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

83 of 999+
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4PB 3 Pole 690V ac Voltage Rating, 115A Current Rating
  • RS Stock No. 209-5323
  • Mfr. Part No. GV4PB115N
Each
HK$5,172.00
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 2.5A, Fixed Mount
  • RS Stock No. 260-9423
  • Mfr. Part No. C10F3MA003
Each
HK$5,117.66
Temporarily out of stock
Schneider Electric 30A Fuse Holder, 3P, 600V ac
  • RS Stock No. 212-362
  • Mfr. Part No. DFCC3
1 Pack of 4
HK$2,694.80
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 347-088
  • Mfr. Part No. C10N47E100
Each
HK$42,335.21
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 100A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 207-151
  • Mfr. Part No. C11H44V100L
Each
HK$15,907.48
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 4P, 10A Curve K, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 202-977
  • Mfr. Part No. 2CDS274001R0427
Each
HK$3,939.32
Temporarily out of stock
ABB S800S MCB, 1P, 13A Curve D, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-863
  • Mfr. Part No. 2CCS861001R0131
Each
HK$1,609.90
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-3103
  • Mfr. Part No. 1SDA070956R1
Each
HK$59,307.16
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 6 kA, Fixed Mount
  • RS Stock No. 250-702
  • Mfr. Part No. 192366 NZMS3-PX250-BT
Each
HK$35,499.70
Temporarily out of stock
Eaton Electronic Circuit Breaker 8A 24V , 1 channels , DIN Rail
  • RS Stock No. 261-403
  • Mfr. Part No. PXS24E08A002 PXS24E-e8/F
Each
HK$395.80
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 50mA, 125V ac
  • RS Stock No. 738-3309
  • Mfr. Part No. 39600500000
Each (In a Pack of 10)
HK$14.60
In Stock
ABB RCBO, 63A Current Rating, 3P Poles, Type C
  • RS Stock No. 237-5073
  • Mfr. Part No. 2CSR253001R1634
Each
HK$3,320.24
In Stock
Rittal Polycarbonate Mounting Frame for Use with Interfaces And Sockets
  • RS Stock No. 230-4882
  • Mfr. Part No. 2482600
Each
HK$1,406.00
In Stock
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
In Stock
Littelfuse 250mA F Ceramic Cartridge Fuse, 3 x 8.4mm
  • RS Stock No. 738-3096P
  • Mfr. Part No. 0242.250UR
Each (Supplied on a Reel)
HK$42.70
Temporarily out of stock
Hager NGN MCB, 2P, 20A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4763
  • Mfr. Part No. NGN220
Each
HK$1,127.62
In Stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2736
  • Mfr. Part No. 2906810
Each
HK$1,223.10
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 4P, 20A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-003
  • Mfr. Part No. 2CDS274061R0487
Each
HK$6,003.36
In Stock
Europa EUC3P EUC MCB, 3P, 25A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6597
  • Mfr. Part No. EUC3P25C
Each
HK$151.30
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 150A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 432-913
  • Mfr. Part No. NJGF36150TW
Each
HK$27,296.90
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