This part is a kind of semiconductor called ZPY33.

Function of this product has Zener Diodes.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

ZPY1 thru ZPY100 Vishay Semiconductors formerly General Semiconductor Zener Diodes VZ Range 1.0, 3.9 to 100V Power Dissipation 1.3W DO-204AL (DO-41 Glass) max. .161 (4.1) min. 1.102 (28.0) Features • Silicon Planar Power Zener Diodes • For use in stabilizing and clipping circuits with high power rating. • The Zener voltages are graded according to the international E 12 standard. Smaller voltage tolerances are available upon request. • These diodes are also available in the MELF case with the type designation ZMY10 … ZMY100. max. ∅ 0.102 (2.6) Cathode Mark min. 1.102 (28.0) Mechanical Data max. ∅ 0.034 (0.86) Case: DO-41 Glass Case Weight: approx. 0.35g Packaging Codes/Options: D9/5K per 13” reel (52mm tape), 10K/box E1/5K per Ammo mag. (52 mm tape), 10K/box Dime [ ... ]

ZPY33 PDF Datasheet Download