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

245 of 999+
In Stock
Mersen 5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 270-3015
  • Mfr. Part No. C090576
Each (In a Box of 10)
$1.425(exc. GST)
Temporarily out of stock
Eaton 16A Base Mount Fuse Holder for D01mm Fuse, 3P, 400V
  • RS Stock No. 261-682
  • Mfr. Part No. TFRN01-SB
1 Pack of 5
$197.13(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 110A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-513
  • Mfr. Part No. 3VA5111-6ED11-1AA0
Each
$1,441.92(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-569
  • Mfr. Part No. 3VA6110-5HN31-0AA0
Each
$2,040.62(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-576
  • Mfr. Part No. 3VA5580-7GC46-2AA0
Each
$16,908.07(exc. GST)
In Stock
Legrand 4A F Ceramic Cartridge Fuse, 8.5 x 23mm
  • RS Stock No. 293-8109
  • Mfr. Part No. 0 113 04
Each (In a Pack of 10)
$3.592(exc. GST)
In Stock
ABB DDA200 RCD, 40A, 4 Pole, 30mA, Type AC
  • RS Stock No. 183-3652
  • Mfr. Part No. 2CSB204001R1400
Each
$385.76(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 150A, Fixed Mount
  • RS Stock No. 260-7959
  • Mfr. Part No. C25R32M150
Each
$5,245.90(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 320A, Fixed Mount
  • RS Stock No. 260-8088
  • Mfr. Part No. C40F31M320
Each
$6,736.55(exc. GST)
In Stock
RS PRO 100A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3645
Each (In a Pack of 5)
$28.306(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9866
  • Mfr. Part No. 3VA1125-5GE42-0AA0
Each
$1,170.64(exc. GST)
Temporarily out of stock
Siemens 4A Cartridge Fuse, 10 X 38mm
  • RS Stock No. 665-111
  • Mfr. Part No. 3NW2040-0HG
1 Pack of 10
$346.21(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-625
  • Mfr. Part No. 3VA5140-4EF41-0AA0
Each
$1,494.87(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4581
  • Mfr. Part No. 3VA2125-7KQ42-0AA0
Each
$4,815.90(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-229
  • Mfr. Part No. 3VA6225-7KT41-2AA0
Each
$19,063.66(exc. GST)
In Stock
Eaton 40A British Standard Fuse, F2, 415V ac
  • RS Stock No. 122-9577
  • Mfr. Part No. ESD40
Each (In a Pack of 5)
$92.158(exc. GST)
Temporarily out of stock
Eaton Eaton xComfort Installaton Accessory for use with Cable Retainer, Conductor Terminal, Device Support rails, Front
  • RS Stock No. 124-953
  • Mfr. Part No. 178870 KLV-1HWP-4PR
Each
$124.00(exc. GST)
Temporarily out of stock
Schneider Electric A9R RCCB, 40A, 2 Pole, 30mA, Type AC, 220 → 240V ac
  • RS Stock No. 653-863
  • Mfr. Part No. A9R41240
Each
$543.28(exc. GST)
Temporarily out of stock
Siemens 40A Tag Fuse, 88mm, 690V, 71.2mm
  • RS Stock No. 608-782
  • Mfr. Part No. 3NC1840-0MK
1 Pack of 3
$131.51(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 250-089
  • Mfr. Part No. 3VA6580-5HM32-0AA0
Each
$10,831.01(exc. GST)
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