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

203 of 999+
Limited stock
Better World
Siemens Sentron 5SY6 MCB, 1P, 10A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 489-6704
  • Mfr. Part No. 5SY6110-6
Each
HK$121.70
Temporarily out of stock
Eaton 125A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1511
  • Mfr. Part No. XS125
Each (In a Box of 10)
HK$638.083
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 50A, Fixed Mount
  • RS Stock No. 260-7576
  • Mfr. Part No. C11E4TM050L
Each
HK$4,768.31
In Stock
Eaton 50A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 182-1737
  • Mfr. Part No. 170M1564D
Each
HK$1,819.20
Last RS stock
Eaton xPole MCB, 3P, 20A Curve C, 400V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4406
  • Mfr. Part No. 242475 PLSM-C20/3-MW
Each
HK$810.50
In Stock
Eaton xEffect MCB, 3P, 10A Curve D, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3481
  • Mfr. Part No. 278892 FAZ-D10/3
Each
HK$792.10
In Stock
Better World
Schneider Electric Multi 9 C60BP MCB, 2P, 5A Curve C, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2417
  • Mfr. Part No. M9F42205
Each
HK$1,623.30
In Stock
Eaton 75A Bolted Tag Fuse, 500 V dc, 690V ac, 70mm
  • RS Stock No. 182-1653
  • Mfr. Part No. 75EET
Each
HK$453.50
Temporarily out of stock
SENTRON Terminal Cover for use with 3VA51 Series
  • RS Stock No. 263-953
  • Mfr. Part No. 3VA9131-0WD31
Each
HK$353.40
Temporarily out of stock
ABB 35A Tag Fuse, 150 x 40 x 72mm, 500V
  • RS Stock No. 251-3469
  • Mfr. Part No. 1SCA022627R4810
1 Box of 3
HK$631.20
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 16A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3747
  • Mfr. Part No. 3VA1196-5EF32-0AA0
Each
HK$3,740.90
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 131-428
  • Mfr. Part No. 2906002
Each
HK$1,623.85
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3779
  • Mfr. Part No. 3VA2116-6KP46-0AA0
Each
HK$23,754.00
In Stock
Littelfuse 125A Pink BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6753
  • Mfr. Part No. 153.5631.6121
Each (In a Pack of 5)
HK$30.22
In Stock
Eaton 11A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 459-7924
  • Mfr. Part No. DMM-B-11A
Each (In a Pack of 5)
HK$691.74
Temporarily out of stock
Eaton 250A Tag Fuse, 185 x 270mm, 690V
  • RS Stock No. 263-174
  • Mfr. Part No. EBH1O3TMV
Each
HK$1,998.40
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-7994
  • Mfr. Part No. C25S4
Each
HK$21,273.13
In Stock
RS PRO 3 Phase Industrial Surge Protector, 140kA, 2.5kV, DIN Rail Mount
  • RS Stock No. 101-770
Each
HK$7,003.99
In Stock
Eaton xEffect MCB, 1P, 20A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4598
  • Mfr. Part No. 239038 FAZ6-C20/1
Each
HK$176.90
In Stock
Eaton FAZ-DC MCB, 2P, 4A
  • RS Stock No. 221-3495
  • Mfr. Part No. 279136 FAZ-C4/2-DC
Each
HK$1,262.80
1
203
2364
Results per page

Related links