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 Products showing for Fuses & Circuit Breakers

29 of 999+
Temporarily out of stock
ABB Cover for use with Four-Pole XT1
  • RS Stock No. 192-0931
  • Mfr. Part No. 1SDA066656R1
Each
HK$382.07
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-9433
  • Mfr. Part No. C10F3TM050
Each
HK$5,332.70
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 250 DC
  • RS Stock No. 260-7838
  • Mfr. Part No. C253TM200D
Each
HK$6,771.00
In Stock
RS PRO Fuse Holder DIN Rail Adapter
  • RS Stock No. 354-408
Each (In a Pack of 10)
HK$10.56
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 250-4238
  • Mfr. Part No. 1SDA054538R1
Each
HK$44,020.60
In Stock
Littelfuse 20A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 878-1580
  • Mfr. Part No. 0FLM020.T
Each
HK$114.20
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100/160
  • RS Stock No. 260-9360
  • Mfr. Part No. C103TM050
Each
HK$2,673.56
Temporarily out of stock
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
In Stock
Mersen 250mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6710
  • Mfr. Part No. H084302
Each (In a Pack of 10)
HK$31.429
Temporarily out of stock
ABB, Tmax XT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 236-7282
  • Mfr. Part No. 1SDA067413R1 XT1N 160 TMD 50A FF
Each
HK$2,505.10
In Stock
SIBA 160A White Automotive Car Fuse, 80V dc
  • RS Stock No. 161-1833
  • Mfr. Part No. 9005805.160
Each
HK$45.60
In Stock
Better World
Schneider Electric, ComPacT New Generation Circuit breaker 3P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 254-6286
  • Mfr. Part No. C10F3TM100
Each
HK$5,482.80
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - TCP 2A Single Pole 65 V dc, 250V ac Voltage Rating, 2A Current Rating
  • RS Stock No. 170-3786
  • Mfr. Part No. 0712217
Each (In a Box of 20)
HK$127.035
Limited stock
Limitor Thermal Fuse +150°C 5 A, 250V ac
  • RS Stock No. 124-5062
  • Mfr. Part No. A8-5AF
Each (In a Pack of 5)
HK$7.70
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4488
  • Mfr. Part No. 1SDA072699R1
Each
HK$70,469.78
Temporarily out of stock
ABB Tmax T Cover for use with Tmax T
  • RS Stock No. 232-0119
  • Mfr. Part No. 1SDA054968R1 LTC T5 F
Each
HK$386.61
Temporarily out of stock
ABB RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A
  • RS Stock No. 231-9949
  • Mfr. Part No. 2CSR255170R1324 DSH201 C32 A30
1 Box of 1
HK$743.28
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-7991
  • Mfr. Part No. C25R4TM250
Each
HK$29,434.33
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4291
  • Mfr. Part No. 1SDA072425R1
Each
HK$114,856.17
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7677
  • Mfr. Part No. C12B4TM160B
Each
HK$9,559.36
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