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

2275 of 999+
In Stock
Phoenix Contact 4A T Cartridge Fuse, 5 x 20mm
  • RS Stock No. 129-484
  • Mfr. Part No. 1205749
Each
HK$95.00
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 2A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-028
  • Mfr. Part No. 2CDS271061R0277
Each
HK$1,161.85
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-202
  • Mfr. Part No. 3VA5320-7GC41-2AA0
Each
HK$26,334.00
Temporarily out of stock
Siemens SENTRON 5SJ MCB, 1P, 20A
  • RS Stock No. 232-2237
  • Mfr. Part No. 5SJ4120-7HG40
Each
HK$436.50
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 250-186
  • Mfr. Part No. 3VA6580-5JT46-2AA0
Each
HK$80,358.00
Temporarily out of stock
Schneider Electric PowerPacT H Lug Connector for use with Circuit Breaker
  • RS Stock No. 438-778
  • Mfr. Part No. S37423
Each
HK$709.46
In Stock
Littelfuse 0.2A Resettable Fuse, 30V dc
  • RS Stock No. 787-4192
  • Mfr. Part No. 1210L020WR
Each (In a Pack of 10)
HK$2.10
Temporarily out of stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4L 3 Pole 690V ac Voltage Rating, 50A Current Rating
  • RS Stock No. 175-1444
  • Mfr. Part No. GV4L50N6
Each
HK$4,768.98
Temporarily out of stock
Eaton xEffect - FRCmM RCCB, 80A, 4 Pole, 500mA, Type A, 240/415V ac
  • RS Stock No. 123-259
  • Mfr. Part No. 170350 FRCMM-80/4/05-A
Each
HK$3,701.26
Temporarily out of stock
ABB SU200 M MCB, 4P, 6A Curve C, 480V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-841
  • Mfr. Part No. 2CDS274337R0064
Each
HK$4,009.16
In Stock
Mersen 2A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-6956
  • Mfr. Part No. D213098
Each (In a Pack of 10)
HK$14.63
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3679
  • Mfr. Part No. 3VA2025-7JP42-0AA0
Each
HK$31,033.30
In Stock
RS PRO SMD Non-Resettable Surface Mount Fuse 1.5A, 63V
  • RS Stock No. 252-2141
Each (On a Tape of 4000)
HK$1.273
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9759
  • Mfr. Part No. 3VA1116-3FF46-0AA0
Each
HK$9,796.20
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-436
  • Mfr. Part No. 3VA6325-7KT41-0AA0
Each
HK$40,681.30
Temporarily out of stock
Socomec 25A Tag Fuse, 14 X 51mm, 690V, 51mm
  • RS Stock No. 252-5312
  • Mfr. Part No. 170N1425
Each (In a Pack of 10)
HK$120.079
In Stock
Panasonic SMD Non Resettable Fuse 2A, 32V dc
  • RS Stock No. 759-4751P
  • Mfr. Part No. ERBRD2R00X
Each (Supplied on a Reel)
HK$1.62
In Stock
Bourns 1.1A Resettable Fuse, 30V
  • RS Stock No. 647-8033P
  • Mfr. Part No. MF-SM100-2
Each (Supplied on a Reel)
HK$2.49
Temporarily out of stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV3P 3 Pole 690V Voltage Rating, 50A Current Rating
  • RS Stock No. 211-2529
  • Mfr. Part No. GV3P506
Each
HK$2,858.10
Temporarily out of stock
ABB SU200 M MCB, 4P, 2A Curve C, 480V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-112
  • Mfr. Part No. 2CDS274337R0024
Each
HK$4,009.16
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