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

661 of 999+
ABB RCBO, 10A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5204
  • Mfr. Part No. 2CSR274101R1104
Each
£344.20
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-7980
  • Mfr. Part No. LV426777
Each
£785.60
Better World
Schneider Electric Acti 9 Acti9 iDT40K MCB, 1+N, 40A Curve C, 230V AC
  • RS Stock No. 238-3417
  • Mfr. Part No. A9P71640
Each
£35.96
Schneider Electric, Compact MCCB 3P 800A, Breaking Capacity 100 kA
  • RS Stock No. 340-924
  • Mfr. Part No. C080L3WM
Each
£3,367.25
Schneider Electric RCBO
  • RS Stock No. 256-4059
  • Mfr. Part No. A9TYA4225
Each
£483.82
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-675
  • Mfr. Part No. 3VA5212-5EF31-0AA0
Each
£804.82
Schneider Electric TransferPacT Electronic Circuit Breaker 160A TA160, Fixed
  • RS Stock No. 272-7587
  • Mfr. Part No. TA16D4S1604TPE
Each
£2,356.06
Schneider Electric, ComPacT MCCB 3P 80A, Fixed Mount
  • RS Stock No. 260-9537
  • Mfr. Part No. C10R3TM080
Each
£936.87
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5150
  • Mfr. Part No. 3VA2125-6HL46-0AA0
Each
£611.60
Schneider Electric EasyPact Electronic Circuit Breaker 25A, Plug In
  • RS Stock No. 122-456
  • Mfr. Part No. LV510331P
Each
£111.97
Better World
Schneider Electric, EcoStruxure, 1.5A, POWERTAG, Wired
  • RS Stock No. 248-3711
  • Mfr. Part No. A9XMSB11
Each
£573.63
RS PRO 100A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3646
1 Bag of 10
£184.64
Hager Hager NEN Circuit Breaker, 3P, 32A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 599-905
  • Mfr. Part No. NEN332
Each
£147.05
Eaton Standard Series Distribution Board
  • RS Stock No. 125-784
  • Mfr. Part No. 174203 IKA-1/4-OT
Each
£26.42
Better World
Siemens SENTRON 5SL60 MCB, 1P + N, 25A Curve C, 230V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 328-347
  • Mfr. Part No. 5SL6025-7KL
Each
£46.10
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 7A Current Rating
  • RS Stock No. 175-1458
  • Mfr. Part No. GV4LE07N
Each
£397.36
Schurter Panel Mount Fuse Holder for 5 x 20mm Fuse, 500V ac
  • RS Stock No. 123-8467
  • Mfr. Part No. 0031.1611
Each
£5.03
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-498
  • Mfr. Part No. 3VA5580-7EC32-2AA0
Each
£3,116.46
Hager RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 251-2020
  • Mfr. Part No. ADC810F
Each
£214.63
Better World
Schneider Electric Easypact Cvs100...250, Easypact Cvs400...630, Nsx100...250, Nsx400...630 Cover for use with Vigi
  • RS Stock No. 221-1191
  • Mfr. Part No. LV429316
Each
£18.10
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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.
Read more
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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.
Read more
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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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