2SC4927 silicon NPN power transistor by Hitachi. Special feature: integral damping diode(*) Package: Isolated TO-3PFM Download Hitachi 2SC4927 .pdf datasheet: Status: NOS (New Old Stock) Individually tested Component: YES RoHS compliant: no Note: (*) Due to internal composition testing this item with a PEAK DCA75 transistor tester may results in a two diode junctions with common cathode configuration or unidentified.