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

73 of 999+
Europa EUC2P EUC MCB, 2P, 16A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6541
  • Mfr. Part No. EUC2P16C
Each
£15.36
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 3P, 20A Curve D, 415V AC, 10000 A Breaking Capacity
  • RS Stock No. 339-807
  • Mfr. Part No. SE10D320
Each
£97.88
Phoenix Contact 1.25A T Cartridge Fuse, 5 x 20mm
  • RS Stock No. 129-488
  • Mfr. Part No. 1208801
Each
£7.22
Eaton xEffect MCB, 2P, 5A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3380
  • Mfr. Part No. 102163 FAZ-C5/2-NA
Each
£89.77
Schurter 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7801
  • Mfr. Part No. 0001.2511
Each (In a Bag of 10)
£0.526
Better World
Schneider Electric Acti 9 A9N1 MCB, 3P, 100A Curve D
  • RS Stock No. 221-0891
  • Mfr. Part No. A9N18513
Each
£313.87
RS PRO 1.6A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8106
Each (In a Pack of 50)
£0.118
RS PRO 32A Slotted Tag Fuse, A1, 250 V dc, 415V ac, 44.5mm
  • RS Stock No. 221-3697
1 Bag of 5
£40.12
Eaton 63A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 181-8779
  • Mfr. Part No. C22M63
Each
£4.80
ABB System Pro M Compact S200 MCB, 1P, 32A Curve B, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 488-6943
  • Mfr. Part No. 2CDS251001R0325 - S201B32
Each
£16.31
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 1A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2354
  • Mfr. Part No. M9F22101
Each
£28.97
Better World
Schneider Electric Acti 9 A9N1 MCB, 3P, 125A Curve D
  • RS Stock No. 219-8302
  • Mfr. Part No. A9N18514
Each
£333.86
Better World
Siemens RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type A, SENTRON Range
  • RS Stock No. 187-3283
  • Mfr. Part No. 5SV1316-6KK16
Each
£101.90
Contactum 6 Way Steel Consumer Unit, 63A Defender
  • RS Stock No. 184-9134
  • Mfr. Part No. DR068MS
Each
£89.66
Schneider Electric TeSys Thermal Magnetic Circuit Breaker - GB2 1P + N Pole 250V ac Voltage Rating DIN Rail Mount, 2A
  • RS Stock No. 323-9009
  • Mfr. Part No. GB2CD07
Each
£47.67
Allen Bradley 1492 1492-SPM MCB, 2P, 6A Curve B, 277V AC, 96V DC, 10 kA Breaking Capacity
  • RS Stock No. 125-1432
  • Mfr. Part No. 1492-SPM2B060
Each
£37.87
Schneider Electric Acti9 3 Phase Distribution Board, 4 Way, 250 A
  • RS Stock No. 244-936
  • Mfr. Part No. SE12B250
Each
£300.11
Rittal Earth Clip
  • RS Stock No. 826-2861
  • Mfr. Part No. 7829200
Each
£9.16
Schurter 5 x 20mm Fuse Block
  • RS Stock No. 498-2653
  • Mfr. Part No. 4301.1405
Each
£3.09
Eaton 750mA F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 848-2772
  • Mfr. Part No. AGC-3-4-R
Each
£2.22
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Guides & Articles

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RCBOs Guide
There are many things to consider when choosing the right RCBO. Find out more in our comprehensive RCBOs guide.
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Fuses Guide
Our fuses guide explains what they are, what they are used for, how they work, and the different types available.
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Distribution Boards Guide
Our distribution boards guide explains what they are, their uses and types, and how to connect distribution boards.
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MCBs Guide
What are MCBs and how do they work? Discover all you need to know in our comprehensive guide.
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