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

47205 Products showing for Fuses & Circuit Breakers

2233 of 999+
Littelfuse 4A M Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 769-0111
  • Mfr. Part No. 0234004.MXP
Each (In a Pack of 25)
HK$5.788
ABB, T6N MCCB 4P 800A, Fixed Mount
  • RS Stock No. 237-5990
  • Mfr. Part No. 1SDA060215R1 T6N800 3P+N FF TMA 800A
Each
HK$27,097.90
Contactum MCB, 1P, 16A Curve C, 250V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9031
  • Mfr. Part No. CPB1016C
Each
HK$44.90
Schurter PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 284-5300
  • Mfr. Part No. 0034.6612
Each (In a Pack of 10)
HK$2.32
Better World
Schneider Electric Acti 9 iC60N MCB, 10A Curve C, 100 → 130V AC, 6 kA Breaking Capacity
  • RS Stock No. 734-9258
  • Mfr. Part No. A9F77610
Each
HK$752.83
Siemens 400V (Volts) Remote Switch Circuit Trip for use with Remote Control Switch
  • RS Stock No. 613-323
  • Mfr. Part No. 5TT4115-3
Each
HK$458.36
Eaton 50mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9446
  • Mfr. Part No. S506-50-R
1 Bag of 1000
HK$4,338.50
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA
  • RS Stock No. 209-7045
  • Mfr. Part No. 3VA2025-5HN42-0AA0
Each
HK$7,600.30
Schneider Electric, ComPacT MCCB 4P 25A, Breaking Capacity 8 kA, Fixed Mount
  • RS Stock No. 341-508
  • Mfr. Part No. C10F6TM025
Each
HK$9,336.51
Eaton 5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-611
  • Mfr. Part No. TDC11-5A
Each (In a Pack of 10)
HK$41.62
Eaton xEffect MCB, 3P, 16A Curve D, 240 → 415V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 847-3526
  • Mfr. Part No. 278896 FAZ-D16/3
Each
HK$762.00
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7648
  • Mfr. Part No. 5TT4455-0
Each
HK$627.80
Legrand DX3 for use with Circuit Breaker
  • RS Stock No. 266-1352
  • Mfr. Part No. 410474
Each
HK$3,005.01
Better World
Schneider Electric Compact Nsx, Easypact Cvs Cable Connector for use with 2 Cables 50 mm2 → 120 mm2
  • RS Stock No. 221-1146
  • Mfr. Part No. LV429218
Each
HK$1,416.40
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 100/160/250 Circuit Breakers
  • RS Stock No. 260-9377
  • Mfr. Part No. C1047E040
Each
HK$34,212.51
Eaton 100A gG/gL Cartridge Fuse, 21 x 95mm
  • RS Stock No. 228-910
  • Mfr. Part No. OSD100
1 Pack of 20
HK$7,720.70
Siemens 90 → 110V ac Shunt Trip Shunt trip for use with 3RV2 Series Circuit Breakers
  • RS Stock No. 706-1973
  • Mfr. Part No. 3RV2902-2DF0
Each
HK$708.30
RS PRO 20A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3649
Each (In a Pack of 5)
HK$74.526
Better World
Schneider Electric TeSys Deca Motor Protection Circuit Breaker - 3 Pole 690V Voltage Rating, 32A Current Rating
  • RS Stock No. 256-4177
  • Mfr. Part No. GV3P321
Each
HK$2,463.50
Littelfuse 80mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4268
  • Mfr. Part No. 0217.080MXP
Each (In a Pack of 10)
HK$8.03
1
2233
2361
Results per page

Related links