This part is a kind of semiconductor called 1N5929B.

Function of this product has Zener Voltage Regulator Diodes.

Manufacturers : Motorola

Image and pinout :

Some of the text within the PDF file :

MOTOROLA SEMICONDUCTOR TECHNICAL DATA 1 to 3 Watt DO-41 Surmetic 30 Zener Voltage Regulator Diodes GENERAL DATA APPLICABLE TO ALL SERIES IN THIS GROUP 1 to 3 Watt Surmetic 30 Silicon Zener Diodes . . . a complete series of 1 to 3 Watt Zener Diodes with limits and operating characteristics that reflect the superior capabilities of silicon-oxide-passivated junctions. All this in an axial-lead, transfer-molded plastic package offering protection in all common environmental conditions. Specification Features: • Surge Rating of 98 Watts @ 1 ms • Maximum Limits Guaranteed On Up To Six Electrical Parameters • Package No Larger Than the Conventional 1 Watt Package Mechanical Characteristics: CASE: Void-free, transfer-molded, thermosetting plastic FINISH: All external surfaces are corrosion r [ ... ]

1N5929B PDF Datasheet Download