uxcell a14092600ux0438 Open Frame Actuator Linear Mini Push Pull Solenoid Electromagnet, DC 4.5V, 40 g/2 mm

This actuator works fine with 3.3V. Obviously the pull force won't be as strong, but it's strong enough to retract the piston. Less voltage == less current == less heat == less wear on the device. It also works with 5V without frying, but probably wouldn't last very long.

I like the small size, and it's reliable. But the return spring is just barely strong enough to hold the plunger in place against gravity.

Could be a little stronger but get's the job done.

Yet another component that was used in the creation of an automated dog door lock

Make sure to pay attention to the size details because these things are tiny!! Unfortunately these will not work for the project that I am working on, but they do work for the prototype and testing out my code. I am working on a biometric locking mechanism with an ESP 8266.

Tiny solenoid. Not good for bigger projects. Still has some power but not as effective as the other ones in the market. Also the wires are really short

Good quality bought it for my son for his school science project.

A lot smaller than expected and broke same day. Could’ve ordered this from overseas for $2, but needed it quick and it broke first day. Waste of money.

遠くに置いてあるオーディオ機器のボタンを押したくて購入したのですが、出力足りませんでした。north star designのsupremoというDACなのですが、リモコンが付いていないため、遠隔でスイッチを押せないかと思いましたが、この部品では無理でした。余程柔らかいボタン以外は無理でしょう。

Reading other customer reviews is why I purchased these. I needed miniature actuators for a project making these perfect. They were much better then I expected!!

Very effective at bonging a bell. great value.

Does the job

Good for its price. Gets a little hot. Not a lot of strength, but it's good for a simple project.