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

305 of 999+
Temporarily out of stock
onsemi Thermal Fuse +125°C 3 A, 5V
  • RS Stock No. 195-8753P
  • Mfr. Part No. NIS6350MT1TXG
Each (Supplied on a Reel)
$2.242(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-4862
  • Mfr. Part No. 3VA1110-5EE46-0AA0
Each
$1,468.08(exc. GST)
Temporarily out of stock
Siemens SIRIUS Undervoltage Release for use with Motor Circuit Breaker
  • RS Stock No. 157-849
  • Mfr. Part No. 3RV2922-1CV0
Each
$214.52(exc. GST)
In Stock
Eaton 8A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-106
  • Mfr. Part No. C10M8 CYLINDRICAL FUSE 10 x 38 8A AM 500V AC
1 Pack of 10
$24.71(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-404
  • Mfr. Part No. 3VA5340-7GF41-0AA0
Each
$13,614.67(exc. GST)
In Stock
ABB Electronic Circuit Breaker 0.5A 24V EPD24, DIN Rail Mount
  • RS Stock No. 914-4590
  • Mfr. Part No. 2CDE601101R2905
Each
$441.17(exc. GST)
In Stock
RS PRO Thermal Circuit Breaker - 2 Pole 250V ac Voltage Rating, 3A Current Rating
  • RS Stock No. 774-0106
Each
$6.22(exc. GST)
Temporarily out of stock
Littelfuse SMD Non Resettable Fuse 2A, 32V
  • RS Stock No. 820-7189P
  • Mfr. Part No. 0441002.WR
Each (Supplied on a Reel)
$1.331(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 209-4853
  • Mfr. Part No. 3VA1110-3EE42-0AA0
Each
$1,231.43(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Withdrawable Unit for use with INX40…3-…W, IZMX40…3-…W
  • RS Stock No. 132-332
  • Mfr. Part No. 183944 IZMX-CAS403-2000-SEC-1
Each
$8,561.18(exc. GST)
Temporarily out of stock
Siemens SENTRON 1 Phase Busbar, 10mm Pitch
  • RS Stock No. 231-3100
  • Mfr. Part No. 5ST3765
Each (In a Pack of 10)
$64.518(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-023
  • Mfr. Part No. 3VA6560-7HM46-0AA0
Each
$14,015.34(exc. GST)
Temporarily out of stock
Eaton Enclosure for use with Circuit Breakers, Switch Disconnectors
  • RS Stock No. 103-802
  • Mfr. Part No. 138544 MCCB3-630/I48/I43E-200
Each
$2,170.09(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 70A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-059
  • Mfr. Part No. 3VA5270-5EC31-2AA0
Each
$2,157.24(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 250-108
  • Mfr. Part No. 3VA6560-6HN32-0AA0
Each
$8,924.94(exc. GST)
Temporarily out of stock
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0835
  • Mfr. Part No. 3WA9111-0AW22
Each
$194.50(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS Stock No. 226-6549
  • Mfr. Part No. 37011000000
Each (In a Pack of 10)
$1.194(exc. GST)
Unavailable
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 3P 250A, Fixed Mount
  • RS Stock No. 221-1084
  • Mfr. Part No. LV438203
Each
$2,232.79(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. 245-681
  • Mfr. Part No. 3VA6140-6JT31-0AA0
Each
$6,491.23(exc. GST)
Temporarily out of stock
Eaton 16A Bolted Tag Fuse, F2, 550V ac
  • RS Stock No. 181-8763
  • Mfr. Part No. ESD16
Each
$43.13(exc. GST)
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