This part is a kind of semiconductor called 16SCYQ030C.

Function of this product has SCHOTTKY RECTIFIER.

Manufacturers : International Rectifier

Image and pinout :

Some of the text within the PDF file :

PD-93964A SCHOTTKY RECTIFIER HIGH EFFICIENCY SERIES 16SCYQ030C 16 Amp, 30V Major Ratings and Characteristics Characteristics Limits IF(AV) 16 VRRM (Per Leg) IFSM @ tp = 8.3ms half-sine (Per Leg) 30 150 VF @ 16Apk, TJ =125°C (Per Leg) 0.54 Description / Features Units A V A V The 16SCYQ030C center tap Schottky rectifier has been expressly designed to meet the rigorous requirements of high reliability environments. It is packaged in the hermetic isolated TO-257AA package. The device's forward voltage drop and reverse leakage current are optimized for the lowest power loss and the highest circuit efficiency for typical high frequency switching power supplies and resonent power converters. Full MIL-PRF-19500 quality conformance testing is available on source control drawings to [ ... ]

16SCYQ030C PDF Datasheet Download