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

47290 Products showing for Fuses & Circuit Breakers

11 of 999+
Better World
ABB, Tmax XT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-6710
  • Mfr. Part No. 1SDA068356R1 XT4H 160 TMA 160A 3P+N FF
Each
HK$10,190.90(exc. GST)
Better World
Schneider Electric Multi 9 M9F4 MCB, 1P, 8A, Type Z, 415V AC, 60V DC, 20 kA, 3 kA Breaking Capacity
  • RS Stock No. 211-2676
  • Mfr. Part No. M9F44108
Each
HK$304.40(exc. GST)
Mersen 2A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 230-3569
  • Mfr. Part No. H214114
Each (In a Pack of 10)
HK$20.34(exc. GST)
Schneider Electric Acti9 3 Phase Distribution Board, 12 Way, 250 A
  • RS Stock No. 207-336
  • Mfr. Part No. SE36B250
Each
HK$4,911.83(exc. GST)
ABB Tmax T Shunt Opening Release for use with MCCB
  • RS Stock No. 232-0106
  • Mfr. Part No. 1SDA054870R1 SOR-C 24VAC/DC T4-6
Each
HK$982.80(exc. GST)
Wickmann 2A Resettable Fuse, 8V dc
  • RS Stock No. 174-0789
  • Mfr. Part No. 1812L200THPR
Each (In a Pack of 20)
HK$3.295(exc. GST)
Eaton 35A DIII Bottle Fuse, 500V
  • RS Stock No. 228-741
  • Mfr. Part No. 35D33 FUSE-D3 35A T GL/GG 500VAC E33
1 Pack of 5
HK$111.90(exc. GST)
Eaton, xEnergy MCCB 3P 250A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 537-5589
  • Mfr. Part No. 259124 NZMN2-VE250
Each
HK$9,626.30(exc. GST)
Eaton 5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7089
  • Mfr. Part No. MDA-5-R
Each
HK$70.90(exc. GST)
Better World
Schneider Electric, Compact MCCB 4P 80A, Breaking Capacity 50 kA, Clip-On
  • RS Stock No. 178-7760
  • Mfr. Part No. LV426476
Each
HK$5,104.61(exc. GST)
Schurter Thermal Magnetic Circuit Breaker - Single Pole 240 V ac, 32V dc Voltage Rating, 5A Current Rating
  • RS Stock No. 539-3701
  • Mfr. Part No. 4404.0007
Each
HK$27.10(exc. GST)
Eaton 63A Tag Fuse, 21 x 87mm, 500V, 74mm
  • RS Stock No. 228-653
  • Mfr. Part No. BAO63M100
1 Pack of 20
HK$6,986.90(exc. GST)
Eaton 4A Cartridge Fuse, 440 x 41.3mm
  • RS Stock No. 228-882
  • Mfr. Part No. 38CAV4E
1 Pack of 3
HK$9,240.00(exc. GST)
Better World
ABB, Tmax XT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-6678
  • Mfr. Part No. 1SDA068297R1 XT4L 160 BLOC FF
Each
HK$7,040.40(exc. GST)
Eaton 350A British Standard Fuse, FM, 690 V ac, 500V dc, 80 → 85mm
  • RS Stock No. 156-9112
  • Mfr. Part No. 350FM
Each
HK$1,138.70(exc. GST)
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 40A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 191-6100
  • Mfr. Part No. A9P22740
Each
HK$1,776.24(exc. GST)
Phoenix Contact TRABTECH Electronic Circuit breaker 3A 24V CB E1, On Base Element
  • RS Stock No. 768-1104
  • Mfr. Part No. 2800917
Each
HK$363.30(exc. GST)
Littelfuse 10A Inline Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 878-3882
  • Mfr. Part No. 01500274Z
Each (In a Pack of 10)
HK$17.17(exc. GST)
Eaton 6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3040
  • Mfr. Part No. GMA-6-R
Each
HK$23.50(exc. GST)
Littelfuse 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4375
  • Mfr. Part No. 0217001.MXP
Each (In a Pack of 10)
HK$2.94(exc. GST)
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