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

182 of 999+
Last RS stock
Wickmann 2A Resettable Fuse, 12V dc
  • RS Stock No. 174-0710
  • Mfr. Part No. 1812L200/12DR
Each (In a Pack of 5)
$2.876(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 100A, Fixed Mount
  • RS Stock No. 254-6284
  • Mfr. Part No. C10F32D100
Each
$1,845.66(exc. GST)
Temporarily out of stock
Siemens 63A D02 Neozed Fuse, gR, 400V
  • RS Stock No. 216-4806
  • Mfr. Part No. 5SE1363
Each (In a Pack of 10)
$68.908(exc. GST)
Currently unavailable
Nidec Components 0.05A Resettable Fuse, 60V
  • RS Stock No. 637-6280
  • Mfr. Part No. PRCP-R005-0-99
Each (In a Pack of 10)
$1.076(exc. GST)
Temporarily out of stock
Eaton 630A Bolted Tag Fuse, C2, 450 V dc, 660V ac, 133mm
  • RS Stock No. 182-1401
  • Mfr. Part No. TTM630
Each
$669.75(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 300A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 256-561
  • Mfr. Part No. 3VA5330-7EC31-2AA0
Each
$10,777.78(exc. GST)
In Stock
Bourns 0.12A Resettable Fuse, 30V
  • RS Stock No. 647-8241
  • Mfr. Part No. MF-NSMF012-2
Each (In a Pack of 10)
$0.626(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2744
  • Mfr. Part No. 2906831
Each
$39.84(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2755
  • Mfr. Part No. 2906844
Each
$51.55(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2751
  • Mfr. Part No. 2906838
Each
$44.80(exc. GST)
In Stock
Eaton 25A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 181-8898
  • Mfr. Part No. 25NZ02
Each
$7.55(exc. GST)
Temporarily out of stock
Schneider Electric 4 Phase Surge Arrester, 75kA, 3000V (Volts), Clip-On Mount
  • RS Stock No. 438-793
  • Mfr. Part No. M9L57690
Each
$3,465.58(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2743
  • Mfr. Part No. 2906829
Each
$41.92(exc. GST)
Being discontinued
RS PRO 800mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-554
Each (In a Pack of 10)
$0.893(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS Stock No. 895-1672P
  • Mfr. Part No. 38211000410
Each (Supplied in a Bag)
$1.349(exc. GST)
In Stock
Schneider Electric Acti9 Busbar, 440V ac, 18mm Pitch
  • RS Stock No. 466-492
  • Mfr. Part No. A9XPF524
1 Pack of 5
$895.39(exc. GST)
In Stock
Murrelektronik Limited Electronic Circuit Breaker
  • RS Stock No. 123-6693
  • Mfr. Part No. 9000-41042-0100600
Each
$391.22(exc. GST)
In Stock
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 500mA Current Rating
  • RS Stock No. 333-221
  • Mfr. Part No. 201-0.5A
Each
$79.09(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 226-0490
  • Mfr. Part No. 37005000000
Each (In a Pack of 10)
$1.132(exc. GST)
Currently unavailable
Thermal limiter Z
  • RS Stock No. 657-228
  • Mfr. Part No. LIM-Q-82-Z-110-5-100-10A
Each
$12.57(exc. GST)
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