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

165 of 999+
In Stock
Schurter 5 x 20mm Fuse Block
  • RS Stock No. 173-7806
  • Mfr. Part No. 4301.1405
Each (In a Box of 50)
HK$20.128
In Stock
Eaton 400A Panel Mount 00, 000 Fuse Block, 1kV
  • RS Stock No. 851-1943
  • Mfr. Part No. 170H1007
Each
HK$1,254.60
Temporarily out of stock
Eaton 1A T Melamine Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 261-916
  • Mfr. Part No. LP-CC-1
1 Pack of 10
HK$5,552.50
In Stock
Littelfuse 1.25A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4397
  • Mfr. Part No. 02171.25MXP
Each (In a Pack of 10)
HK$2.31
In Stock
Bourns Surface Mount Fuse 3A, 65V dc
  • RS Stock No. 245-9258P
  • Mfr. Part No. SF-1206SA300M-2
Each (Supplied on a Reel)
HK$7.08
Temporarily out of stock
SENTRON Terminal Cover for use with 3VA52, 3VA61/62 Series
  • RS Stock No. 263-928
  • Mfr. Part No. 3VA9271-0WF31
Each
HK$361.90
Temporarily out of stock
Hager 16A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 250-8624
  • Mfr. Part No. LF416G
Each (In a Pack of 10)
HK$66.972
Temporarily out of stock
Schneider Electric Acti9 iC60H MCB, 4P, 2A Curve C, 415V AC, 250V DC, 70 kA Breaking Capacity
  • RS Stock No. 654-796
  • Mfr. Part No. A9F53402
Each
HK$2,540.70
Temporarily out of stock
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-662
  • Mfr. Part No. 3VA5210-7GD41-0AA0
Each
HK$15,956.90
In Stock
Schurter Non-Resettable Fuse Kit
  • RS Stock No. 122-3333
  • Mfr. Part No. 0034.9857
Each
HK$1,107.60
In Stock
Siemens Sirius Innovation Link Module for use with 3RV1 Series
  • RS Stock No. 218-848
  • Mfr. Part No. 3RA1911-1A
1 Box of 10
HK$1,856.60
Temporarily out of stock
Siemens SENTRON Connection Unit for use with 3VA15/25 1000
  • RS Stock No. 269-7227
  • Mfr. Part No. 3VA9603-0QC00
Each (In a Pack of 3)
HK$1,025.633
Temporarily out of stock
Littelfuse Blade Fuse Kit
  • RS Stock No. 820-7278
  • Mfr. Part No. 00940509ZXGLOA
Each
HK$1,452.90
Temporarily out of stock
Siemens SENTRON 3VA9 Wire Connector for use with 3VA1 250
  • RS Stock No. 218-1815
  • Mfr. Part No. 3VA9213-0QE00
Each
HK$745.10
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 3P, 3A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-195
  • Mfr. Part No. 2CDS273061R0318
Each
HK$5,133.14
Temporarily out of stock
Hager Hager NKN Circuit Breaker, 2P, 50A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 599-912
  • Mfr. Part No. NKN250
Each
HK$2,144.80
In Stock
Eaton 4A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 228-662
  • Mfr. Part No. C10G4
1 Pack of 10
HK$98.00
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 20 Way, 250 A
  • RS Stock No. 339-836
  • Mfr. Part No. SEB48S12250
Each
HK$44,368.21
Temporarily out of stock
Better World
Schneider Electric Linergy Busbar, 690V, 60mm Pitch
  • RS Stock No. 211-2321
  • Mfr. Part No. LA9ZX01508
Each (In a Pack of 10)
HK$458.976
Stock information currently inaccessible
Mersen 30A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0522
  • Mfr. Part No. G1014582 / FR10GR69V30
Each (In a Box of 10)
HK$84.16
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