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

50973 Products showing for Fuses & Circuit Breakers

96 of 999+
Eaton 1A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 458-8504
  • Mfr. Part No. KTK-1
Each (In a Pack of 5)
£13.452
Better World
Schneider Electric RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 790-9263
  • Mfr. Part No. A9D11232
Each
£241.88
Littelfuse SMD Non Resettable Fuse 500mA, 125V ac/dc
  • RS Stock No. 541-3350
  • Mfr. Part No. 0451.500MRL
Each (In a Pack of 10)
£1.111
Better World
Schneider Electric Multi 9 C60BP MCB, 3P, 63A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2434
  • Mfr. Part No. M9F42363
Each
£134.37
Better World
ABB System Pro M Compact S200 MCB, 2P, 25A Curve C, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7728
  • Mfr. Part No. 2CDS252001R0254 S202-C25
Each
£42.83
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 10A Current Rating
  • RS Stock No. 210-2062
  • Mfr. Part No. 3120-N521-H7T1-W01D-10A
Each
£27.59
Siemens 50A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-929
  • Mfr. Part No. 3NA3820
1 Pack of 3
£54.84
Better World
Siemens Sentron 5SY4 MCB, 3P, 3A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 622-0092
  • Mfr. Part No. 5SY4303-7
Each
£91.37
Mersen 5A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4339
  • Mfr. Part No. ATDR5
Each
£22.10
Contactum MCB, 3P, 32A Curve D, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9045
  • Mfr. Part No. CPB1032D3
Each
£14.68
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3192
  • Mfr. Part No. A9F53216
Each
£74.84
Eaton 80A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 703-8471
  • Mfr. Part No. C22G80
1 Pack of 10
£36.16
Littelfuse SMD Non Resettable Fuse 3.15A, 125V
  • RS Stock No. 738-2902
  • Mfr. Part No. 04513.15MRL
Each (In a Pack of 10)
£0.878
Spelsberg Consumer Unit Ake 05
  • RS Stock No. 475-1336
  • Mfr. Part No. 73550501
Each
£43.52
Littelfuse 2.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3079A
  • Mfr. Part No. 021702.5MXP
Each (In a Pack of 100)
£0.09
Schneider Electric Mureva Enclosure
  • RS Stock No. 466-0533
  • Mfr. Part No. 13443
Each
£106.87
Better World
Schneider Electric iID RCCB, 25A, 4 Pole, 300mA, 380 → 415V ac
  • RS Stock No. 806-7335
  • Mfr. Part No. A9R44425
Each
£179.36
Europa EUC1P EUC MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6490
  • Mfr. Part No. EUC1P4C
Each
£6.92
Better World
ABB SN201 MCB, 2P, 6A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 231-9972
  • Mfr. Part No. 2CSS255101R0064 SN201-C6 -
1 Box of 1
£33.49
RS PRO Three Phase Industrial Surge Protector, 50kA, 2kV, DIN Rail Mount
  • RS Stock No. 101-805
Each
£91.58
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