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

2279 of 999+
Temporarily out of stock
ABB Front Terminal for use with S6 800, T6 800
  • RS Stock No. 250-4496
  • Mfr. Part No. 1SDA013957R1
Each
HK$2,712.36
Temporarily out of stock
Mersen 32M63 Bolted Tag Fuse, A2, 250 V dc, 415V ac, 73mm
  • RS Stock No. 178-1024
  • Mfr. Part No. K226283 / BTIA42V32M63
Each (In a Pack of 10)
HK$42.70
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-4745
  • Mfr. Part No. 1SDA073025R1
Each
HK$108,647.41
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 3P 10A, Fixed Mount
  • RS Stock No. 236-7504
  • Mfr. Part No. 1SDA067810R1 XT2S 160 Ekip LSI 10A FF
Each
HK$10,315.94
Temporarily out of stock
Eaton 3A Cartridge Fuse, 142 x 25.4mm
  • RS Stock No. 228-751
  • Mfr. Part No. 5.5ABWNA3E
Each
HK$1,524.50
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9788
  • Mfr. Part No. 3VA1116-5FE46-0AA0
Each
HK$11,011.90
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7686
  • Mfr. Part No. C12E4TM160B
Each
HK$8,485.92
In Stock
RS PRO PC Board Non Resettable Fuse 3.15A, 250V ac
  • RS Stock No. 911-3552
Each (In a Pack of 10)
HK$1.93
Temporarily out of stock
Schneider Electric Kaedra Enclosure for use with Circuit Breaker
  • RS Stock No. 438-829
  • Mfr. Part No. KDR35165
Each
HK$3,569.33
Temporarily out of stock
Better World
ABB, XT2S MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-7484
  • Mfr. Part No. 1SDA067755R1 XT2S 160 TMG 63A FF
Each
HK$4,258.38
Temporarily out of stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 50A Current Rating
  • RS Stock No. 175-1549
  • Mfr. Part No. GV4PE50S6
Each
HK$9,509.70
In Stock
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 2P, 600V ac
  • RS Stock No. 144-1801
  • Mfr. Part No. 0031.9163
Each (In a Box of 25)
HK$118.58
In Stock
Schneider Electric Busbar Tap-Off Unit with Fuse Isolator, Canalis Series
  • RS Stock No. 130-929
  • Mfr. Part No. KSB20CG5
Each
HK$2,829.30
In Stock
TE Connectivity Thermal Circuit Breaker - W28 SP Pole 32 V dc, 250 V ac Voltage Rating Panel Mount, 15A Current Rating
  • RS Stock No. 170-9406
  • Mfr. Part No. W28-XQ1A-15
Each (In a Bag of 100)
HK$30.508
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3989
  • Mfr. Part No. 3VA2110-7JP36-0AA0
Each
HK$14,689.50
Temporarily out of stock
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4851
  • Mfr. Part No. 3VA2580-6HM42-0AA0
Each
HK$93,938.30
Temporarily out of stock
Siemens, SENTRON MCCB 3P 1kA, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4797
  • Mfr. Part No. 3VA2510-7JP32-0AA0
Each
HK$109,371.00
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4866
  • Mfr. Part No. 3VA2580-7KQ32-0AA0
Each
HK$94,106.10
Temporarily out of stock
Better World
Siemens 5SV3 RCCB, 63A, 2 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 211-9681
  • Mfr. Part No. 5SV3616-6KK01
Each
HK$2,043.90
Temporarily out of stock
Hager NRN MCB, 4P, 40A Curve C, 415V AC, 20 kA Breaking Capacity
  • RS Stock No. 597-950
  • Mfr. Part No. NRN440
Each
HK$3,905.40
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