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

50958 Products showing for Fuses & Circuit Breakers

722 of 999+
Hager BD RCCB, 63A, 4P Pole, 30mA, Type AC
  • RS Stock No. 602-054
  • Mfr. Part No. BD466
Each
£485.02
Schneider Electric Multi9 M9F1 MCB, 2P, 25A Curve D, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 212-079
  • Mfr. Part No. M9F12225
Each
£102.49
ABB 1.25kA Tag Fuse, 200 x 68 x 119mm, 500V
  • RS Stock No. 251-3499
  • Mfr. Part No. 1SCA022627R7830
Each
£147.07
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 35A, Breaking Capacity 35 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-370
  • Mfr. Part No. 3VA5135-5ED21-0AA0
Each
£212.14
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7869
  • Mfr. Part No. C25B42D160
Each
£1,523.95
BB-EV 2 Phase Busbar, 690V, 17.8mm Pitch
  • RS Stock No. 247-377
  • Mfr. Part No. 168864 BB-EVP-10/2P-1MU
Each
£31.38
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 160A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 229-919
  • Mfr. Part No. 113254 NZMN2-S160-SVE
Each
£907.31
Littelfuse 1A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 541-3007
  • Mfr. Part No. 0313001.MXP
Each (In a Pack of 10)
£0.793
Eaton xEffect FAZ MCB, 3P, 35A Curve D, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 235-151
  • Mfr. Part No. 102275 FAZ-D35/3-NA
Each
£273.81
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 20A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6081
  • Mfr. Part No. A9P12620
Each
£60.45
Legrand DX3 RCCB, 40A, 1+N Pole, 30mA, Type A
  • RS Stock No. 732-0118
  • Mfr. Part No. 4 116 38
Each
£129.70
Schurter TA11 Thermal Circuit Breaker - T11-211 Single Pole 240V ac Voltage Rating Universal Mount, 6A Current Rating
  • RS Stock No. 269-3820
  • Mfr. Part No. 4400.0050
Each
£6.37
SIBA 6.3A F Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3420
  • Mfr. Part No. 70-010-04/6.3A
Each (In a Pack of 5)
£4.28
Siemens 1.6kA Tag Fuse, 162 x 72mm, 690V
  • RS Stock No. 300-042
  • Mfr. Part No. 3NB3357-1KK26
Each
£797.40
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 4 channels
  • RS Stock No. 155-865
  • Mfr. Part No. 3VA2440-7KQ42-0AA0
Each
£3,349.12
Mersen 16A British Standard Fuse, 17 x 49mm, 690V, 61 → 65.5mm
  • RS Stock No. 238-3947
  • Mfr. Part No. X220958
Each
£31.53
Eaton 630A Base Mount Fuse Holder, 1P, 1.4kV
  • RS Stock No. 182-1370
  • Mfr. Part No. 170H3005
Each
£113.70
ABB S800S MCB, 2P, 25A Curve C, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-682
  • Mfr. Part No. 2CCS862001R0254
Each
£148.91
Siemens 2A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 203-2046
  • Mfr. Part No. 3NW6002-1
Each (In a Pack of 10)
£3.575
Schurter 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 866-3441
  • Mfr. Part No. 0031.1667
Each (In a Pack of 100)
£2.963
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MCBs Guide
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