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

239 of 999+
In Stock
Safety fuse insert, gPV, 10 A, 10 x 38 m
  • RS Stock No. 286-0182
  • Mfr. Part No. 2783230000
Each (In a Pack of 10)
$15.503(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9703
  • Mfr. Part No. 3VA11123GD420AA0
Each
$1,777.09(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-280
  • Mfr. Part No. 3VA6210-7HM31-2AA0
Each
$12,003.67(exc. GST)
Temporarily out of stock
Eaton Three Phase Surge Protector, 40kA, 1.4kV, DIN Rail Mount
  • RS Stock No. 121-152
  • Mfr. Part No. 167629 SPCT2-280-3+NPE/BB
Each
$620.02(exc. GST)
In Stock
Mersen 6.3A FA Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 188-6681
  • Mfr. Part No. S084012
Each (In a Pack of 10)
$8.452(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA, 4 channels
  • RS Stock No. 156-776
  • Mfr. Part No. 3VA2463-7KQ42-0AA0
Each
$13,394.80(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)4(-4), NZM4(-4)
  • RS Stock No. 259-664
  • Mfr. Part No. 271515 NZM4-XTVDVR-60
Each
$772.31(exc. GST)
Temporarily out of stock
Phoenix Contact 3 Phase Surge Protector, 40kA, DIN Rail Mount
  • RS Stock No. 207-2705
  • Mfr. Part No. 2905345
Each
$805.20(exc. GST)
Temporarily out of stock
Eaton 125A Fuse Holder for 22.2 x 58mm Fuse, 2P, 690V
  • RS Stock No. 229-019
  • Mfr. Part No. CH222DU 2P 22x58 Fuse Holder
1 Pack of 3
$480.10(exc. GST)
Temporarily out of stock
ABB 800A Tag Fuse, 200 x 68 x 119mm, 500V
  • RS Stock No. 251-3497
  • Mfr. Part No. 1SCA022627R7670
Each
$409.49(exc. GST)
In Stock
Schneider Electric Resi9 3 Phase Busbar, 400V, 18mm Pitch
  • RS Stock No. 655-491
  • Mfr. Part No. R9XFH311
Each
$34.77(exc. GST)
Temporarily out of stock
Siemens 350A Tag Fuse, NH3mm, 2kV, 210mm
  • RS Stock No. 627-106
  • Mfr. Part No. 3NE7431-0U
1 Pack of 2
$1,458.16(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9379
  • Mfr. Part No. 3VA9383-0JB13
Each
$419.36(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 45A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-786
  • Mfr. Part No. 3VA5245-6ED31-2AA0
Each
$2,264.88(exc. GST)
New product - Preorder today
Hager CPC RCCB, 63A, 1P+N Pole, 300mA, Type AC, 230V ac
  • RS Stock No. 597-871
  • Mfr. Part No. CPC163F
Each
$691.46(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. 245-393
  • Mfr. Part No. 3VA6140-7KP31-2AA0
Each
$10,266.04(exc. GST)
Temporarily out of stock
Phoenix Contact 2 Phase Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2662
  • Mfr. Part No. 1044388
Each
$2,164.15(exc. GST)
Temporarily out of stock
Better World
Eaton 250A Tag Fuse, 217 x 82 x 94mm, 1kV, 167mm
  • RS Stock No. 282-6232
  • Mfr. Part No. PV-250A-2XL-B
Each
$983.41(exc. GST)
In Stock
RS PRO 4A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9800
Each (In a Pack of 10)
$1.506(exc. GST)
Currently unavailable
Bourns Surge Protector, 50kA, 2.5kV, DIN Rail Mount
  • RS Stock No. 287-9646
  • Mfr. Part No. 1420A-PV-1000-Y
Each (In a Box of 96)
$613.799(exc. GST)
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