How to root Samsung Galaxy A5 (SM-A500H) running Android 6.0.1
Odin, this TWRP recovery and a SuperSU flashable zip (the thread also supplies one but it seems to be for Lollipop) should be all you need.

P.S. As of version 2.78, SuperSU is fully under the control of Chinese firm CCMT - use 2.76 if you don't trust that.