ms303Part #: MS303. Download. File Size: 136Kbytes. Page: 2 Pages. Description: 3.0A SCHOTTKY BARRIER DIODE. Manufacturer: Zibo Seno Electronic Engineeringms303-ds 30 Amp, 600 Volt, 3-Pole, Three-Phase Single Throw AC Manual Motor Controller, Suitable as Motor Disconnect, Standard Toggle, Industrial Grade, Non-Grounding, Back &