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

160 of 999+
Temporarily out of stock
Hager BTC Electronic Circuit breaker, 125A, 2 Pole, 1 A, 300 mA, 500 mA, Type AC, 500V
  • RS Stock No. 599-859
  • Mfr. Part No. BTC280E
Each
HK$6,035.00
Currently unavailable
Schneider Electric EasyPact Electronic Circuit Breaker 32A, Fixed
  • RS Stock No. 122-536
  • Mfr. Part No. LV510722
Each
HK$3,759.00
In Stock
Littelfuse 1.5A Resettable Fuse, 6V dc
  • RS Stock No. 624-3130
  • Mfr. Part No. NANOSMDC150F-2
Each (In a Pack of 10)
HK$2.69
In Stock
Littelfuse 0.75A Resettable Fuse, 72V
  • RS Stock No. 517-6663P
  • Mfr. Part No. RXEF075
Each (Supplied in a Bag)
HK$2.61
In Stock
Mersen 25A Rail Mount Fuse Holder for 8 x 31mm Fuse, 3P, 400V ac
  • RS Stock No. 189-5329
  • Mfr. Part No. M1062680 / CMC83
Each
HK$188.92
Currently unavailable
Schneider Electric EasyPact Electronic Circuit Breaker 63A, Fixed
  • RS Stock No. 122-521
  • Mfr. Part No. LV510685
Each
HK$2,358.23
In Stock
ABB RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity
  • RS Stock No. 231-9921
  • Mfr. Part No. 2CSR255080R1064 DS201 C6 AC30
1 Box of 1
HK$1,443.00
Temporarily out of stock
Siemens 3 Phase Surge Protector, 75kA, DIN Rail Mount
  • RS Stock No. 211-0180
  • Mfr. Part No. 5SD7413-1
Each
HK$11,963.30
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 4A Curve C, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7652
  • Mfr. Part No. 2CDS251001R0044 S201-C4
Each
HK$166.20
Temporarily out of stock
ABB S301 MCB, 1+N, 4A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-677
  • Mfr. Part No. 2CDS381103R0337
Each
HK$2,216.95
Temporarily out of stock
Siemens 20A Diazed Fuse, gG, 500/400V ac/dc
  • RS Stock No. 167-678
  • Mfr. Part No. 5SA2711
1 Pack of 10
HK$254.20
Temporarily out of stock
Hager CDC RCD Switch, 25A, 2 Pole, 25mA, Type AC, 230V
  • RS Stock No. 599-827
  • Mfr. Part No. CDC125F
Each
HK$1,652.60
Temporarily out of stock
25A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 262-388
  • Mfr. Part No. 36TDQSJ25
Each
HK$3,183.00
Temporarily out of stock
Hager BF RCD, 40A, 3 Pole, 300mA, Type A-HI, 500V
  • RS Stock No. 599-766
  • Mfr. Part No. BF340
Each
HK$4,329.10
Temporarily out of stock
Eaton xEffect RCCB, 80A, 2 Pole, 300mA, Type F, 240V ac
  • RS Stock No. 242-940
  • Mfr. Part No. 187381 FRCMM-80/2/03-G/F
Each
HK$6,370.00
Temporarily out of stock
Hager BFH RCCB, 63A, 4 Pole, 300mA
  • RS Stock No. 602-076
  • Mfr. Part No. BFH863
Each
HK$5,721.20
Temporarily out of stock
Hager BFF RCCB, 25A, 3P+N Pole, 300mA, Type F
  • RS Stock No. 602-065
  • Mfr. Part No. BFF425F
Each
HK$4,243.30
Temporarily out of stock
Better World
Siemens, 3VA1 MCCB 3P 96A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-3329
  • Mfr. Part No. 3VA1120-5ED32-0AA0
Each
HK$2,044.80
In Stock
Eaton 25A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4380
  • Mfr. Part No. LP-CC-25
Each
HK$600.70
In Stock
RS PRO 2.5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9787
Each (In a Pack of 10)
HK$4.46
1
160
2364
Results per page

Related links