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

137 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-314
  • Mfr. Part No. 3VA6460-6JP31-0AA0
Each
HK$28,516.00
Temporarily out of stock
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-289
  • Mfr. Part No. 3VA5340-5EC41-2AA0
Each
HK$17,072.50
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-439
  • Mfr. Part No. 3VA5215-6ED41-0AA0
Each
HK$11,443.50
Temporarily out of stock
Siemens, SENTRON MCCB 4P 350A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-223
  • Mfr. Part No. 3VA5335-7GF41-2AA0
Each
HK$22,330.30
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 147-390
  • Mfr. Part No. 3VA5215-1BB41-0AA0
Each
HK$9,526.00
Temporarily out of stock
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-339
  • Mfr. Part No. 3VA5340-7EC41-2AA0
Each
HK$21,216.90
Temporarily out of stock
Siemens, SENTRON MCCB 3P 80A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-709
  • Mfr. Part No. 3VA5180-5EC31-0AA0
Each
HK$2,573.20
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 125A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-255
  • Mfr. Part No. 3VA5112-5ED11-1AA0
Each
HK$2,492.80
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 50A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-425
  • Mfr. Part No. 3VA5150-5ED11-0AA0
Each
HK$1,156.70
Temporarily out of stock
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-333
  • Mfr. Part No. 3VA5340-6EC31-1AA0
Each
HK$13,794.10
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve B, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2112
  • Mfr. Part No. A9F06216
Each
HK$487.40
Temporarily out of stock
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 147-970
  • Mfr. Part No. 3VA5215-6EC31-1AA0
Each
HK$8,907.40
Temporarily out of stock
Siemens, SENTRON MCCB 3P 225A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 256-589
  • Mfr. Part No. 3VA5322-6EF31-2AA0
Each
HK$13,422.90
Temporarily out of stock
Siemens, SENTRON MCCB 3P 350A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-438
  • Mfr. Part No. 3VA5335-5EF31-2AA0
Each
HK$13,794.10
Temporarily out of stock
Siemens, SENTRON MCCB 4P 175A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-489
  • Mfr. Part No. 3VA5217-6EF41-0AA0
Each
HK$12,185.80
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 3 kA
  • RS Stock No. 245-215
  • Mfr. Part No. 3VA6225-6HN41-2AA0
Each
HK$18,495.20
Temporarily out of stock
Siemens, SENTRON MCCB 3P 175A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-486
  • Mfr. Part No. 3VA5217-6EF31-0AA0
Each
HK$9,464.10
Temporarily out of stock
Siemens, SENTRON MCCB 2P 100A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-775
  • Mfr. Part No. 3VA5210-5EC61-0AA0
Each
HK$4,806.30
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-987
  • Mfr. Part No. 3VA5215-7GF41-2AA0
Each
HK$14,536.40
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-706
  • Mfr. Part No. 3VA6210-6JP31-2AA0
Each
HK$19,484.90
1
137
2364
Results per page

Related links