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

263 of 999+
Last RS stock
Wickmann 1.6A Resettable Fuse, 72 V ac, 72V dc
  • RS Stock No. 174-0795
  • Mfr. Part No. RF2637-000
Each (In a Pack of 20)
$1.066(exc. GST)
Temporarily out of stock
Eaton Eaton xEnergy Main Busbar Support for use with Busbar
  • RS Stock No. 241-430
  • Mfr. Part No. 133074 XNNS-30X20X1300
1 Pack of 5
$924.91(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 2.5kA , DIN Rail
  • RS Stock No. 132-325
  • Mfr. Part No. 183923 IZMX40B4-V25W-1
Each
$44,959.26(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)
In Stock
Socomec 2A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 172-3019
  • Mfr. Part No. 60520002
Each (In a Box of 10)
$25.17(exc. GST)
In Stock
RS PRO SMD Non-Resettable Surface Mount Fuse 1A, 63V
  • RS Stock No. 252-2194
Each (In a Pack of 50)
$1.218(exc. GST)
In Stock
Siemens 2A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 396-304
  • Mfr. Part No. 3NC1402
Each (In a Pack of 10)
$48.08(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 1P, 4A Curve D, 440V AC, 60V DC, 50 kA Breaking Capacity
  • RS Stock No. 664-366
  • Mfr. Part No. 5SY8104-8
Each
$129.10(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 20A Curve K, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-8065
  • Mfr. Part No. 2CDS254001R0487 S204-K20
Each
$388.37(exc. GST)
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 8A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2796
  • Mfr. Part No. 2908262
Each
$131.16(exc. GST)
In Stock
ABB Cover for use with ABB Tmax XT1
  • RS Stock No. 831-9210
  • Mfr. Part No. 1SDA066905R1 KIT FC Cu XT1 3pcs
Each (In a Pack of 3)
$43.16(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 268-454
  • Mfr. Part No. 3VA6110-8KT31-0AA0
Each
$5,247.35(exc. GST)
In Stock
Circuit-breaker/thermal 16 A
  • RS Stock No. 577-467
  • Mfr. Part No. 2-5700-IG2-P10-DD-16A
Each
$36.65(exc. GST)
In Stock
Mersen 16A Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-2758
  • Mfr. Part No. G211560
1 Box of 10
$169.72(exc. GST)
Currently unavailable
Wickmann 5A Resettable Fuse, 30V dc
  • RS Stock No. 174-0373
  • Mfr. Part No. 30R500UMR
1 Box of 1000
$1,421.54(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller xPole 4 Phase Busbar, 415V
  • RS Stock No. 247-901
  • Mfr. Part No. 132910 EVG-3P+3N/20MODUL
Each
$71.70(exc. GST)
In Stock
Wickmann 1.1A Resettable Fuse, 16V dc
  • RS Stock No. 174-0682
  • Mfr. Part No. 1210L110/16WR
Each (In a Pack of 10)
$1.254(exc. GST)
In Stock
Mersen 315A NH Fuse, NH2, 500V ac
  • RS Stock No. 136-0602
  • Mfr. Part No. K219820 / NH2GG50V315-1
Each
$95.72(exc. GST)
In Stock
Wickmann SMD Non Resettable Fuse 20A, 250V
  • RS Stock No. 174-0699
  • Mfr. Part No. 0463020.ER
Each (In a Pack of 20)
$7.26(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 250-083
  • Mfr. Part No. 3VA6560-6HM46-0AA0
Each
$13,140.74(exc. GST)
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