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

47266 產品顯示為 Fuses & Circuit Breakers

10 of 999+
Bourns 0.065A Resettable Fuse, 220V
  • RS Stock No. 692-6778
  • Mfr. Part No. CMF-RL50-0
Each (In a Pack of 5)
HK$3.46
Phoenix Contact Thermal Circuit Breaker - TCP 0.25A Single Pole 65 V dc, 250V ac Voltage Rating, 250mA Current Rating
  • RS Stock No. 801-6895
  • Mfr. Part No. 0712123
Each
HK$128.00
Better World
Siemens Sentron 5SY6 MCB, 1P, 500mA Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 521-4989
  • Mfr. Part No. 5SY6105-7
Each
HK$185.50
Siemens SENTRON Wire Connector for use with 3VA5/6 400/600
  • RS Stock No. 269-7194
  • Mfr. Part No. 3VA9473-0JE23
Each (In a Pack of 3)
HK$1,986.167
Better World
Siemens 5SV3 RCCB, 40A, 4 Pole, 30mA, Type A
  • RS Stock No. 124-7723
  • Mfr. Part No. 5SV3344-6KK12
Each
HK$813.40
Better World
Siemens SENTRON 3VA1 MCB, 3P, 125A
  • RS Stock No. 224-7796
  • Mfr. Part No. 3VA1112-1AA32-0AA0
Each
HK$2,342.10
SIBA 16A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 421-637
  • Mfr. Part No. 20-000-13/16E1
Each (In a Pack of 3)
HK$57.867
Littelfuse 1.1A Resettable Fuse, 6V dc
  • RS Stock No. 517-7262P
  • Mfr. Part No. MICROSMD110F-2
Each (Supplied on a Reel)
HK$2.465
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 40A, Fixed Mount
  • RS Stock No. 232-0245
  • Mfr. Part No. 1SDA067393R1 XT1C 160 TMD 40A FF
Each
HK$2,523.28
Eaton RCD, 25A, 2 Pole, 30mA, Type B, 230V
  • RS Stock No. 922-8746
  • Mfr. Part No. 236269 PKNM-25/1N/B/003-A-MW
Each
HK$954.00
Better World
Siemens Sentron 5SY4 MCB, 1+N, 2A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1401
  • Mfr. Part No. 5SY4502-7
Each
HK$705.00
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 300mA, Type B, 400V ac
  • RS Stock No. 211-9703
  • Mfr. Part No. 5SV3646-5
Each
HK$12,238.80
Eaton 200mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3012
  • Mfr. Part No. GMA-200-R
Each
HK$27.50
RS PRO 3.15A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 209-9377
Each (In a Pack of 10)
HK$13.38
Littelfuse Inline Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 787-4350P
  • Mfr. Part No. 277.6106.0002
Each (Supplied in a Bag)
HK$29.10
Littelfuse 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4375
  • Mfr. Part No. 0217001.MXP
Each (In a Pack of 10)
HK$2.94
Mersen 25A Rail Mount Fuse Holder for 8 x 31mm Fuse, 3P+N, 400V ac
  • RS Stock No. 189-5330
  • Mfr. Part No. H1062676 / CMC83N
Each
HK$214.10
Bourns 1.1A Resettable Fuse, 16V
  • RS Stock No. 647-8207
  • Mfr. Part No. MF-MSMF110/16-2
Each (In a Pack of 10)
HK$2.84
Schneider Electric RCBO, 16A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-647
  • Mfr. Part No. A9D67416
Each
HK$3,178.35
RS PRO 16A M Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 182-4018P
Each (Supplied in a Box)
HK$31.84
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