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

130 of 999+
Temporarily out of stock
160A Tag Fuse, 100 x 195mm, 690V
  • RS Stock No. 262-625
  • Mfr. Part No. EBH00013TTS5
Each
HK$928.10
In Stock
Schneider Electric Acti 9 Spacer for use with C120/C60 Miniature Circuit Breakers, Clario/Librio/ProDis Circuit
  • RS Stock No. 776-2819
  • Mfr. Part No. A9N27062
Each
HK$24.20
Temporarily out of stock
SENTRON Wire Connector for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-524
  • Mfr. Part No. 3VA9373-0JJ24
1 Kit
HK$1,496.90
Temporarily out of stock
Schurter 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 866-4747
  • Mfr. Part No. 0031.3753
Each (In a Pack of 100)
HK$35.276
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - PR11 Single Pole Panel Mount, 5A Current Rating
  • RS Stock No. 275-0436
  • Mfr. Part No. PR11-62-5.00A-XX-V
1 Box of 10
HK$1,610.30
Temporarily out of stock
Eaton 25A Stud Mount 6.3 x 32mm Fuse Block, 250V ac
  • RS Stock No. 233-0595
  • Mfr. Part No. BK2-S-4201-1-R
Each (In a Pack of 10)
HK$8.98
Temporarily out of stock
Eaton 80A Cartridge Fuse, 76 x 442mm
  • RS Stock No. 254-754
  • Mfr. Part No. 24TFMEJ80
Each
HK$4,079.20
Temporarily out of stock
Hager BF RCD, 63A, 2 Pole, 300mA, Type A-HI, 500V
  • RS Stock No. 599-764
  • Mfr. Part No. BF267
Each
HK$4,955.70
Temporarily out of stock
Siemens SENTRON Option Plug
  • RS Stock No. 277-0904
  • Mfr. Part No. 3WA9111-0EB10
Each
HK$1,649.20
In Stock
Littelfuse Non-Resettable Wire Ended Fuse 2A, 125V ac/dc
  • RS Stock No. 738-3030
  • Mfr. Part No. 0251002.MRT1L
Each (In a Pack of 10)
HK$5.57
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 25 kA
  • RS Stock No. 209-6827
  • Mfr. Part No. 3VA1150-3EE42-0AA0
Each
HK$3,862.50
In Stock
Eaton 20A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-355
  • Mfr. Part No. AAO20
Each (In a Pack of 5)
HK$97.68
In Stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5187
  • Mfr. Part No. 3VA2216-5MN32-0AA0
Each
HK$8,174.90
In Stock
ABB System Pro M Compact S200 MCB, 1P, 3A, Type Z, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-257
  • Mfr. Part No. 2CDS251001R0318
Each
HK$744.34
Temporarily out of stock
Siemens 25A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2024
  • Mfr. Part No. 3NW1250-0HG
Each (In a Pack of 10)
HK$236.03
In Stock
Hager Hager NEN Circuit Breaker, 1P, 16A Curve B, 230 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 599-898
  • Mfr. Part No. NEN116
Each
HK$550.10
Temporarily out of stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)2, NZM2
  • RS Stock No. 243-479
  • Mfr. Part No. 100684 NZM2-XTVDV-NA
Each
HK$1,060.28
Temporarily out of stock
Eaton Eaton Moeller Series NZM Mounting Plate for use with N3, NS3, NZM3, NZM3-NA, PN3
  • RS Stock No. 230-417
  • Mfr. Part No. 119382 NZM3-XAP10
Each
HK$1,460.21
Temporarily out of stock
Eaton Mounting Plate
  • RS Stock No. 231-547
  • Mfr. Part No. 119381 NZM2-XAP7
Each
HK$1,283.50
In Stock
Bourns 0.05A Resettable Fuse, 220V
  • RS Stock No. 692-6771P
  • Mfr. Part No. CMF-RL50A-0
Each (Supplied in a Bag)
HK$3.94
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