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

32 of 999+
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-9505
  • Mfr. Part No. C10N44V100
Each
HK$22,668.19
SIBA 440mA Ceramic Cartridge Fuse, 10 x 35mm
  • RS Stock No. 736-1428
  • Mfr. Part No. 50-210-06/0.44A
Each
HK$64.30
Siemens, SENTRON MCCB 3P 350A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 256-572
  • Mfr. Part No. 3VA5335-6EC31-0AA0
Each
HK$13,670.40
Better World
Schneider Electric RCBO, 32A Current Rating, 1P+N Poles, 10mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 790-9342
  • Mfr. Part No. A9D10832
Each
HK$1,800.75
Better World
Schneider Electric 32A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 219-9059
  • Mfr. Part No. DF2EA32
Each (In a Pack of 10)
HK$91.24
Better World
Schneider Electric iID RCCB, 25A, 4 Pole, 300mA
  • RS Stock No. 734-9352
  • Mfr. Part No. A9R14425
Each
HK$2,084.15
Better World
Schneider Electric Acti9 iID RCCB, 25A, 4 Pole, 30mA, 400V ac
  • RS Stock No. 218-3910
  • Mfr. Part No. A9Z61425
Each
HK$7,527.20
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 15A Current Rating
  • RS Stock No. 221-5612
  • Mfr. Part No. 3-128-218
Each
HK$156.50
ABB, Tmax MCCB 3P 400A, Fixed Mount
  • RS Stock No. 237-5967
  • Mfr. Part No. 1SDA054445R1 T5H400 FF TMA 400A
Each
HK$10,282.20
ABB RCBO, 40A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6943
  • Mfr. Part No. 2CSR255080R1405 DS201 B40 AC30
Each
HK$1,034.00
ABB Tmax XT Plate for use with Circuit Breaker
  • RS Stock No. 231-9372
  • Mfr. Part No. 1SDA105123R1 MIR-P x XT5 P/W 400A FP
1 Box of 1
HK$954.33
Bourns SMD Non Resettable Fuse 160mA, 125V ac
  • RS Stock No. 191-4577
  • Mfr. Part No. SF-2410FP016T-2
Each (On a Tape of 10)
HK$27.02
Schneider Electric Acti9 1 Phase Distribution Board, 27 Way, 125 A
  • RS Stock No. 339-683
  • Mfr. Part No. SEA9APN27
Each
HK$5,258.40
Better World
ABB System Pro M Compact S200 MCB, 2P, 16A Curve K, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7996
  • Mfr. Part No. 2CDS252001R0467 S202-K16
Each
HK$557.60
Littelfuse PCB Mount Fuse Holder for ATO Fuse, 80V dc
  • RS Stock No. 894-9600
  • Mfr. Part No. 178.6164.0002
Each
HK$23.20
Better World
Siemens, SENTRON Circuit breaker 4P 160A, DIN Rail Mount
  • RS Stock No. 224-7817
  • Mfr. Part No. 3VA1116-5GF42-0AA0
Each
HK$11,139.70
Socomec 16A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 122-5272
  • Mfr. Part No. 60220016
Each (In a Pack of 10)
HK$17.53
Schurter 4A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 712-4756
  • Mfr. Part No. 0090.0004
Each
HK$155.00
Littelfuse 3.15A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4426
  • Mfr. Part No. 02173.15MXP
Each (In a Pack of 10)
HK$2.82
Eaton Fuse Puller, Sizes 13/32 → 13/16in
  • RS Stock No. 849-5964
  • Mfr. Part No. FP-2
Each
HK$680.90
1
32
2364
Results per page

Related links