Mechanical switch

Mechanical switch
This type of switch operated mechanically to preform turn ON or OFF current in an electronics or electrical circuits is called a mechanical switch .This type of switch perform switching function with some sparking. So it has low efficiency than other .
The tumbler switch is c one of the example of a mechanical switch which is used in many home appliances to perform turn ON or OFF power supply such as bulbs , heater , fans etc .In mechanical switch ,load is connected in series with a mechanical switch and the power supply (i.e battery).When the switch is close ,there is current flows in the circuits (i.e through load).When switch is open ,then there is no current flows in the circuits (i.e via load).

Disadvantages Of Mechanical Switch.
  1. In the close circuits ,the switch carries whole load current.When if there is high load currents,the contacts of switch enable to carry it without overheating.So the size of the switch is increase accordions to amounts of load current.
  2. The speed of switching operation is very low ,because of its high inertia.
  3. When the load current is high in the circuit ,then the sparking is possible at the contacts of the switch at the time of switching operations(i.e ON or OFF).

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