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

49 of 999+
Better World
ABB System Pro M Compact S200 MCB, 2P, 40A Curve K, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-8015
  • Mfr. Part No. 2CDS252001R0557 S202-K40
Each
HK$768.70
Mersen 25A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0588
  • Mfr. Part No. G1017204 / FR14GR69V25
Each
HK$169.70
Schurter 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 866-4766
  • Mfr. Part No. 0031.3903
Each (In a Pack of 100)
HK$26.71
Eaton 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 852-6951
  • Mfr. Part No. HTB-48I-R
Each
HK$87.00
RS PRO 6.3A PCB Mount Fuse Holder, 250V ac
  • RS Stock No. 611-9037
Each (In a Pack of 10)
HK$9.10
Littelfuse 0.25A Resettable Fuse, 72V
  • RS Stock No. 517-6607
  • Mfr. Part No. RXEF025
Each (In a Pack of 10)
HK$2.21
Hager 20A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 250-8610
  • Mfr. Part No. LF320G
Each (In a Pack of 10)
HK$41.599
Weidmuller Electronic Circuit breaker 25mA 24V AMG ELM, 1 channels , DIN Rail Mount
  • RS Stock No. 179-2995
  • Mfr. Part No. 2080480000
Each
HK$212.60
Bulgin 13A Panel Mount Fuse Holder for 6.3 x 25mm Fuse, 1P, 250V ac
  • RS Stock No. 408-397
  • Mfr. Part No. FX0416
Each
HK$85.70
Littelfuse 20A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 878-1580
  • Mfr. Part No. 0FLM020.T
Each
HK$114.20
Littelfuse SMD Non Resettable Fuse 40A, 72V
  • RS Stock No. 895-1603P
  • Mfr. Part No. 0456040.DR
Each (Supplied on a Reel)
HK$33.18
Littelfuse 500mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4460
  • Mfr. Part No. 0216.500MXP
Each (In a Pack of 10)
HK$22.49
Littelfuse 50A Red BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6703
  • Mfr. Part No. 153.5631.5501
Each (In a Pack of 5)
HK$25.60
Schurter PC Board Non Resettable Fuse, Radial 315mA, 250V ac
  • RS Stock No. 284-5287
  • Mfr. Part No. 0034.6610
Each (In a Pack of 10)
HK$2.45
Siemens SENTRON 5SJ4 MCB, 2P, 16A Curve C, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 212-8818
  • Mfr. Part No. 5SJ4216-7HG41
Each
HK$1,169.60
Europa EUC1P EUB MCB, 1P, 20A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6471
  • Mfr. Part No. EUC1P20B
Each
HK$62.00
Europa EUC2P EUC MCB, 2P, 1A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6538
  • Mfr. Part No. EUC2P1C
Each
HK$226.50
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 35A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-365
  • Mfr. Part No. 3VA5135-5EC31-1AA0
Each
HK$3,844.20
Eaton 6A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 414-617
  • Mfr. Part No. NIT6
Each (In a Pack of 5)
HK$61.22
Schneider Electric A9R RCCB, 80A, 4 Pole, 415V
  • RS Stock No. 245-147
  • Mfr. Part No. A9R21480
Each
HK$6,104.10
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