Arduino Pro Mini 5v with Solenoid Door Lock 12v

manor_royal:
Try the IRL520N even if its Rds is almost 2 ohms not under 0.1 or whatever. Or use a crappy old Darlington TIP120. So what? This is a hobby site not engineering school- use what you have and live with its inefficiencies.

Thanks once again, will try to use it too, i can find Darlington TIP120.