0000950123-01-001115 424B5 1 20010212 CALPINE CORP 0000916457 4911 770212977 DE 1231 424B5 33 333-48274 1534544 50 WEST SAN FERNANDO ST SAN JOSE CA 95113 4089955115 50 W SAN FERNANDO SUITE 500 SAN JOSE CA 95113 424B5 1 f69347b5e424b5.txt PROSPECTUS SUPPLEMENT