This part is a kind of semiconductor called 2N2153.

Function of this product has (2N2152 - 2N2158) Geranium PNP Power Transistor 170 W.

Manufacturers : Central Semiconductor

Image and pinout :

Some of the text within the PDF file :

145 Adams Avenue, Hauppauge, NY 11788 USA Tel: (631) 435-1110 • Fax: (631) 435-1824 [ ... ]

2N2153 PDF Datasheet Download