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

663 of 999+
Better World
ABB, Tmax XT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-7468
  • Mfr. Part No. 1SDA067737R1 XT2N 160 TMG 160A FF
Each
£786.59
ABB RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 136-7789
  • Mfr. Part No. 2CSR275151R1324 DSE201 M C32 A30 - N Blue
Each
£103.00
Eaton xEffect - FRCmM RCCB, 40A, 2 Pole, 100mA, 240V ac
  • RS Stock No. 123-606
  • Mfr. Part No. 170438 FRCMM-40/2/01-S/A
Each
£243.68
Schneider Electric, PowerPact MCCB 2P 100A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 345-256
  • Mfr. Part No. BDF26100
Each
£538.95
Schneider Electric, ComPacT MCCB 3P 150A, Fixed Mount
  • RS Stock No. 260-8033
  • Mfr. Part No. C25W32M150
Each
£2,664.66
Sensata Airpax Airpax Thermal Circuit Breaker - IEG6 Single Pole Panel Mount, 45A Current Rating
  • RS Stock No. 275-0201
  • Mfr. Part No. IEG6-1-51-45.0-A-01-V
Each
£31.85
ABB SMISSLINE TP S400M MCB, 3P, 32A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 177-563
  • Mfr. Part No. 2CCS573001R0325 S403M-B32
Each
£84.16
Better World
Schneider Electric Acti9 1 Phase Busbar, 230 V, 400 V, 9mm Pitch
  • RS Stock No. 238-4090
  • Mfr. Part No. A9XPP712
Each (In a Pack of 12)
£79.024
Rockwell Automation 1694 Electronic Circuit Protectors Electronic Circuit breaker 2A 24V 1694-PM, 2 channels ,
  • RS Stock No. 218-8919
  • Mfr. Part No. 1694-PM222-CL2
Each (In a Pack of 4)
£58.90
Better World
Schneider Electric Acti9 iIG40 RCCB, 40A, 3+N Pole, 30mA, Type AC, 380 → 415V ac
  • RS Stock No. 238-3466
  • Mfr. Part No. A9R67740
Each
£324.06
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7505
  • Mfr. Part No. C10W42D100
Each
£1,739.27
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7446
  • Mfr. Part No. C10S4D
Each
£408.70
Schurter CBE Cover for use with TA45
  • RS Stock No. 269-3823
  • Mfr. Part No. 4430.0130
Each
£1.88
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-7919
  • Mfr. Part No. LV426707
Each
£956.93
Schneider Electric, PowerPact MCCB 1P 70A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 346-802
  • Mfr. Part No. BJF16070
Each
£600.11
Eaton 3A Cartridge Fuse, 195 x 25.4mm
  • RS Stock No. 245-934
  • Mfr. Part No. 12OBCNA3.15
Each
£159.86
Better World
Siemens SENTRON 5SL4 MCB, 3P, 2A Curve B, 400V AC, 72V DC
  • RS Stock No. 210-3363
  • Mfr. Part No. 5SL4302-6
Each
£87.64
Eaton BBA Busbar Adapter Busbar, 690V
  • RS Stock No. 251-045
  • Mfr. Part No. 199468 BBA0R-25-PI
Each (In a Pack of 2)
£48.03
Better World
Siemens SENTRON 5SY6 MCB, 1+N, 3A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8967
  • Mfr. Part No. 5SY6503-7
Each
£52.78
Eaton 140A British Standard Fuse, EET, 690 V, 700 V, 70mm
  • RS Stock No. 182-1456
  • Mfr. Part No. 140EET
Each (In a Box of 5)
£38.508
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