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

54 of 999+
Rittal SZ Busbar
  • RS Stock No. 230-4854
  • Mfr. Part No. 2364000
Each
HK$1,205.20
Legrand 1A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6106
  • Mfr. Part No. 0 130 01
Each (In a Box of 10)
HK$22.70
RS PRO Earthing Strap Copper 75 x 13mm Diameter
  • RS Stock No. 264-9219
Each (In a Pack of 5)
HK$28.28
Siemens 125A NH Fuse, NH00, 500V ac
  • RS Stock No. 396-118
  • Mfr. Part No. 3NA3832
Each (In a Pack of 3)
HK$174.933
Eaton PC Board Non Resettable Fuse, Radial 1.25A, 300V ac
  • RS Stock No. 169-9518
  • Mfr. Part No. SR-5H-1-25A-BK
Each (In a Bag of 200)
HK$16.591
RS PRO 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-621
Each (In a Pack of 10)
HK$2.48
ABB System Pro M Compact S200 M UC MCB, 2P, 16A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-019
  • Mfr. Part No. 2CDS272061R0467
Each
HK$1,955.29
RS PRO 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-463
Each (In a Pack of 10)
HK$3.31
Siemens SENTRON Communication Module for use with 3VA2 400/630/1000
  • RS Stock No. 210-9384
  • Mfr. Part No. 3VA9387-0TB50
Each
HK$788.80
Better World
ABB S200C MCB, 2P, 20A Curve C, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1613
  • Mfr. Part No. 2CDS251281R0204
Each
HK$436.30
Better World
Schneider Electric Acti9 iID RCCB, 40A, 4 Pole, 30mA, 400V
  • RS Stock No. 218-3909
  • Mfr. Part No. A9Z51440
Each
HK$7,372.70
Socomec 2A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 122-5262
  • Mfr. Part No. 60120002
Each (In a Pack of 10)
HK$10.23
ABB AC Switch Disconnectors Accessories Interlock for use with Switch Fuses
  • RS Stock No. 259-9733
  • Mfr. Part No. 1SCA106542R1001
Each
HK$1,823.69
Littelfuse SMD Non Resettable Fuse 8A, 125V
  • RS Stock No. 738-2873
  • Mfr. Part No. 0154008.DR
Each (In a Pack of 10)
HK$16.84
Littelfuse 0.5A Resettable Fuse, 15V dc
  • RS Stock No. 787-4218
  • Mfr. Part No. 1812L050PR
Each (In a Pack of 10)
HK$2.34
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 6A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3332
  • Mfr. Part No. A9F54206
Each
HK$630.70
Panasonic SMD Non Resettable Fuse 5A, 32V dc
  • RS Stock No. 759-4795
  • Mfr. Part No. ERBRE5R00V
Each (In a Pack of 10)
HK$1.76
Better World
Schneider Electric Acti 9 4 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2746
  • Mfr. Part No. A9XPH457
Each
HK$1,422.50
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 150A, Fixed Mount
  • RS Stock No. 231-9325
  • Mfr. Part No. 1SDA075115R1 XT3N 225 TMF 150-1500 3p F
Each
HK$6,132.50
Wickmann 2.6A Resettable Fuse, 12V dc
  • RS Stock No. 174-0398
  • Mfr. Part No. RF1183-000
1 Reel of 7500
HK$20,539.30
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