This part is a kind of semiconductor called 1N759.

Function of this product has SILICON ZENER DIODES.

Manufacturers : CDIL

Image and pinout :

Some of the text within the PDF file :

Continental Device India Limited An ISO/TS16949 and ISO 9001 Certified Company SILICON ZENER DIODES 1N746 to 1N759 DO-35 400mW Hermetically Sealed Glass Package Zener Diodes ABSOLUTE MAXIMUM RATINGS DESCRIPTION SYMBOL VALUE UNIT Zener Voltage ZV 3.3 to 12 V D C Power Dissipation PD 400 mW Derating Above 50 deg C 3.2 mW/deg C Operating & Storage Junction Tj,Tstg -65 to +175 deg C Temperature Range ELECTRICAL CHARACTERISTICS (Ta=25 deg C Unless otherwise Specified , VF <1.5V @ 200mA Device Nominal* Zener Maximum Maximum @ VR Maximum Typ Type# Zener Test Zener Reverse Current Zener Temp (1) Voltage Current Impedance @25 deg C @ +150 deg C Current Coeff of Zener VZ @ IZT IZT Zzt @ IZT max max IZM Voltage *vz (V) (mA) (Ohms) (uA) (uA) (V) (mA) (% deg [ ... ]

1N759 PDF Datasheet Download