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

96 of 999+
In Stock
HENSEL 1, 3 Phase Distribution Board, 24 Way, 63 A
  • RS Stock No. 183-2860
  • Mfr. Part No. KV9224M
Each
HK$1,357.40
In Stock
Bourns 2.6A Resettable Fuse, 6V
  • RS Stock No. 245-9156P
  • Mfr. Part No. MF-LSMF260/6X-2
Each (Supplied on a Reel)
HK$3.00
Temporarily out of stock
Better World
Siemens 3VA9 RCD, 250A, 3 Pole, Type A
  • RS Stock No. 210-3528
  • Mfr. Part No. 3VA9223-0RL30
Each
HK$9,101.60
Temporarily out of stock
Hager RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 602-221
  • Mfr. Part No. ADC833F
Each
HK$2,410.10
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8219
  • Mfr. Part No. C63L3
Each
HK$43,290.43
Temporarily out of stock
Eaton 32A Cartridge Fuses, 14 x 51mm
  • RS Stock No. 261-445
  • Mfr. Part No. C14M32S
1 Pack of 10
HK$918.70
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA1
  • RS Stock No. 269-7070
  • Mfr. Part No. 3VA9114-0JG10
Each (In a Pack of 4)
HK$78.825
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9648
  • Mfr. Part No. 3VA11103GD420AA0
Each
HK$4,971.20
In Stock
Legrand HX Cover for use with Single Pole/Single Pole + Neutral Supply Bus Bar
  • RS Stock No. 823-4686
  • Mfr. Part No. 4 049 89
Each
HK$9.00
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 32A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-828
  • Mfr. Part No. 2CDS271061R0537
Each
HK$1,184.21
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-582
  • Mfr. Part No. KV 3654 M
Each
HK$2,058.70
Temporarily out of stock
SENTRON Terminal Cover for use with 3VA63/64 Series
  • RS Stock No. 263-815
  • Mfr. Part No. 3VA9343-0KB01
Each
HK$1,164.80
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3358
  • Mfr. Part No. 1SDA071273R1
Each
HK$375,283.55
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-024
  • Mfr. Part No. 3VA6560-7HN32-2AA0
Each
HK$39,425.70
Temporarily out of stock
Hager MMN MCB, 2P, 16A, 400V AC, 20 kA Breaking Capacity
  • RS Stock No. 602-262
  • Mfr. Part No. MMN216
Each
HK$2,862.80
Temporarily out of stock
Schurter 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 600V ac
  • RS Stock No. 712-4796P
  • Mfr. Part No. 0091.0002
Each (Supplied in a Box)
HK$244.00
In Stock
Schneider Electric Acti9 A9F MCB, 3P, 1.6A, Type Z, 500V AC, 180V DC, 440 V Breaking Capacity
  • RS Stock No. 577-183
  • Mfr. Part No. A9F92372
1 Pack of 4
HK$9,935.40
In Stock
Better World
Schneider Electric, PowerLogic, 2kA, Energy Sensor, 3VA, Wired
  • RS Stock No. 256-4054
  • Mfr. Part No. A9MEM1593
Each
HK$15,127.13
In Stock
Mersen 35A DIII Diazed Fuse, E33 Thread Size, gG, 500V
  • RS Stock No. 377-0500
  • Mfr. Part No. C214063
Each (In a Pack of 5)
HK$15.58
In Stock
Siemens SIRIUS Rotary Operator for use with Circuit Breaker
  • RS Stock No. 271-0877
  • Mfr. Part No. 3RV2926-1K
Each
HK$520.90
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