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

41 of 999+
Legrand MCB, 1P, 16A
  • RS Stock No. 293-1417
  • Mfr. Part No. 0 058 11
Each
HK$121.30
Littelfuse 3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 787-4246
  • Mfr. Part No. 0239003.MXP
Each (In a Pack of 10)
HK$5.34
RS PRO BS 1362, F, T Fuse Kit
  • RS Stock No. 893-8546
Each
HK$487.20
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-255
  • Mfr. Part No. 3VA5320-5GC41-0AA0
Each
HK$12,000.20
Schneider Electric Resi9 R9PF MCB, 3P, 16A, 400V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8967
  • Mfr. Part No. R9PFC716
Each
HK$873.59
RS PRO 15A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 563-750
Each (In a Pack of 10)
HK$4.17
Better World
Schneider Electric, ComPacT NSX MCCB 3P 200A, Fixed Mount
  • RS Stock No. 254-6355
  • Mfr. Part No. C25F3TM200
Each
HK$15,047.40
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4177
  • Mfr. Part No. 3VA1112-3EF36-0AA0
Each
HK$3,280.90
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 25A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-545
  • Mfr. Part No. 3VA5125-6ED21-1AA0
Each
HK$2,362.90
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4203
  • Mfr. Part No. 3VA1116-3EE36-0AA0
Each
HK$4,890.60
Siemens SENTRON Door Feedthrough Accessory for use with 3VL2, 3VL3, For 3VL1, Operating Shafts 6 x 6 mm
  • RS Stock No. 266-646
  • Mfr. Part No. 8UC7121-8BD15
Each
HK$1,155.20
Littelfuse 60A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 219-3592
  • Mfr. Part No. 0299060.TXN
Each (In a Pack of 10)
HK$23.51
Eaton 6A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 848-2933
  • Mfr. Part No. AGC-6-R
Each
HK$32.50
Better World
Siemens, SENTRON MCCB 3P 80A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4348
  • Mfr. Part No. 3VA1180-3EE36-0AA0
Each
HK$2,408.90
Better World
Siemens SENTRON 3VA1 MCB, 1P, 32A
  • RS Stock No. 224-7840
  • Mfr. Part No. 3VA1132-4ED16-0AA0
Each
HK$1,049.70
Siemens Fuse Holder Retaining Spring
  • RS Stock No. 202-7090
  • Mfr. Part No. 5SH5400
Each (In a Pack of 25)
HK$8.18
Better World
Siemens Sentron 5SY4 MCB, 1+N, 20A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1451
  • Mfr. Part No. 5SY4520-8
Each
HK$430.10
ABB IEC Range Busbar for use with DDA200, F200, S200
  • RS Stock No. 250-4747
  • Mfr. Part No. 2CDL231001R1006
Each
HK$55.20
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 10A Curve C, 500V DC
  • RS Stock No. 772-1521
  • Mfr. Part No. A9N61528
Each
HK$1,688.10
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 20 kA, Fixed Mount
  • RS Stock No. 232-0088
  • Mfr. Part No. 1SDA054396R1 T5N630 FF PR221-LS 630A
Each
HK$15,115.30
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