The High Voltage PNP Bipolar Transistor is designed for general purpose switching applications. The device is housed in the TO-92 package, which is designed for medium power applications. Replacement active OPN: 2N6517 (Legacy Fairchild) https://www.onsemi.com/products/discretes-drivers/general-purpose-and-low-vcesat-transistors/2n6517-legacy-fairchild