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

5 of 999+
In Stock
Littelfuse 5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 787-4123
  • Mfr. Part No. 0297005.WXNV
Each (In a Pack of 10)
HK$1.63
In Stock
Eaton 13A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-605
  • Mfr. Part No. TDC180-13A
Each (In a Pack of 10)
HK$7.33
In Stock
Siemens 125A NH Fuse, NH0, 500V ac
  • RS Stock No. 397-442
  • Mfr. Part No. 3NA3032
Each (In a Pack of 3)
HK$143.533
In Stock
Wickmann 30A Black Bolt Down Car Fuse, 32V dc
  • RS Stock No. 174-0742
  • Mfr. Part No. 0498030.M
Each (In a Pack of 10)
HK$12.31
Temporarily out of stock
Eaton xEffect RCCB, 25A, 4 Pole, 30mA, Type B, 456V ac
  • RS Stock No. 262-727
  • Mfr. Part No. 306415 FRCdM-25/4/003-G/Bfq-400
Each
HK$8,961.80
Temporarily out of stock
Eaton MCCB 1P 100A, Breaking Capacity 80 kA, Fixed Mount
  • RS Stock No. 628-8060
  • Mfr. Part No. 259141 PN1-100
1 Box of 1
HK$2,867.00
In Stock
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 100mA Trip Sensitivity, Type A, Acti 9 Range
  • RS Stock No. 790-9317
  • Mfr. Part No. A9D12820
Each
HK$1,372.10
In Stock
Eaton 1.25A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7112
  • Mfr. Part No. MDL-1-1-4-R
Each
HK$22.80
Temporarily out of stock
Eaton 16A gG/gL Cartridge Fuse, 14 x 51mm
  • RS Stock No. 229-272
  • Mfr. Part No. C14G16
1 Pack of 10
HK$199.50
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 32A, Breaking Capacity 16 kA
  • RS Stock No. 209-6956
  • Mfr. Part No. 3VA1032-2ED32-0AA0
Each
HK$2,566.30
Temporarily out of stock
Eaton 10A Tag Fuse, 550V ac
  • RS Stock No. 228-808
  • Mfr. Part No. NITD10 10A 550V AC BS88 FUSE
1 Pack of 20
HK$1,608.70
Temporarily out of stock
Siemens RCBO, 40A Current Rating, 4P Poles, 300mA Trip Sensitivity, Type AC, Sentron Range
  • RS Stock No. 196-3604
  • Mfr. Part No. 5SM26420
Each
HK$610.00
In Stock
Eaton 6A British Standard Fuse, E1, 240V ac
  • RS Stock No. 418-710
  • Mfr. Part No. SSD6
Each (In a Pack of 5)
HK$199.82
In Stock
Better World
Schneider Electric Surge Protector, 200A, <3.9kV, DIN Rail Mount
  • RS Stock No. 219-8276
  • Mfr. Part No. A9L40281
Each
HK$1,337.50
Limited stock
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)
HK$634.10
In Stock
Better World
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti 9 Range
  • RS Stock No. 790-9291
  • Mfr. Part No. A9D19816
Each
HK$1,518.90
In Stock
Littelfuse 440mA F Ceramic Cartridge Fuse, 10 x 35mm
  • RS Stock No. 738-3194
  • Mfr. Part No. 0FLU.440T
Each
HK$284.40
Temporarily out of stock
Better World
Schneider Electric iID RCCB, 80A, 4 Pole, 30mA, Type B-SI, 400V ac
  • RS Stock No. 248-3721
  • Mfr. Part No. A9Z61480
Each
HK$25,117.30
Limited stock
Eaton 20A Rail Mount Fuse Holder for A1 Fuse, 1P, 690V ac
  • RS Stock No. 221-601
  • Mfr. Part No. RS20P/G/WHI
Each
HK$488.20
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 6A Curve B, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2330
  • Mfr. Part No. M9F21106
Each
HK$171.80
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