This part is a kind of semiconductor called 1N750.

Function of this product has SILICON PLANAR ZENER DIODES.

Manufacturers : GOOD-ARK Electronics

Image and pinout :

Some of the text within the PDF file :

1N746 THRU 1N759 SILICON PLANAR ZENER DIODES Features Silicon Planar Zener Diodes 10%. Add suffix “A” Standard Zener voltage tolerance is for 5% tolerance. Other tolerances, non standard and higher Zener voltages upon request. DIM ENSIONS DIM A B C D inches Min. 1.083 Max. 0.154 0.075 0.020 Min. 27.50 mm Max. 3.9 1.9 0.52 Note Absolute Maximum Ratings (Ta=25 ) Symbols Values Units Zener current see Table "Characteristics" Power dissipation at Tamb=50 Junction Temperature Storage temperature range Ptot Tj TS 400 1) mW 175 -65 to +175 Note: (1) Valid provided that leads at a distance of 8 mm from case are kept at ambient temperature. Characteristics Thermal resistance junction to ambient Air at Tamb=25 Symbols Min. Typ. Max. Units RthA VF - - 0.3 1) K/mW V Forward voltage [ ... ]

1N750 PDF Datasheet Download