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Minimum voltage to deactivate 12VDC relay

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Good morning, I want to connect a relay in parallel to a 12VDC battery, but let the relay set aside trigger once the battery voltage is less than 11VDC, my question is the following, a 12VDC relay, what is the voltage minimum for your stop shooting?

Edited Title
  • 1 month ago

    Avatar de ricbevi

    Although the nominal working voltage of the coil of a relay is 12V, this does not mean that exactly that voltage will be activated and deactivated if it is lower. These levels of activation and deactivation depend on the constructive characteristics of the coil and vary greatly from one manufacturer to another even for relay of similar characteristics. If something is needed with precision, a comparator circuit must be built and the levels of On / Off voltage as suggested by Ennio Montenegro.

3 Proposed Solutions

  • 1 month ago

    Avatar de Greenmaster

    Excellent! although it is easier to measure the impedance of the relay coil and get a linear potentiometer (1K should be enough estimate) and connect it in series with the relay coil ... then by actuating the potentiometer you regulate it to cut 11V

  • 1 month ago

    Avatar de Pilaraprendiz

    Nothing more proof.
    It is just a suggestion.

The voltage with which it stops operating (dropout), can be close to 4VDC.
To disconnect with 11V, you must do it with a comparator circuit and activated by a transistor, having a reference voltage.
Depending on the type of relay and manufacturer, it is probably activated between 8 and 14Vdc
  • 1 month ago

    Avatar de Ennio Montenegro M.

    Hi Greenmaster
    The title did not correspond to what he mentions in the question.
    For what I edited.
    It is the deactivation voltage that you ask, not the activation voltage.