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

246 of 999+
Temporarily out of stock
Hager Hager NKN Circuit Breaker, 4P, 16A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-802
  • Mfr. Part No. NKN416
Each
$536.94(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT Control Unit for use with Compact NS630b to NS1600
  • RS Stock No. 341-526
  • Mfr. Part No. C7AWM
Each
$8,737.36(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-280
  • Mfr. Part No. 3VA5112-6GC41-0AA0
Each
$4,176.77(exc. GST)
In Stock
Littelfuse 1A Resettable Fuse, 32V dc
  • RS Stock No. 712-7519
  • Mfr. Part No. AHEF100
Each (In a Pack of 10)
$1.177(exc. GST)
In Stock
Mersen 800A size 33 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2215
  • Mfr. Part No. Z300080
Each
$552.55(exc. GST)
Temporarily out of stock
Eaton IZMX-RR110AD-40-1 Electronic Circuit Breaker 110 → 125V , Plug In
  • RS Stock No. 132-455
  • Mfr. Part No. 184126 IZMX-RR110AD-40-1
Each
$748.67(exc. GST)
Last RS stock
Schurter PC Board Non Resettable Fuse, Axial 10A, 125V ac/dc
  • RS Stock No. 110-8565
  • Mfr. Part No. 7010.7150.13
Each (In a Pack of 5)
$3.918(exc. GST)
In Stock
Schneider Electric, ComPacT NSX Circuit breaker 1P 30A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-227
  • Mfr. Part No. IL0301P253
Each
$387.15(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3755
  • Mfr. Part No. 3VA2040-6JQ46-0AA0
Each
$5,049.43(exc. GST)
In Stock
TE Connectivity for use with Circuit Breaker
  • RS Stock No. 782-7824
  • Mfr. Part No. 1-1423696-6
Each (In a Pack of 5)
$7.546(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 3P, 4A Curve B, 400V AC, 60V DC, 35 kA Breaking Capacity
  • RS Stock No. 610-299
  • Mfr. Part No. 5SY4304-6
Each
$227.95(exc. GST)
Temporarily out of stock
Siemens 50A DIIImm Bottle Fuse, M18 Thread Size, gG, 690V
  • RS Stock No. 626-971
  • Mfr. Part No. 5SD8050
1 Pack of 5
$211.43(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 50A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 214-770
  • Mfr. Part No. C11B44V050L
Each
$4,157.81(exc. GST)
In Stock
Schurter Thermal Circuit Breaker - T12 Single Pole 240V ac Voltage Rating, 600mA Current Rating
  • RS Stock No. 284-6038
  • Mfr. Part No. 4410.0039
Each
$50.69(exc. GST)
Being discontinued
RS PRO 5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6045
Each (In a Pack of 10)
$1.987(exc. GST)
In Stock
Schneider Electric R9PR RCCB, 63A, 4 Pole, 30mA, Type AC, 400V
  • RS Stock No. 276-8976
  • Mfr. Part No. R9PRC463
Each
$802.70(exc. GST)
Temporarily out of stock
Lovato Single Phase Surge Protector, 100kA, DIN Rail Mount
  • RS Stock No. 248-5665
  • Mfr. Part No. SA1B3PA320R
Each
$1,742.61(exc. GST)
Temporarily out of stock
Eaton 80A Cartridge Fuse, 2.66 x 1in
  • RS Stock No. 260-706
  • Mfr. Part No. TPL-BB
1 Pack of 5
$1,030.06(exc. GST)
In Stock
Legrand 1A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6106
  • Mfr. Part No. 0 130 01
Each (In a Box of 10)
$5.955(exc. GST)
Temporarily out of stock
ABB PBFC 3, 3+N Phase Busbar
  • RS Stock No. 202-501
  • Mfr. Part No. 1STQ007409A0000
Each
$2,299.80(exc. GST)
1
246
1758
Results per page

Related links