I'm just copying NASA's nomenclature to be honest. It's a black hole that formed when a sufficiently large star undergoes supernova. The remaining black hole is at least 3 times more massive than the sun, but probably 5-8 times the mass of the sun.
Plopping down such a black hole on top of the Sun would possibly rip the Earth apart from the sudden gravitational wave, possibly atomize the Earth from the ensuing explosion. If neither of that happens then the resulting higher gravity would pull on the Earth 3-8 times stronger. That would change the orbit, wherever the Earth is would become the new apoapsis, the periapsis would be significantly closer, possibly within the roche limit.
https://www.nasa.gov/image-article/s...ss-black-hole/
https://en.wikipedia.org/wiki/Stellar_black_hole