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

35 of 999+
Better World
Siemens RCBO, 13A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type A, SENTRON Range
  • RS Stock No. 187-3282
  • Mfr. Part No. 5SV1316-6KK13
Each
HK$550.60
SIBA 250mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3217
  • Mfr. Part No. 70-007-33/0.25A
Each (In a Pack of 10)
HK$6.16
Eaton 2A F Glass Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 849-5529
  • Mfr. Part No. AGX-2
Each
HK$22.70
Bourns Non Resettable Fuse 375mA, 125V ac
  • RS Stock No. 191-4605
  • Mfr. Part No. SF-2410FP0375T-2
Each (On a Tape of 10)
HK$11.86
ABB 16 Way Steel Consumer Unit, 100A, IP30 Housemaster
  • RS Stock No. 453-996
  • Mfr. Part No. 1SKB118142C6001
Each
HK$2,425.80
Phoenix Contact Thermal Circuit Breaker - TCP 3A Single Pole 65 V dc, 250V ac Voltage Rating, 3A Current Rating
  • RS Stock No. 801-6905
  • Mfr. Part No. 0712233
Each
HK$121.40
RS PRO Rail Mount Fuse Holder
  • RS Stock No. 501-871
Each
HK$130.60
Better World
Schneider Electric
  • RS Stock No. 125-1383
  • Mfr. Part No. A9C70122
Each
HK$2,541.30
Wickmann Panel Mount Fuse Holder
  • RS Stock No. 174-0754
  • Mfr. Part No. 03453LF8H
Each (In a Pack of 5)
HK$35.14
Eaton 32A British Standard Fuse, A2, 660V ac, 73mm
  • RS Stock No. 415-187
  • Mfr. Part No. TIA32M35
Each (In a Pack of 5)
HK$119.66
Eaton Circuit Breaker - NZM..-ME..NA 3 Pole 690V ac Voltage Rating, 200A Current Rating
  • RS Stock No. 250-9705
  • Mfr. Part No. 118966 NZMN2-ME200-NA
Each
HK$21,885.00
Schneider Electric, PowerPact MCCB 3P 400A, Breaking Capacity 25 kA, Flush Mount
  • RS Stock No. 354-527
  • Mfr. Part No. NLLF36000S40XTW
Each
HK$14,401.60
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-3418
  • Mfr. Part No. 1SDA071352R1
Each
HK$58,528.42
Eaton 20A Rail Mount Fuse Holder, 1P, 460 V dc, 660 → 690V ac
  • RS Stock No. 182-1406
  • Mfr. Part No. RS20F
Each (In a Box of 10)
HK$1,222.82
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 15A Current Rating
  • RS Stock No. 273-0882
  • Mfr. Part No. 1658-G21-02-P10-15A
Each
HK$42.80
Schurter 16A PCB Mount Fuse Holder for 5 x 20mm Fuse, 500V ac
  • RS Stock No. 173-7978
  • Mfr. Part No. 0031.2510
Each (In a Box of 25)
HK$123.988
WAGO Electronic Circuit Breaker 10A 24V 787, 4 channels , DIN Rail
  • RS Stock No. 279-4097
  • Mfr. Part No. 787-1664
Each
HK$1,778.70
Mersen 1A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2821
  • Mfr. Part No. L1014563
1 Box of 10
HK$793.50
Better World
Siemens SENTRON 3VA9 Wire Connector for use with 3VA1 250
  • RS Stock No. 218-1828
  • Mfr. Part No. 3VA9253-0JB12
Each
HK$388.20
Schurter 6.3A Inline Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 866-2671
  • Mfr. Part No. 0031.3501
Each (In a Pack of 100)
HK$40.123
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