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

47290 產品顯示為 Fuses & Circuit Breakers

20 的 999+
Phoenix Contact Thermal Circuit Breaker - Single Pole 250V ac Voltage Rating On Base Element, 20A Current Rating
  • RS庫存編號 267-1716
  • 製造零件編號 1324401
个
HK$151.30
TE Connectivity Thermal Magnetic Circuit Breakers - Potter & Brumfield W54 Single Pole 250V ac Voltage Rating Panel
  • RS庫存編號 240-8954
  • 製造零件編號 3-1393250-2
个 (以毎袋：100)
HK$51.169
Mersen 100A NH Fuse, NH00, 690V ac
  • RS庫存編號 448-3415
  • 製造零件編號 D320163
个
HK$724.87
RS PRO 4A British Standard Fuse, F1, 550V ac
  • RS庫存編號 521-2898
个（每托盘 5 ）
HK$39.86
Siemens 32A NH Fuse, NH000, 500V ac
  • RS庫存編號 396-124
  • 製造零件編號 3NA6812
个（每托盘 3 ）
HK$53.467
Siemens 16A NH Fuse, NH000, 500V ac
  • RS庫存編號 396-235
  • 製造零件編號 3NA6805
个（每托盘 3 ）
HK$54.167
Schurter PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS庫存編號 284-5388
  • 製造零件編號 0034.6620
个（每托盘 10 ）
HK$1.99
Littelfuse SMD Non Resettable Fuse 6.3A, 125V
  • RS庫存編號 738-2854
  • 製造零件編號 015406.3DR
个（每托盘 10 ）
HK$13.39
Littelfuse 0.12A Resettable Fuse, 240V dc
  • RS庫存編號 495-0713
  • 製造零件編號 LVR012K
个（每托盘 5 ）
HK$4.52
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 36 kA, Fixed Mount
  • RS庫存編號 209-4847
  • 製造零件編號 3VA1063-4ED42-0AA0
个
HK$3,596.50
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS庫存編號 209-5093
  • 製造零件編號 3VA2040-5HL42-0AA0
个
HK$6,851.30
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA
  • RS庫存編號 209-6927
  • 製造零件編號 3VA2140-5MN32-0AA0
个
HK$5,335.20
Better World
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 55 kA
  • RS庫存編號 209-7030
  • 製造零件編號 3VA1225-5EF32-0AA0
个
HK$8,151.00
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA
  • RS庫存編號 209-7052
  • 製造零件編號 3VA2040-5HL32-0AA0
个
HK$5,077.30
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA
  • RS庫存編號 209-7070
  • 製造零件編號 3VA2140-5HN46-0AA0
个
HK$7,963.00
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA
  • RS庫存編號 209-7053
  • 製造零件編號 3VA2040-5HN42-0AA0
个
HK$7,600.30
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 25 kA, Fixed Mount
  • RS庫存編號 211-3735
  • 製造零件編號 3VA1140-3EF46-0AA0
个
HK$4,486.80
Schneider Electric MCCB 4P, Fixed Mount
  • RS庫存編號 178-7898
  • 製造零件編號 LV426961
个
HK$392.93
Better World
Schneider Electric Acti9 iIG40 RCCB, 40A, 1+N Pole, 300mA, Type AC, 220 → 240V ac
  • RS庫存編號 191-6128
  • 製造零件編號 A9R77640
个
HK$1,592.14
Better World
Schneider Electric Acti9 iIG40 RCCB, 40A, 1+N Pole, 30mA, Type AC, 220 → 240V ac
  • RS庫存編號 191-6126
  • 製造零件編號 A9R67640
个
HK$1,431.88
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