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

46 of 999+
In Stock
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 729-2855
  • Mfr. Part No. 3600-P10-Si-10A
Each
HK$879.40
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 2A Curve K, 440V AC, 20 kA Breaking Capacity
  • RS Stock No. 514-0181
  • Mfr. Part No. 2CDS253001R0277 S203-K2
Each
HK$972.40
In Stock
Eaton xEffect MCB, 2P, 63A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4728
  • Mfr. Part No. 239109 FAZ6-C63/2
Each
HK$598.10
Temporarily out of stock
Siemens SENTRON Assembly Kit for use with 3VA1 100/160
  • RS Stock No. 210-3512
  • Mfr. Part No. 3VA9113-0QA00
Each
HK$166.30
In Stock
Phoenix Contact Thermal Circuit Breaker - TCP 6A Single Pole 65 V dc, 250V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 801-6918
  • Mfr. Part No. 0712275
Each
HK$128.00
In Stock
Phoenix Contact Thermal Circuit Breaker - TCP 10A Single Pole 65 V dc, 250V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 801-6915
  • Mfr. Part No. 0712314
Each
HK$128.00
In Stock
Better World
ABB System Pro M Compact S200M MCB, 1P, 500mA Curve C, 253V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 231-9698
  • Mfr. Part No. 2CDS271001R0984 S201M C 0.5A - 15 KA
1 Box of 1
HK$199.50
Temporarily out of stock
Eaton 20A Yellow Automotive Car Fuse, 32V dc No
  • RS Stock No. 848-2567
  • Mfr. Part No. ATC-20
Each
HK$9.20
In Stock
Better World
Schneider Electric 10A Cartridge Fuse, 8.5 x 32mm
  • RS Stock No. 219-9040
  • Mfr. Part No. DF2BN1000
Each (In a Pack of 10)
HK$65.00
Temporarily out of stock
ABB Mounting Plate for use with Three-Pole XT1
  • RS Stock No. 192-0808
  • Mfr. Part No. 1SDA066652R1
Each
HK$733.74
In Stock
Siemens Sentron Undervoltage Release for use with 3VA1 Series Circuit Breaker
  • RS Stock No. 874-4521
  • Mfr. Part No. 3VA9908-0BB11
Each
HK$1,085.00
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 160 DC
  • RS Stock No. 260-7716
  • Mfr. Part No. C163TM125D
Each
HK$3,373.58
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX630 Circuit Breakers
  • RS Stock No. 260-8194
  • Mfr. Part No. C6346E630
Each
HK$46,477.48
In Stock
Eaton xPole MCB, 1+N, 6A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 230-1084
  • Mfr. Part No. 264743 PLG4-C6/1N
Each
HK$134.80
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-049
  • Mfr. Part No. KV 9354 M
Each
HK$2,903.31
In Stock
Better World
ABB Compact Home SH200 MCB, 1P, 10A Curve B, 440V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 539-8144
  • Mfr. Part No. 2CDS211001R0105 SH201-B10
Each
HK$83.20
In Stock
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 4A Current Rating
  • RS Stock No. 729-2849
  • Mfr. Part No. 3600-P10-Si-4A
Each
HK$796.50
In Stock
Siemens 250A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 210-6958
  • Mfr. Part No. 3NE1227-2
Each (In a Pack of 3)
HK$2,277.367
In Stock
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6935
  • Mfr. Part No. 2CSR255080R1165 DS201 B16 AC30
Each
HK$928.40
In Stock
RS PRO MCB, 2P, 16A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0160
Each
HK$188.70
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