When my CC BEC failed sometime ago, it took out my servos with it. But later, I found out why it fail. Its heat. The first one I fry was mounted next to my MM ESC...good source of heat there. One of my friend mount his in the same matter, and he fry his too. The second CC BEC I got, I mounted it where is not next to any source of heat and a location where air and pass over it...and no problem since...knock on wood.