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

694 of 999+
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-9499
  • Mfr. Part No. C10N3TM050
Each
£565.64
Schneider Electric Acti9 C120 MCB, 1P, 125A, 415V AC
  • RS Stock No. 358-301
  • Mfr. Part No. A9N18545
1 Pack of 8
£4,435.82
Siemens SENTRON 5SY8 MCB, 4P, 500mA Curve D, 400V AC, 70 kA Breaking Capacity
  • RS Stock No. 610-617
  • Mfr. Part No. 5SY8405-8
Each
£269.99
Schneider Electric, ComPacT MCCB 4P 160A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 347-112
  • Mfr. Part No. C16N47E160
Each
£4,362.43
Schneider Electric, PowerPact MCCB 3P 60A, Breaking Capacity 14 kA, DIN Rail Mount
  • RS Stock No. 429-279
  • Mfr. Part No. NHDF36060TW
Each
£986.94
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7505
  • Mfr. Part No. C10W42D100
Each
£1,739.27
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 1kA, Breaking Capacity 35 kA, Cable Mount
  • RS Stock No. 249-133
  • Mfr. Part No. 3VA6610-6HN36-0AA0
Each
£4,699.73
Eaton 400A Fuse Holder for NH2 Fuse, 3P, 440 V ac/dc, 690 V ac/dc
  • RS Stock No. 127-395
  • Mfr. Part No. 183068 XNH2-FCL-S400-BT
Each
£424.94
Eaton xEffect FAZ MCB, 4P, 160mA Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 258-236
  • Mfr. Part No. 279042 FAZ-C0,16/4
Each
£202.38
Schneider Electric, ComPacT MCCB 3P 80A, Fixed Mount
  • RS Stock No. 260-7459
  • Mfr. Part No. C10V36M080
Each
£2,229.96
Schneider Electric, PowerPact MCCB 1P 70A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 346-802
  • Mfr. Part No. BJF16070
Each
£600.11
Schneider Electric, ComPacT MCCB 3P 150A, Fixed Mount
  • RS Stock No. 260-7970
  • Mfr. Part No. C25R3MA150
Each
£1,921.74
Littelfuse 160mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4296A
  • Mfr. Part No. 0217.160MXP
Each (In a Pack of 100)
£0.381
Schneider Electric, ComPacT MCCB 3P 25A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 428-747
  • Mfr. Part No. C11H34V025B
Each
£2,212.84
Schneider Electric, ComPacT New generation MCCB 4P 125A, Breaking Capacity 1500 V, Fixed Mount
  • RS Stock No. 205-316
  • Mfr. Part No. C25F4TM125D3
Each
£1,267.38
Schneider Electric Cross Elbow Busbar Trunking, 290 → 800mm, 630A, Canalis Series
  • RS Stock No. 335-039
  • Mfr. Part No. KSA630DZE41A
Each
£1,877.97
Schneider Electric, ComPacT MCCB 3P 16A, Fixed Mount
  • RS Stock No. 260-7643
  • Mfr. Part No. C11N3TM016L
Each
£394.12
Better World
Schneider Electric Vigi iTG40 RCD, 25A, 1+N Pole, 300mA
  • RS Stock No. 191-6138
  • Mfr. Part No. A9Y13625
Each
£257.52
Schneider Electric, ComPacT MCCB 4P 1.6kA, Breaking Capacity 42 kA, Fixed Mount
  • RS Stock No. 429-390
  • Mfr. Part No. C160H450FM
Each
£7,507.20
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7981
  • Mfr. Part No. C25R45E160
Each
£3,456.53
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