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

279 of 999+
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 4P, 25A Curve D, 400V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 610-440
  • Mfr. Part No. 5SY7425-8
Each
$634.49(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4318
  • Mfr. Part No. 1SDA072472R1
Each
$32,858.08(exc. GST)
Temporarily out of stock
Eaton xEnergy Basic Distribution Board Enclosure
  • RS Stock No. 230-234
  • Mfr. Part No. 116664 BPM-O-800/7-P
Each
$2,041.39(exc. GST)
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 2.5A, 250V ac
  • RS Stock No. 226-0939P
  • Mfr. Part No. 3701250000
Each (Supplied as a Tape)
$2.329(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 3 channels
  • RS Stock No. 259-4431
  • Mfr. Part No. 1SDA072622R1
Each
$80,360.98(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-106
  • Mfr. Part No. 3VA2140-5HM36-0AA0
Each
$2,509.19(exc. GST)
Temporarily out of stock
Socomec 160A Base Mount Fuse Holder for 0 Fuse, 690V
  • RS Stock No. 224-2561
  • Mfr. Part No. 63012016
Each
$440.81(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-7470
  • Mfr. Part No. C10V42D040
Each
$5,643.00(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1.6kA, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-858
  • Mfr. Part No. C160N350FM
Each
$15,440.32(exc. GST)
Temporarily out of stock
onsemi Thermal Fuse +125°C 1 A, 5V
  • RS Stock No. 195-8751P
  • Mfr. Part No. NIS6150MT2TXG
Each (Supplied on a Reel)
$2.366(exc. GST)
In Stock
WR-FSH Fuseholder Clip Black SMT 5x20mm
  • RS Stock No. 563-074
  • Mfr. Part No. 696103201002
1 Pack of 5
$23.14(exc. GST)
Temporarily out of stock
ABB 125A Tag Fuse, 150 x 40 x 72mm, 690V
  • RS Stock No. 250-4471
  • Mfr. Part No. 1SCA022701R0450
1 Box of 3
$188.34(exc. GST)
In Stock
Schurter 1A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3873
  • Mfr. Part No. 8020.5068
Each
$1.65(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA, 4 channels
  • RS Stock No. 155-869
  • Mfr. Part No. 3VA2450-7HK42-0AA0
Each
$9,657.76(exc. GST)
In Stock
Siemens 10A DII Diazed Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 396-308
  • Mfr. Part No. 5SB251
Each (In a Pack of 5)
$2.47(exc. GST)
Unavailable
Schneider Electric ComPact Trip Unit for use with Compact NSX 100/160/250 circuit breakers
  • RS Stock No. 221-0927
  • Mfr. Part No. LV429111
Each
$3,661.37(exc. GST)
Temporarily out of stock
Eaton 63A Fuse Holder for 57 x 54 x 201mm Fuse, 3P, 400V ac
  • RS Stock No. 247-075
  • Mfr. Part No. 100664 Z-D02/R/3-54
Each
$68.66(exc. GST)
New product - Preorder today
FUSE 250V IEC TD LBC 5X20 1.6A
  • RS Stock No. 565-500
  • Mfr. Part No. 021801.6TXP
Each
$103.20(exc. GST)
Temporarily out of stock
Legrand 45A Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 266-3167
  • Mfr. Part No. 0 152 45
1 Box of 10
$156.86(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LI, 4 channels
  • RS Stock No. 259-3555
  • Mfr. Part No. 1SDA071534R1
Each
$15,239.63(exc. GST)
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