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

121 of 999+
Temporarily out of stock
ABB AC Switch Disconnectors Accessories Phase Barrier for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9697
  • Mfr. Part No. 1SCA100768R1001
Each
HK$792.07
Temporarily out of stock
ABB S803N MCB, 3P, 10A Curve D, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-424
  • Mfr. Part No. 2CCS893001R0101
Each
HK$4,817.25
Temporarily out of stock
Schneider Electric, ComPacT MCCB 1P 100A, Breaking Capacity 40 kA, Fixed Mount
  • RS Stock No. 655-283
  • Mfr. Part No. C10M1TM100
Each
HK$3,877.81
Temporarily out of stock
ABB S802C MCB, 2P, 50A Curve D, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 141-122
  • Mfr. Part No. 2CCS882001R0501
Each
HK$3,075.85
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 2P, 32A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-609
  • Mfr. Part No. 2CDS272061R0538
Each
HK$3,128.66
In Stock
Schneider Electric Resi9 R9F2 MCB, 3P, 32A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 212-088
  • Mfr. Part No. R9F28332
Each
HK$1,616.56
Temporarily out of stock
ABB S800S MCB, 4P, 16A Curve C, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-721
  • Mfr. Part No. 2CCS864001R0164
Each
HK$7,703.18
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 40A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-375
  • Mfr. Part No. 3VA5140-5ED21-0AA0
Each
HK$2,047.50
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-305
  • Mfr. Part No. 3VA6440-6KP41-2AA0
Each
HK$40,887.40
Temporarily out of stock
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-393
  • Mfr. Part No. 3VA5340-5GC41-2AA0
Each
HK$17,072.50
Temporarily out of stock
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-864
  • Mfr. Part No. 3VA5225-7GD41-0AA0
Each
HK$14,227.10
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-514
  • Mfr. Part No. 3VA6140-7HN31-2AA0
Each
HK$7,299.10
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-312
  • Mfr. Part No. 3VA5220-7ED41-0AA0
Each
HK$12,433.20
Temporarily out of stock
Siemens, SENTRON MCCB 3P 175A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-488
  • Mfr. Part No. 3VA5217-6EF31-2AA0
Each
HK$10,453.80
Temporarily out of stock
Eaton 1.25kA Bolted Tag Fuse, D1, 550V ac, 149mm
  • RS Stock No. 182-1386
  • Mfr. Part No. GH1250
Each
HK$4,778.70
Temporarily out of stock
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-403
  • Mfr. Part No. 3VA5210-6GF41-2AA0
Each
HK$13,237.40
Temporarily out of stock
Siemens, SENTRON MCCB 4P 350A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-323
  • Mfr. Part No. 3VA5335-7EF41-2AA0
Each
HK$22,330.30
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 30A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-334
  • Mfr. Part No. 3VA5130-6EC41-0AA0
Each
HK$3,507.30
Temporarily out of stock
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-311
  • Mfr. Part No. 3VA5325-7EC31-2AA0
Each
HK$13,794.10
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-683
  • Mfr. Part No. 3VA6140-6KM31-0AA0
Each
HK$14,721.90
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