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

219 of 999+
In Stock
Europa EUC1P EUC MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6490
  • Mfr. Part No. EUC1P4C
Each
HK$67.30
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 25A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-327
  • Mfr. Part No. 3VA5125-6ED11-0AA0
Each
HK$1,200.00
Temporarily out of stock
Legrand 96 Way Split Load Metal Consumer Unit, 160A, IP30 XL160
  • RS Stock No. 705-5583
  • Mfr. Part No. 0 200 04
Each
HK$8,859.18
In Stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX250 Circuit Breakers
  • RS Stock No. 260-7842
  • Mfr. Part No. C2542D250
Each
HK$13,118.60
Limited stock
Eaton 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 852-6941
  • Mfr. Part No. HTB-44I-R
Each
HK$91.60
Currently unavailable
Phoenix Contact Thermal Circuit Breaker - TCP 10/DC32V Single Pole 32V dc Voltage Rating On Base Element, 10A Current
  • RS Stock No. 652-3436
  • Mfr. Part No. 0700010
Each (In a Pack of 5)
HK$97.96
Temporarily out of stock
Phoenix Contact 2 Phase Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 201-5575
  • Mfr. Part No. 2906821
Each
HK$1,018.70
In Stock
Littelfuse 500A Base Mount Fuse Holder for Mega Fuse, 1P, 32V dc
  • RS Stock No. 787-4378
  • Mfr. Part No. 02981001ZXT
Each
HK$137.70
In Stock
Schurter 10A Panel Mount Fuse Holder for 6.3 x 32, 5 x 20mm Fuse, 1P, 500V ac
  • RS Stock No. 866-3429
  • Mfr. Part No. 0031.1631
Each
HK$48.10
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-295
  • Mfr. Part No. 3VA6440-6HL31-2AA0
Each
HK$24,433.40
In Stock
Sato Parts 10A Rail Mount Fuse Holder for 6.3 x 32 mm, 6.35 x 30 x 6.35 x 31.8 mm Fuse, 1P, 250V
  • RS Stock No. 229-4966
  • Mfr. Part No. F-700-AL
Each
HK$77.30
Stock information currently inaccessible
Schurter CBE Thermal Circuit Breaker - T11-311 Single Pole 240V ac Voltage Rating, 12A Current Rating
  • RS Stock No. 269-3821
  • Mfr. Part No. 4400.0279
Each
HK$84.50
In Stock
Eaton 32A Rail Mount Fuse Holder for A2 Fuse, 1P, 690V ac
  • RS Stock No. 413-917
  • Mfr. Part No. RS32H
Each
HK$923.10
In Stock
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 2P, 600V ac
  • RS Stock No. 144-1838
  • Mfr. Part No. 0031.9163
Each
HK$139.70
In Stock
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, System Pro M Compact Range
  • RS Stock No. 201-6953
  • Mfr. Part No. 2CSR255180R1164 DS201 C16 A30
Each
HK$1,350.60
In Stock
Eaton 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 233-0585
  • Mfr. Part No. BK2-HTC-607M
Each (In a Pack of 10)
HK$12.97
In Stock
Bulgin 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 312-2670
  • Mfr. Part No. FX0430/63
Each
HK$82.40
In Stock
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
In Stock
Schurter 20A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 344-5636
  • Mfr. Part No. 0031.1753
Each (In a Pack of 5)
HK$33.00
In Stock
Littelfuse SMD Non Resettable Fuse 12A, 65V
  • RS Stock No. 738-2936
  • Mfr. Part No. 0451012.MRL
Each (In a Pack of 10)
HK$12.24
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