ms303LEV-MS303-DS. Mfr. Model # MS303-DS. Skip to the end of the images gallery . Skip to the beginning of the images gallery . Product Description. 30 Amp, 600V, Three-Pole, ThreePart #: MS303. Download. File Size: 136Kbytes. Page: 2 Pages. Description: 3.0A SCHOTTKY BARRIER DIODE. Manufacturer: Zibo Seno Electronic Engineering