The Sun 300-1971-01 is available from Calhoun Technologies. Calhoun Tech can help your company save up to 80% on IT Hardware. Manufacturer: Sun Part Number: 300-1971-01 Details: Sun 300-1971-01 850W Pwr Sup. Rohs (St508E1/D1/R1-Bap5-90Con (Gs31-#11-4C)