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

69 of 999+
Legrand DX Range DNX3 MCB, 10A Curve C, 4.5 kA Breaking Capacity
  • RS Stock No. 731-9443
  • Mfr. Part No. 4 067 73
Each
HK$135.00
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA
  • RS Stock No. 210-1613
  • Mfr. Part No. 3VA1110-5EE42-0AA0
Each
HK$5,380.50
TE Connectivity Thermal Magnetic Circuit Breakers - Potter & Brumfield W54 Single Pole 250V ac Voltage Rating Panel
  • RS Stock No. 240-8955
  • Mfr. Part No. 3-1393250-2
Each
HK$54.70
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7598
  • Mfr. Part No. C11F3TM100L
Each
HK$5,447.38
Better World
Schneider Electric 10A Cartridge Fuse, 8.5 x 32mm
  • RS Stock No. 219-9040
  • Mfr. Part No. DF2BN1000
Each (In a Pack of 10)
HK$65.00
Littelfuse 8A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4527
  • Mfr. Part No. 0218008.MXP
Each (In a Pack of 10)
HK$11.51
Eaton PC Board Non Resettable Fuse, Radial 1.25A, 300V ac
  • RS Stock No. 169-9518
  • Mfr. Part No. SR-5H-1-25A-BK
Each (In a Bag of 200)
HK$16.591
ABB RCBO, 10A Current Rating, 1P Poles, Type C
  • RS Stock No. 237-5245
  • Mfr. Part No. 2CSR275151R0104
Each
HK$1,405.04
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 729-2855
  • Mfr. Part No. 3600-P10-Si-10A
Each
HK$879.40
ETA Thermal Magnetic Circuit Breaker - 3400 Single Pole Panel Mount, 5A Current Rating
  • RS Stock No. 122-9296
  • Mfr. Part No. 3400-P10-H-SI-5A
Each
HK$578.10
Better World
ABB System Pro M Compact S200M MCB, 1P, 500mA Curve C, 253V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 231-9698
  • Mfr. Part No. 2CDS271001R0984 S201M C 0.5A - 15 KA
1 Box of 1
HK$199.50
RS PRO 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-380
Each (In a Pack of 10)
HK$3.26
ETA Thermal Circuit Breaker - 3120-N 5 Pole 50 V DC, 240 V AC Voltage Rating, 16A Current Rating
  • RS Stock No. 210-2086
  • Mfr. Part No. 3120-N551-H7T1-W02D-16A
Each
HK$207.70
ABB Tmax XT Connector Plug Socket for use with Circuit Breaker
  • RS Stock No. 232-0178
  • Mfr. Part No. 1SDA066414R1 DEBRO. FP 12BR. XT2-4
Each
HK$655.77
Europa EUC2P EUC MCB, 2P, 1A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6538
  • Mfr. Part No. EUC2P1C
Each
HK$226.50
Eaton AV/I44 Enclosure for use with AFDD, MCB, RCBO, RCD
  • RS Stock No. 240-983
  • Mfr. Part No. 059819 AV/I44-125
Each
HK$3,004.13
Eaton 70 → 100A Ferrule Fuse Block, 600V
  • RS Stock No. 182-1358
  • Mfr. Part No. JM60100-3CR
Each
HK$2,068.60
Selco Thermal Fuse +128°C 10 A, 250V ac
  • RS Stock No. 111-7805
  • Mfr. Part No. SWTC-262-3535
Each (In a Pack of 10)
HK$14.27
Littelfuse 125mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-2919
  • Mfr. Part No. 0218.125MXP
Each (In a Pack of 10)
HK$7.81
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2745
  • Mfr. Part No. 2906832
Each
HK$164.00
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