/diy/ - Do It Yourself

>>1413427
If you're using the FQP50N06 you linked you'll probably be fine then. If you make sure your switch voltage is >10V even taking the on resistance as worst case you'll be dissipating ~8.8W. Don't forget to heat-sink & thermal grease it, otherwise it's gonna toast itself pretty quickly.
Yeah, relays are convenient since they completely isolate the two circuits, but they consume a fair amount of power themselves. Cheap Chinese SSRs do the job, but they'd be over-specced for DC applications.

>>1413431
It's the most common type for lead-free, "SAC" solder alloys, slightly lower melting point than other lead-free solders. I think there's some edge case-stuff depending on what the contact material is too, Tektronix used to put reels of it inside some of their equipment.