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

46578 Products showing for Fuses & Circuit Breakers

295 / 999+
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 5A, 250V ac
  • RS Stock No. 377-2203
  • Mfr. Part No. 3821500041
Each (In a Pack of 10)
MYR6.685
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-7905
  • Mfr. Part No. C25H32D250
Each
MYR12,018.36
In Stock
Schneider Electric Linergy Busbar
  • RS Stock No. 130-537
  • Mfr. Part No. LVS04536
Each
MYR2,177.90
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 160A, Fixed Mount
  • RS Stock No. 254-6345
  • Mfr. Part No. C16F3TM160
Each
MYR5,389.93
Temporarily out of stock
Eaton BCZ-A Door for use with Distribution Boards
  • RS Stock No. 248-684
  • Mfr. Part No. 101579 BCZ-A-TWS-2/26
Each
MYR414.99
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 500mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-202
  • Mfr. Part No. 3RV2421-0FA10
Each
MYR547.45
Temporarily out of stock
ABB Tmax XT Shunt Opening Release for use with Tmax XT
  • RS Stock No. 237-6048
  • Mfr. Part No. 1SDA066319R1 SOR XT1..XT4 480-525VAC
Each
MYR565.61
In Stock
ETA Thermal Circuit Breaker - 3120-N 5 Pole 50 V DC, 240 V AC Voltage Rating, 20A Current Rating
  • RS Stock No. 210-2109
  • Mfr. Part No. 3120-N554-P7T1-W02D-20A
Each
MYR181.17
Temporarily out of stock
Eaton 2A Bolted Tag Fuse, 1.2 kV ac, 660V dc, 124mm
  • RS Stock No. 181-8435
  • Mfr. Part No. TAC2
Each (In a Box of 10)
MYR225.972
In Stock
ABB 100A Tag Fuse, 79 x 30 x 60mm, 690V
  • RS Stock No. 250-4461
  • Mfr. Part No. 1SCA022700R9520
1 Box of 3
MYR159.40
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 40A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 178-8158
  • Mfr. Part No. LV426263
Each
MYR2,365.38
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 2P, 13A, Type A, 400V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 610-311
  • Mfr. Part No. 5SY4213-5
Each
MYR599.37
Temporarily out of stock
Siemens 224A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 210-6930
  • Mfr. Part No. 3NA7242-6
Each (In a Pack of 3)
MYR365.707
Temporarily out of stock
ABB, XT2N MCCB 4P 63A, Fixed Mount
  • RS Stock No. 237-6239
  • Mfr. Part No. 1SDA067098R1 XT2N 160 Ekip I 63A FF
Each
MYR4,690.54
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit, Canalis Series
  • RS Stock No. 211-0398
  • Mfr. Part No. KBC16DCB226
Each (In a Pack of 10)
MYR203.908
In Stock
Eaton 16A Cartridge Fuses, 14 x 51mm
  • RS Stock No. 229-187
  • Mfr. Part No. C14G16S CYL FUSE >STR >14 x 51 16A GG 500V AC
1 Pack of 10
MYR402.17
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 1+N, 25A Curve B, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-9029
  • Mfr. Part No. 5SY7525-6
Each
MYR393.24
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 226-6599
  • Mfr. Part No. 3721200000
Each (In a Pack of 10)
MYR4.915
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 260-7594
  • Mfr. Part No. C11F3TM063L
Each
MYR2,283.13
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1.25kA, Breaking Capacity 42 kA, Fixed Mount
  • RS Stock No. 347-094
  • Mfr. Part No. C125H350FM
Each
MYR74,413.11
1
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