As I need lots of relays in my project and they have to switch a lot of times, I'm wondering if it is possible to replace relays with some smaller and more reliable parts?
In my project I'm using Arduino to control some 16 volts DC circuits, each circuit uses different amount of current, from milliamps to 50 amps.
For 50A you will need a beefier MOSFET than the IRL4Z44N. That's also gonna be a really bulky relay - probably more like a contactor, as switching 50A of DC is not trivial. A MOSFET Is usually a more suitable switch than a relay for such currents. Or maybe an IGBT?