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

299 of 999+
In Stock
Mersen 20A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0608
  • Mfr. Part No. L1017185 / FR14GR69V20T
Each
$38.61(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-572
  • Mfr. Part No. 3VA6560-6JP32-2AA0
Each
$11,571.03(exc. GST)
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 169-9528
  • Mfr. Part No. SS-5-2A-BK
Each (In a Bag of 200)
$2.623(exc. GST)
Temporarily out of stock
Lovato Add-on blocks Mounting Kit for use with GL Series Switch Disconnectors
  • RS Stock No. 248-5565
  • Mfr. Part No. GLX502
Each
$92.25(exc. GST)
Temporarily out of stock
Siemens 160A Tag Fuse, 123.9mm, 800V, 110mm
  • RS Stock No. 608-854
  • Mfr. Part No. 3NB1025-1KK10
1 Pack of 3
$610.49(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-294
  • Mfr. Part No. 3VA6440-5KT41-0AA0
Each
$11,795.26(exc. GST)
In Stock
Mersen 6A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2951
  • Mfr. Part No. Y084799
1 Box of 10
$563.72(exc. GST)
In Stock
ABB 20A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9959
  • Mfr. Part No. OFAF000H20 1SCA022627R0740
Each
$11.33(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller xPole 3 Phase Busbar, 690V, 53.4mm Pitch
  • RS Stock No. 262-836
  • Mfr. Part No. 303366 EVG-3PHAS/N/6MODUL/LS
Each
$27.07(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-459
  • Mfr. Part No. 3VA6560-7HM42-0AA0
Each
$13,252.88(exc. GST)
In Stock
Siemens Connection Plug for use with S0 Size Circuit Breakers with Spring Terminal
  • RS Stock No. 124-3109
  • Mfr. Part No. 3RV2927-5AA00
Each
$7.77(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 895-1678P
  • Mfr. Part No. 37213150411
Each (Supplied in a Bag)
$1.093(exc. GST)
Temporarily out of stock
35A Cartridge Fuse, 21 x 87mm
  • RS Stock No. 262-966
  • Mfr. Part No. BAO35
1 Pack of 20
$1,002.27(exc. GST)
In Stock
Better World
Siemens, SENTRON MCCB 3P 80A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4339
  • Mfr. Part No. 3VA1180-3ED36-0AA0
Each
$919.22(exc. GST)
Temporarily out of stock
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 1kA, Breaking Capacity 25 kA, Cable Mount
  • RS Stock No. 249-221
  • Mfr. Part No. 3VA6610-5HL36-0AA0
Each
$14,755.33(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Acti 9 IC60L MCB, 3P, 40A, Type Z, 400V AC, 180V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 212-0126
  • Mfr. Part No. A9F92340
Each
$806.76(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 20 Way, 250 A
  • RS Stock No. 339-836
  • Mfr. Part No. SEB48S12250
Each
$10,313.48(exc. GST)
Temporarily out of stock
Schneider Electric Canalis 3 Phase Busbar, 1000V
  • RS Stock No. 280-134
  • Mfr. Part No. KTA2500ED4403
Each
$10,217.99(exc. GST)
In Stock
Eaton 4A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1105
  • Mfr. Part No. S505-4-R
Each (In a Pack of 10)
$0.594(exc. GST)
Being discontinued
RS PRO PC Board Non Resettable Fuse, Axial 3A, 250V ac
  • RS Stock No. 764-9558P
Each (Supplied in a Bag)
$1.085(exc. GST)
1
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