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Simple question please!

Discussion in 'General Electronics Discussion' started by TE5LA, Aug 22, 2014.

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  1. TE5LA


    Aug 22, 2014
    sorry but I am a noob to electronics but here goes.

    I have a 12v DC adapter outputting 2amp which and I need to hook it up to a solenoid which is super strong. I tried with a 12v DC 2a solenoid (20N force) and its really really weak. I then tried with a 12v DC 300mA solenoid (6N force) and its super strong however it soon got hot and went bust (over current I assume). Can someone unlock this mystery for me and tell me what the best solenoid I should get for the adapter (I am stuck with the 12v 2a adapter).

    12v 2a adapter

    12v 2a solenoid (WEAK when working with above adapter, possibly defect?)

    12v 300mA solenoid (burned out)
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Perhaps the 12V 30mA solenoid was not rated for continuous use? Did you measure the current it drew? You should be able to use a 12V 5000A power supply or a 12V 1A supply and make no difference as the amp rating of a power supply is a rating of how much current CAN be supplied. The load (the solenoid in this case) determines what is drawn at any particular voltage
  3. shumifan50


    Jan 16, 2014
    You are approaching this in the wrong way. You need to find the best solenoid for your project, then you can start looking at the best one that also meets your adaptor ability. As we don't know what you are trying to do, it is difficult to advise on how to go about it.
    For example what is the duty cycle as Steve said, the solenoid has to be rated to handle this.
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