse 2.5A, 65V dc
  • RS Stock No. 245-9256P
  • Mfr. Part No. SF-1206SA250M-2
Each (Supplied on a Reel)
$1.406(exc. GST)
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-3098
  • Mfr. Part No. 1SDA070950R1
Each
$23,193.90(exc. GST)
In Stock
ABB DDA202 RCD, 63A, 2 Pole, 30mA
  • RS Stock No. 231-9888
  • Mfr. Part No. 2CSB202001R1630 DDA202 AC-63/0.03
Each
$421.26(exc. GST)
In Stock
Wickmann 500mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 174-0644
  • Mfr. Part No. 0477.500MXP
Each (In a Pack of 5)
$3.314(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-680
  • Mfr. Part No. 3VA6140-6JQ31-2AA0
Each
$8,790.87(exc. GST)
In Stock
Littelfuse SMD Non Resettable Fuse 500mA, 63V
  • RS Stock No. 820-7044P
  • Mfr. Part No. 0437.500WR
Each (Supplied on a Reel)
$1.15(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 4 channels
  • RS Stock No. 155-886
  • Mfr. Part No. 3VA2440-6HM42-0AA0
Each
$9,117.45(exc. GST)
Currently unavailable
Schneider Electric EasyPact Electronic Circuit Breaker 32A, Fixed
  • RS Stock No. 122-386
  • Mfr. Part No. LV510602
Each
$887.22(exc. GST)
Temporarily out of stock
Siemens SENTRON Option Plug
  • RS Stock No. 277-0963
  • Mfr. Part No. 3WA9111-0EX10
Each
$2,798.95(exc. GST)
Temporarily out of stock
Littelfuse SMD Non Resettable Fuse 3.5A, 32V
  • RS Stock No. 820-7195P
  • Mfr. Part No. 044103.5WR
Each (Supplied on a Reel)
$1.397(exc. GST)
In Stock
Socomec 6A F Cartridge Fuse, 14 x 51mm
  • RS Stock No. 223-2825
  • Mfr. Part No. 60530006
Each (In a Pack of 10)
$12.004(exc. GST)
Temporarily out of stock
Weidmüller Surge Arrester, 15kA, 1500V dc, Screw Mount Mount
  • RS Stock No. 285-5299
  • Mfr. Part No. 2764160000
Each
$608.30(exc. GST)
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