Laser replacement. May I use any Laser for PS3 Super Slim?

Looking at the part names you have provided and the compatability list of the laser you have bought, everything should work perfectly. If you still have doubt with the product you have ordered, googling "KEM-850 PHA" will throw up tons of places with replacement parts for exactly that modell.

serial.02-27445866-1916624-cech-4004a