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

46580 Products showing for Fuses & Circuit Breakers

20 / 999+
In Stock
ABB SMISSLINE TP S400E MCB, 1P, 16A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 178-190
  • Mfr. Part No. 2CCS551001R0165 - S401EB16
Each
MYR81.18
Temporarily out of stock
Contactum MCB, 3P, 63A Curve C, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9054
  • Mfr. Part No. CPB1063C3
Each
MYR113.74
In Stock
Littelfuse 1.6A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8041
  • Mfr. Part No. 021601.6MXP
Each (In a Bag of 10)
MYR5.911
In Stock
Eaton 160A Solid Link for NH Fuses
  • RS Stock No. 255-347
  • Mfr. Part No. 263114 Z-NH-00/TR
1 Pack of 3
MYR176.33
In Stock
Mersen 5A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6782
  • Mfr. Part No. S084311
Each (In a Pack of 10)
MYR20.513
Temporarily out of stock
Schneider Electric 480V ac Undervoltage Release Circuit Trip for use with ComPacT
  • RS Stock No. 339-774
  • Mfr. Part No. 33673
Each
MYR3,776.05
Temporarily out of stock
RS PRO 2A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8045
Each (In a Box of 500)
MYR3.555
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 63A Curve D, 440V AC, 12V DC, 6 kA Breaking Capacity
  • RS Stock No. 527-9677
  • Mfr. Part No. 2CDS253001R0631 S203-D63
Each
MYR486.13
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 25A Curve B, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3395
  • Mfr. Part No. A9F76225
Each
MYR768.57
In Stock
RS PRO 2.5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-403
Each (In a Pack of 10)
MYR1.618
In Stock
Littelfuse 8A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0098
  • Mfr. Part No. 0313008.HXP
Each (In a Pack of 5)
MYR5.33
In Stock
Eaton RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, PXK Range
  • RS Stock No. 183-3546
  • Mfr. Part No. 236965 PXK-C20/1N/003-A
Each
MYR426.41
In Stock
Better World
ABB System Pro M Compact S200M MCB, 1P, 8A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-8119
  • Mfr. Part No. 2CDS271001R0084 S201M-C8
Each
MYR127.60
In Stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 63A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1391
  • Mfr. Part No. 5SY4363-8
Each
MYR782.99
In Stock
ABB System Pro M Compact S200M MCB, 1P, 16A Curve B, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-5995
  • Mfr. Part No. 2CDS271001R0165 S201M-B16
Each
MYR118.66
In Stock
Eaton 500mA F Glass Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 851-1485
  • Mfr. Part No. AGX-1-2
Each
MYR11.85
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 100A, Breaking Capacity 90 kA, Fixed Mount
  • RS Stock No. 254-6300
  • Mfr. Part No. C10N3TM100
Each
MYR3,189.95
In Stock
Littelfuse 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 769-0054
  • Mfr. Part No. 02193.15MXABP
Each (In a Pack of 10)
MYR10.26
In Stock
Mersen 6A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2927
  • Mfr. Part No. W085257
1 Box of 10
MYR1,304.77
In Stock
ETA Thermal Circuit Breaker - 2 5700 Single Pole 250V Voltage Rating Panel Mount, 16A Current Rating
  • RS Stock No. 729-2764
  • Mfr. Part No. 2-5700-IG2-P10-DD-000040-16A
Each
MYR171.07
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