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

47049 Products showing for Fuses & Circuit Breakers

2251 of 999+
Temporarily out of stock
Schneider Electric Vertical Busbar, Canalis Series
  • RS Stock No. 346-714
  • Mfr. Part No. KSA100EV4254
Each
HK$7,581.74
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 Flexible Busbar Trunking, 3mm, 400A, KSC40 Series
  • RS Stock No. 207-303
  • Mfr. Part No. KSC400ED4306
Each
HK$22,586.65
Temporarily out of stock
Siemens 24V ac Circuit Trip
  • RS Stock No. 223-7632
  • Mfr. Part No. 5TT4425-2
Each
HK$587.70
In Stock
Lovato 50A Fuse Holder for 14 x 51mm Fuse, 1P, 690V ac
  • RS Stock No. 248-5513
  • Mfr. Part No. FB02A1N
Each
HK$301.50
Temporarily out of stock
ABB S800S MCB, 2P, 16A Curve C, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-632
  • Mfr. Part No. 2CCS862001R0164
Each
HK$3,422.66
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 4P 10A, Fixed Mount
  • RS Stock No. 236-7527
  • Mfr. Part No. 1SDA067851R1 XT2S 160 Ekip LSIG 10A FF
Each
HK$14,845.59
Temporarily out of stock
Schneider Electric, PowerPact Circuit breaker 4P 45A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 357-061
  • Mfr. Part No. BDF46045
Each
HK$9,598.88
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 163A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-8114
  • Mfr. Part No. LV426179
Each
HK$4,636.90
In Stock
Siemens 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V ac
  • RS Stock No. 396-005
  • Mfr. Part No. 3NC1493
Each (In a Pack of 2)
HK$1,838.65
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 1P, 8A Curve C, 400V AC, 72V DC
  • RS Stock No. 212-8862
  • Mfr. Part No. 5SL6108-7
Each
HK$184.80
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 4P 400A, Fixed Mount
  • RS Stock No. 250-4200
  • Mfr. Part No. 1SDA054486R1
Each
HK$58,801.19
In Stock
Eaton 600mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 849-5746
  • Mfr. Part No. GMC-600-R
Each
HK$38.00
Temporarily out of stock
Eaton Eaton xEnergy Main Busbar Support for use with Busbar
  • RS Stock No. 229-656
  • Mfr. Part No. 110269 XBSB164-STS
Each
HK$2,018.25
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 8 Way, 63 A
  • RS Stock No. 117-021
  • Mfr. Part No. FP VN 0800 GB
Each
HK$8,794.25
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 80A, Breaking Capacity 7.5 kA, Fixed Mount
  • RS Stock No. 229-378
  • Mfr. Part No. 115453 NZMH1-M80
Each
HK$4,678.25
Temporarily out of stock
Eaton 160A Tag Fuse, 76 x 359mm, 3.6kV
  • RS Stock No. 258-860
  • Mfr. Part No. 3.6WFGHA160
1 Pack of 3
HK$22,435.50
Temporarily out of stock
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 1P, 40A Curve B, 240V AC, 10000 A Breaking Capacity
  • RS Stock No. 335-289
  • Mfr. Part No. SE10B140
Each
HK$284.12
In Stock
Littelfuse SMD Non Resettable Fuse 500mA, 63V
  • RS Stock No. 738-3289
  • Mfr. Part No. 0468.500NR
Each (In a Pack of 10)
HK$7.26
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 320A, Fixed Mount
  • RS Stock No. 260-8126
  • Mfr. Part No. C40N32M320
Each
HK$35,149.32
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