This part is a kind of semiconductor called BZX55-15.

Function of this product has Voltage regulator diodes.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

DISCRETE SEMICONDUCTORS DATA SHEET M3D176 BZX55 series Voltage regulator diodes Product specification Supersedes data of April 1992 1996 Apr 26 Philips Semiconductors Product specification Voltage regulator diodes FEATURES • Total power dissipation: max. 500 mW • Tolerance series: ±5% • Working voltage range: nom. 2.4 to 75 V (E24 range) • Non-repetitive peak reverse power dissipation: max. 40 W. APPLICATIONS • Low voltage stabilizers or voltage references. The diodes are type branded. BZX55 series DESCRIPTION Low-power voltage regulator diodes in hermetically sealed leaded glass SOD27 (DO-35) packages. The diodes are available in the normalized E24 ±5% tolerance range. The series consists of 37 types with nominal working voltages from 2.4 to 75 V (BZX55-C2V4 to BZX55 [ ... ]

BZX55-15 PDF Datasheet Download