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

33476 Products showing for Fuses & Circuit Breakers

1 of 999+
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 231-9327
  • Mfr. Part No. 1SDA100345R1 XT5N 400 TMA 400-4000 3pFF
Each
PHP63,871.13(exc. VAT)
Better World
Schneider Electric iDPN Residual Current Circuit Breaker, 32A, 1+N Pole, 300mA, Type C, 400V
  • RS Stock No. 790-7315
  • Mfr. Part No. A9D42632
Each
PHP15,867.32(exc. VAT)
Penta Fiberglass Earth Set Max. Conductor Size Cable CC 70mm² / terre 35mm² 317.5mm
  • RS Stock No. 248-9889
  • Mfr. Part No. KPIMT49S
Each
PHP87,807.12(exc. VAT)
Schneider Electric Enclosure
  • RS Stock No. 466-0527
  • Mfr. Part No. 13441
Each
PHP6,629.32(exc. VAT)
RS PRO Three Phase Industrial Surge Protector, 50kA, 2kV, DIN Rail Mount
  • RS Stock No. 101-805
Each
PHP6,134.19(exc. VAT)
Schneider Electric, ComPacT NSX MCCB 3P 250A, Fixed Mount
  • RS Stock No. 254-6352
  • Mfr. Part No. C25F3
Each
PHP48,391.35(exc. VAT)
Mersen Surge Protector
  • RS Stock No. 251-3636
  • Mfr. Part No. 83020183 / STPT2-40K275V-2P-TE GROUND MONITORING
Each
PHP8,791.84(exc. VAT)
Eaton Single Phase Surge Protector, 40kA, 1.4kV, DIN Rail Mount
  • RS Stock No. 120-388
  • Mfr. Part No. 167594 SPCT2-280/2
Each
PHP16,520.65(exc. VAT)
Eaton 440mA F Melamine Cartridge Fuse, 10 x 35mm
  • RS Stock No. 459-7918
  • Mfr. Part No. DMM-B-44-100-R
Each (In a Pack of 5)
PHP3,973.952(exc. VAT)
RS PRO MCB, 3P, 63A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0210
Each
PHP1,255.28(exc. VAT)
Europa EUC2P EUC MCB, 2P, 2A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6531
  • Mfr. Part No. EUC2P2C
Each
PHP667.29(exc. VAT)
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4240
  • Mfr. Part No. 3VA1125-3ED36-0AA0
Each
PHP24,738.83(exc. VAT)
Schneider Electric Acti9 A9K MCB, 1P, 6A Curve B, 440V AC, 6000 A Breaking Capacity
  • RS Stock No. 140-024
  • Mfr. Part No. A9K01106
Each
PHP244.45(exc. VAT)
Better World
Siemens RCBO, 40A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 151-1218
  • Mfr. Part No. 5SU1356-7KK40
Each
PHP7,462.07(exc. VAT)
Better World
Schneider Electric, PowerPact MCCB Molded Case Circuit Breaker 3P 15A
  • RS Stock No. 221-0893
  • Mfr. Part No. BDL36015LU
Each
PHP25,479.03(exc. VAT)
Siemens SENTRON 2 Phase Busbar, 27mm Pitch
  • RS Stock No. 187-5177
  • Mfr. Part No. 5ST3640
Each
PHP668.11(exc. VAT)
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8958
  • Mfr. Part No. R9H18402
Each
PHP5,677.30(exc. VAT)
Better World
Schneider Electric Earthing Strap Tinned Copper 155 x 17mm Diameter
  • RS Stock No. 222-3853
  • Mfr. Part No. NSYEB1516D8
Each (In a Pack of 10)
PHP495.954(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 32A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3398
  • Mfr. Part No. A9F54332
Each
PHP6,512.33(exc. VAT)
Eaton 1A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8368
  • Mfr. Part No. C10G1
Each (In a Pack of 10)
PHP62.343(exc. VAT)
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