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

47265 Products showing for Fuses & Circuit Breakers

49 of 999+
In Stock
Bulgin 13A Panel Mount Fuse Holder for 6.3 x 25mm Fuse, 1P, 250V ac
  • RS Stock No. 408-397
  • Mfr. Part No. FX0416
Each
HK$85.70
In Stock
Littelfuse 20A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 878-1580
  • Mfr. Part No. 0FLM020.T
Each
HK$114.20
In Stock
Littelfuse SMD Non Resettable Fuse 40A, 72V
  • RS Stock No. 895-1603P
  • Mfr. Part No. 0456040.DR
Each (Supplied on a Reel)
HK$33.18
In Stock
Littelfuse 50A Red BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6703
  • Mfr. Part No. 153.5631.5501
Each (In a Pack of 5)
HK$25.60
In Stock
Schurter PC Board Non Resettable Fuse, Radial 315mA, 250V ac
  • RS Stock No. 284-5287
  • Mfr. Part No. 0034.6610
Each (In a Pack of 10)
HK$2.45
Temporarily out of stock
Siemens SENTRON 5SJ4 MCB, 2P, 16A Curve C, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 212-8818
  • Mfr. Part No. 5SJ4216-7HG41
Each
HK$1,169.60
In Stock
Europa EUC1P EUB MCB, 1P, 20A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6471
  • Mfr. Part No. EUC1P20B
Each
HK$62.00
In Stock
Europa EUC2P EUC MCB, 2P, 1A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6538
  • Mfr. Part No. EUC2P1C
Each
HK$226.50
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 35A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-365
  • Mfr. Part No. 3VA5135-5EC31-1AA0
Each
HK$3,844.20
In Stock
Eaton 6A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 414-617
  • Mfr. Part No. NIT6
Each (In a Pack of 5)
HK$61.22
Temporarily out of stock
Schneider Electric A9R RCCB, 80A, 4 Pole, 415V
  • RS Stock No. 245-147
  • Mfr. Part No. A9R21480
Each
HK$6,104.10
In Stock
Better World
Siemens Sentron 5SY4 MCB, 4P, 6A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3192
  • Mfr. Part No. 5SY4406-8
Each
HK$1,698.30
In Stock
ABB RCBO, 32A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5102
  • Mfr. Part No. 2CSR254001R1324
Each
HK$2,531.00
Temporarily out of stock
Better World
ABB System Pro M Compact S200M MCB, 4P, 20A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-8093
  • Mfr. Part No. 2CDS274001R0205 S204M-B20
Each
HK$1,109.10
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 10A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-1964
  • Mfr. Part No. 5SY4110-6
Each
HK$400.20
In Stock
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1177
  • Mfr. Part No. S500-2-R
Each (In a Pack of 10)
HK$3.08
In Stock
Eaton 20A Bolt In Mount 6.3 x 32mm Fuse Block, 300V ac/dc
  • RS Stock No. 852-7225
  • Mfr. Part No. S-8201-1-R
Each
HK$9.30
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-358
  • Mfr. Part No. 3VA5320-6EC41-0AA0
Each
HK$15,031.20
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 20A Curve B, 400V AC, 110V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7564
  • Mfr. Part No. 2CDS252001R0205 S202-B20
Each
HK$449.30
In Stock
Eaton 20A Rail Mount Fuse Holder
  • RS Stock No. 418-631
  • Mfr. Part No. RS20LOCK
Each (In a Pack of 3)
HK$870.20
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