How to wire a mini relay?

Discussion in 'General Electronics Chat' started by kgstewar, Jul 15, 2013.

  1. kgstewar

    Thread Starter Member

    Apr 5, 2012
    151
    6
    I purchased one of these little relays and am not sure how to wire it. The datasheet is here:

    http://www.taydaelectronics.com/datasheets/A-5014.pdf

    Of the two shown on the last page, the one I have is "Form C".

    Am I correct that:

    - pins 1 and 4 are for a normally closed circuit
    - pins 1 and 3 are for a normally open circuit
    - either pin 2 or 5 is the triggering voltage?
    - and then either pin 5 or 2 is the ground?

    Many thanks!

    Kevin
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,126
    3,048
    That's how I read it.
     
  3. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
    348
    Using an ohm-meter, you could confirm. Measure the pins you think are the coil and see if your reading agrees with the data sheet. Then measure from what the data sheet says the common pin is to the pin the data sheet says is the NC contact to check for a short.
     
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,770
    970
    pin 2,5 relay coil (non-polarized)
    pin 1= C
    pin 4= NC
    pin 3= NO

    always a good idea to add a diode reverse biased across the relays coil for emf/spike protection
     
  5. kgstewar

    Thread Starter Member

    Apr 5, 2012
    151
    6
    Thanks for the help!

    Kevin
     
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