DIFFERENT TYPES OF SWITCHES

There are different types of switches and its categories like SPST, SPDT, Electronic Switch,  momentary, latch action, normally open and normally closed etc.

Switch is a device used for making and breaking the connection in an electric circuit.

DIFFERENT TYPES OF SWITCHES

DIAGRAM – LED AND SWITCH CONNECTION

different types of switches
Switch open

SWITCHES TYPE – MECHANICAL SWITCH AND ELECTRICAL SWITCH

1. MECHANICAL SWITCHES

  1. Single pole single through (SPST)
  2. Single pole double through (SPDT) (Toggle switch)
  3. Double pole single through (DPST)
  4. Double pole double through (DPDT)
  5. Push button switch Rotary switch etc.

 

Different type of switches
Different type of Switches

2. ELECTRONIC SWITCHES

Switches which works on electrical signal are known as electronic switch.

  1. Bipolar junction transistor (BJT)
  2. Diode
  3. Metal oxide semiconductor field effect transistor (MOSFET)
  4. Relay etc.

electronic switches

SWITCHES CATEGORIZED ON THE BASIS OF HOLDING CURRENT STATE

  1. Latch ( Normal ON/OFF )
    • SPST – Used in our homes
    • Relay
  2. Momentary
    • Door bell switch

DIFFERENT TYPES OF SWITCHES ARE ALSO CATEGORIZE BY CONTACT CONDITIONS

1. NORMALLY OPEN (NO)

Switches in normal condition they are open (which we generally use in our daily lives) when we press the button they behaves as closed and current can flow, see in diagram shown below

Normally Open Switch
Normally Open Switch

2. NORMALLY CLOSED (NC)

On the other hand NC, In their normal condition they will close when we press the button they behaves as open and current stops flowing due to break of connection in circuit, see in diagram shown below

Normally Closed Switch
Normally Closed Switch

 


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