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

183 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-789
  • Mfr. Part No. 3VA6440-8JQ41-0AA0
Each
$15,966.25(exc. GST)
Temporarily out of stock
Phoenix Contact CB TM Thermal Magnetic Circuit Breakers - CB TM2 2 Pole 277V ac Voltage Rating Base Mounting, 12A
  • RS Stock No. 512-390
  • Mfr. Part No. 2800888
Each
$155.46(exc. GST)
In Stock
Bulgin 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 359-5719
  • Mfr. Part No. FX0455/S
Each (In a Pack of 5)
$16.74(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-706
  • Mfr. Part No. 3VA6210-6JP31-2AA0
Each
$11,112.22(exc. GST)
Temporarily out of stock
Siemens 350A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 210-6960
  • Mfr. Part No. 3NE1331-2
Each (In a Pack of 3)
$533.087(exc. GST)
Temporarily out of stock
Clipsal Electrical Surge Arrester, 40kA, 240V ac, DIN Rail Mount
  • RS Stock No. 282-3008
  • Mfr. Part No. MX9SP40C
Each
$94.67(exc. GST)
Temporarily out of stock
Siemens SENTRON Arc Chute
  • RS Stock No. 277-0806
  • Mfr. Part No. 3WA9111-0AS12
Each
$669.25(exc. GST)
In Stock
ABB Tmax T Undervoltage Release for use with T4, T5, T6 Circuit Breakers
  • RS Stock No. 225-5860
  • Mfr. Part No. 1SDA054891R1 UVR-C 230VAC/DC T4-6
Each
$472.93(exc. GST)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 6.3A, 250V ac
  • RS Stock No. 169-9554
  • Mfr. Part No. SS-5H-6-3A-BK
Each (In a Bag of 200)
$0.828(exc. GST)
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V Voltage Rating DIN Rail Mount, 50A Current
  • RS Stock No. 272-943
  • Mfr. Part No. GV3P50
Each
$1,206.36(exc. GST)
In Stock
Schneider Electric, ComPacT NSX Circuit breaker 1P 100A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-232
  • Mfr. Part No. IL1001P251
Each
$442.90(exc. GST)
In Stock
Littelfuse 2.5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3704
  • Mfr. Part No. 021602.5MXP
Each (In a Pack of 10)
$2.221(exc. GST)
Temporarily out of stock
Littelfuse 20A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 769-3763
  • Mfr. Part No. 0FLQ020.T
Each
$69.65(exc. GST)
In Stock
Eaton xComfort IKA standard series Distribution Board
  • RS Stock No. 125-763
  • Mfr. Part No. 174206 IKA-1/12-OT
Each
$137.34(exc. GST)
Temporarily out of stock
Siemens SENTRON Current Transformer for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-571
  • Mfr. Part No. 3VW9011-0AA30
Each
$784.84(exc. GST)
In Stock
SIBA 6.3A F Glass Cartridge Fuse, 5 x 30mm
  • RS Stock No. 361-8216
  • Mfr. Part No. 171530.6,3
Each (In a Pack of 10)
$5.513(exc. GST)
Temporarily out of stock
Eaton 25A Rail Mount Fuse Holder Base, 3P, 500V ac
  • RS Stock No. 232-017
  • Mfr. Part No. 107965 DII-SO/25/3-R
Each
$68.76(exc. GST)
Temporarily out of stock
Siemens 230V (Volts) Push Button Circuit Trip
  • RS Stock No. 213-2394
  • Mfr. Part No. 5TE4807
Each
$52.14(exc. GST)
Temporarily out of stock
Schneider Electric 32A Fuse Holder for 70 x 61mm Fuse, 3P+N, 690V
  • RS Stock No. 654-627
  • Mfr. Part No. DF103NV
Each
$103.23(exc. GST)
Temporarily out of stock
nVent ERIFLEX ERIFLEX Busbar, 25mm Pitch
  • RS Stock No. 277-6095
  • Mfr. Part No. 550230
Each (In a Pack of 4)
$350.798(exc. GST)
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