Is this text canon in Theravada Buddhism? As far as I know, it is chanted in Myanmar.
http://www.myanmarnet.net/nibbana/dharana.htm
Although some might not believe in the authenticity of this text, I think it can still serve as a protection and is quite beneficial because it’s about the qualities of the Buddha, so it can be a form of Buddhanusati which I believe can protect us.