Push Pull Solenoid DC 12V 35mm Long Stroke Small Electromagnetic Solenoids Electric Magnet For Automobiles, DIY (DC 12V)

Got here on time. Great price. It works. Thanks

There wasnt any amp or volt ratings over then 12 v. I tried every amp setting i had. The coil over heated and at over 230 degrees i pulled the plug. I need to have it energized for 1 hour and that didnt happen. Not sure what this is for . A push button then off. lol Careful what u use this for. it over heats fast.

Can not remove end it can only push not to useful

I observed roughly 1.5 Ohms for the coil resistance, as you'd expect for a 12 V, 8 A coil. If you actually try to hold the cylinder in, against the spring, at full power, you'll be burning 96 W; I doubt this is meant to sustain that continuously. This is for applications that need a quick burst of force. I was able to actuate the solenoid briefly (then release) by charging a 10,000 uF capacitor to 25 V, then discharging it into the coil. That's about 5 J of energy for a quick burst action. I was able to actuate the solenoid with 5 V (about 3 A drawn), but the action is much slower, and probably not guaranteed to work in all situations. Even though it actuated slowly, the force holding the cylinder in, with 5 V, was tremendous. I confirmed that even 1 V would hold the cylinder in against the spring. So I think there is a way to use this in a mode with continuous power to hold the cylinder in, if you were able to arrange to pull the cylinder in with 12 V, then reduce the voltage considerably to hold the cylinder. But that would take some experimentation in the particular application. Also, note: 5 V did not pull the cylinder in, in both polarities. I assume this means the cylinder was slightly magnetized, so the force is different, depending the the polarity of the magnetic field. The wires are not color coded; they are both black, so I assume you're supposed to think the sensitivity is the same in each polarity. This is only important if you were trying to actuate this thing with the minimum power necessary.

This is big, heavy and provides a lot of force. The total (unpowered length) is about 5 inches and it weighs over a pound. I tested it at 12v and it actuates correctly with 2 in displacement.