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

103 of 999+
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-3108
  • Mfr. Part No. 1SDA070961R1
Each
HK$55,059.09
Better World
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3305
  • Mfr. Part No. 1SDA071212R1
Each
HK$195,892.52
Better World
Schneider Electric Linergy Busbar, 690V, 54mm Pitch
  • RS Stock No. 608-8242
  • Mfr. Part No. GV2G454
Each
HK$178.30
ABB, Tmax MCCB 3P 320A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 237-5960
  • Mfr. Part No. 1SDA054316R1 T5N400 FF PR221-LS 320A
Each
HK$9,256.60
Eaton 1.6A T Nickel Plated Spring Brass (Terminal) Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 229-212
  • Mfr. Part No. FNQ-1-6/10
1 Pack of 10
HK$5,662.20
Schneider Electric Resi9 Resi9 XP CM MCB, 1P, 20A, 250V AC
  • RS Stock No. 287-6097
  • Mfr. Part No. R9PSC2
Each
HK$357.17
Better World
Siemens SENTRON 3VA1 MCB, 4P, 63A
  • RS Stock No. 224-7878
  • Mfr. Part No. 3VA1163-5GF42-0AA0
Each
HK$4,662.40
Mersen 20A FF Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0615
  • Mfr. Part No. E1014580 / FR10GR69V20
Each
HK$3,922.70
Better World
ABB System Pro M Compact S200M MCB, 1P, 2A Curve C, 253V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4100
  • Mfr. Part No. 2CDS271001R0024 S201M-C2
Each
HK$279.50
Schneider Electric MasterPact Connection Unit for use with MTZ1 06-16
  • RS Stock No. 212-114
  • Mfr. Part No. LV833732
Each
HK$2,778.32
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-554
  • Mfr. Part No. 3VA6210-5KL31-0AA0
Each
HK$18,983.50
Better World
Siemens Sentron 5SY4 MCB, 2P, 25A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1335
  • Mfr. Part No. 5SY4225-8
Each
HK$703.50
Eaton Eaton xEnergy Main Spacer for use with Busbar Support
  • RS Stock No. 256-653
  • Mfr. Part No. 292313 XBSB-S
1 Pack of 50
HK$1,387.30
Siemens 5SM26 RCCB, 63A, 3 Pole, 300mA, Type A, 400V
  • RS Stock No. 328-421
  • Mfr. Part No. 5SM2636-8
Each
HK$2,539.09
ABB RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 181-4373
  • Mfr. Part No. 2CSA255103R1164 DS-ARC1 C16 A30
Each
HK$2,687.98
ABB S301 MCB, 1P, 2A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-279
  • Mfr. Part No. 2CDS381001R0024
Each
HK$970.51
Eaton 16A Tag Fuse, 13 x 50mm, 500V
  • RS Stock No. 229-233
  • Mfr. Part No. 16D16 FUSE D1 16A 500 VAC T GL/GG E16
1 Pack of 10
HK$305.60
RS PRO 5A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 413-226
Each (In a Pack of 10)
HK$6.77
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
SIBA 1.6A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 736-1425
  • Mfr. Part No. 70-172-40/1.6A
Each
HK$35.60
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