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

172 of 999+
In Stock
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 216-4285
  • Mfr. Part No. 7093.0110
Each
$190.67(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7770
  • Mfr. Part No. C16H3
Each
$1,999.73(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-295
  • Mfr. Part No. 3VA6340-7KL31-0AA0
Each
$8,611.03(exc. GST)
Temporarily out of stock
Eaton 450A Tag Fuse, 72 x 150mm, 500V
  • RS Stock No. 229-036
  • Mfr. Part No. 450NHG3B NH FUSE 450A 500V 3 GG/GL SIZE 3
1 Pack of 3
$207.15(exc. GST)
In Stock
Mersen 80mA Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-843
  • Mfr. Part No. Z090504Q
1 Box of 10
$26.51(exc. GST)
Temporarily out of stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 80A Current Rating
  • RS Stock No. 175-1512
  • Mfr. Part No. GV4P80B6
Each
$1,056.79(exc. GST)
Temporarily out of stock
100A Fuse Holder for 1.5 x 2.1 x 2.91in Fuse, 600V
  • RS Stock No. 261-990
  • Mfr. Part No. TCFH100N
1 Pack of 6
$561.84(exc. GST)
In Stock
Eaton 32A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-377
  • Mfr. Part No. AAO32
Each (In a Pack of 5)
$16.25(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 4A Curve D, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9658
  • Mfr. Part No. A9F75204
Each
$297.69(exc. GST)
Temporarily out of stock
Schneider Electric CompacT Cover Frame for use with ComPacT NS630b
  • RS Stock No. 654-854
  • Mfr. Part No. C125H4WM
Each
$10,983.47(exc. GST)
In Stock
Mersen 25A Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-2711
  • Mfr. Part No. C213603
1 Box of 10
$46.72(exc. GST)
Temporarily out of stock
SENTRON Terminal Cover for use with 3VA55, 3VA65 Series
  • RS Stock No. 263-782
  • Mfr. Part No. 3VA9671-0WD30
Each
$513.41(exc. GST)
Temporarily out of stock
Hager Electronic Circuit Breaker 1A NFN, 1 channels
  • RS Stock No. 251-2078
  • Mfr. Part No. NFN101
Each
$123.54(exc. GST)
In Stock
WAGO Electronic Circuit Breaker 8A 24V 787, 1 channels , DIN Rail
  • RS Stock No. 279-4126
  • Mfr. Part No. 787-2861/108-020
Each
$166.87(exc. GST)
Limited stock
ETI 16A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-852
  • Mfr. Part No. 2311405
Each (In a Pack of 5)
$2.556(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, Masterpact MCCB 4P 3.2kA, Fixed Mount
  • RS Stock No. 248-3812
  • Mfr. Part No. LV848318
Each
$86,569.25(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 40A
  • RS Stock No. 224-7852
  • Mfr. Part No. 3VA1140-4ED26-0AA0
Each
$803.34(exc. GST)
Temporarily out of stock
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0838
  • Mfr. Part No. 3WA9111-0AX11
Each
$79.63(exc. GST)
Temporarily out of stock
RS PRO 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 188-4480
1 Box of 2000
$12,202.83(exc. GST)
In Stock
Eaton 355A British Standard Fuse, BS88/B3, BS88/B4, 415V, 111mm
  • RS Stock No. 161-054
  • Mfr. Part No. ED355
Each
$109.01(exc. GST)
1
172
1758
Results per page

Related links