This part is a kind of semiconductor called SK310B.

Function of this product has (SK32B - SK320B) Surface Mount Schottky Barrier Rectifiers.

Manufacturers : Taiwan Semiconductor

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Some of the text within the PDF file :

creat by art SK32B - SK320B 3.0AMPS Surface Mount Schottky Barrier Rectifiers SMB/DO-214AA Pb RoHS COMPLIANCE Features — — — — — — — — — — UL Recognized File # E-326243 For surface mounted application Metal to sillicon rectifier, majority carrier conduction Low forward voltage drop Easy pick and place High surge current capability Plastic material used carriers Underwriters Laboratory Classification 94V-0 Epitaxial construction High temperature soldering: 260℃/10 seconds at terminals Green compound with suffix "G" on packing code & prefix "G" on datecode Mechanical Data — — — — — Case: Molded plastic Terminals: Pure tin plated, lead free Polarity: Indicated by cathode band Packaging: 16mm tape per EIA STD RS-481 Weight: 0.1 gram Dimensions in inches and (millimeters) [ ... ]

SK310B PDF Datasheet Download