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

50957 Products showing for Fuses & Circuit Breakers

99 of 999+
Better World
Schneider Electric RCBO, 10A Current Rating, 1P+N Poles, 10mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 790-9272
  • Mfr. Part No. A9D10810
Each
£176.61
Better World
Schneider Electric Compact Ins, Compact Insj, Compact Inv, Compact Nsx, Easypact Cvs Long Terminal Shield for use with
  • RS Stock No. 221-1266
  • Mfr. Part No. LV432596
Each
£79.95
Littelfuse 30A PCB Mount Fuse Holder, 80V
  • RS Stock No. 410-7672
  • Mfr. Part No. 178.6165.0002
Each
£3.58
Better World
Siemens RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 225-8764
  • Mfr. Part No. 5SU1356-0KK16
Each
£113.83
Siemens 160A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 396-354
  • Mfr. Part No. 3NE8024-1
Each (In a Pack of 3)
£72.267
Better World
Schneider Electric Compact Nsx, Easypact Cvs Cable Connector for use with 1 Cable 120 mm2 →185 mm
  • RS Stock No. 221-1162
  • Mfr. Part No. LV429260
Each
£70.09
MECATRACTION Lightning Earth Clamp
  • RS Stock No. 200-6912
  • Mfr. Part No. C4-1BR1125
Each (In a Box of 4)
£6.683
Eaton 40A British Standard Fuse, F2, 415V ac
  • RS Stock No. 122-9577
  • Mfr. Part No. ESD40
Each (In a Pack of 5)
£3.17
Eaton 32A Rail Mount Fuse Holder for F1 Fuse, 1P, 550V ac
  • RS Stock No. 415-339
  • Mfr. Part No. SC32H-D
Each
£9.72
Eaton xEffect MCB, 2P, 25A Curve D, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3550
  • Mfr. Part No. 278785 FAZ-D25/2
Each
£61.53
Schurter Surface Mount Fuse 50mA, 125V ac
  • RS Stock No. 270-7963
  • Mfr. Part No. 3413.0002.11
Each
£1.87
WJ Furse Copper Earth Bar L. 475mm x W. 90mm x H. 96mm 6 Ways
  • RS Stock No. 124-2500
  • Mfr. Part No. 7TCA083670R0676 LK243-6
Each
£198.99
Eaton 25A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 489-4512
  • Mfr. Part No. C10M25
Each (In a Pack of 10)
£1.316
Better World
Siemens Sentron 5SY4 MCB, 2P, 4A, 60V DC
  • RS Stock No. 772-1280
  • Mfr. Part No. 5SY4204-7
Each
£64.98
Schurter PC Board Non Resettable Fuse, Axial 63mA, 125V ac/dc
  • RS Stock No. 173-9701
  • Mfr. Part No. 7010.6300.13
Each (In a Bag of 100)
£1.017
Better World
Schneider Electric Multi 9 MCB, 1P, 10A Curve D, 10 kA Breaking Capacity
  • RS Stock No. 219-9143
  • Mfr. Part No. M9F23110
Each
£29.28
Socomec 32A Fuse Holder for 10 x 38mm Fuse, 1P, 1kV dc
  • RS Stock No. 252-3750
  • Mfr. Part No. 57PV0001
Each (In a Pack of 12)
£5.204
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3024
  • Mfr. Part No. BK-GMA-2-R
Each
£0.47
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 284-5855
  • Mfr. Part No. 4400.005
Each
£6.37
Littelfuse SMD Non Resettable Fuse 2A, 125V ac/dc
  • RS Stock No. 541-3401
  • Mfr. Part No. 0451002.MRL
Each (In a Pack of 10)
£0.933
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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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