It looks like a power diode but a better picture of its markings and placement on the ckt board would clear up the magic ball a bit better.
Cool, Thank you to both of you. I found it, and already bought some of them.It is 600V surge arrester:
https://www.tdk-electronics.tdk.com/inf/100/ds/N81-A600X-X2830xxxx.pdfView attachment 190095