V320LT20AP Varistance MOV 320VAC 420VDC 4500A 561V...
C-III Series - High Energy Radial Leaded Varistor - https://www.littelfuse.com/media?resourcetype=datasheets&itemid=39cf43c8-153a-4f48-b2c1-03b4a0166100&filename=littelfuse-varistor-ciii-datasheet