Whats the minimum amount of directors needed for a 501c3 in pa?

There is no minimum number of directors required for non-profit business entities in Pennsyvlania.  I would suggest at least 3.  Most have more because organizations often use those positions to attract people of influence in the community to participate in the organization.  501(c)(3) is a federal tax code designation for one type of a tax exempt entity.  Non-profit organization is not the same as a 501(c)(3).  State vs. federal law.  not all non-profit organizations are tax exempt.