ms303ms303-ds 30 Amp, 600 Volt, Three-Pole, Three Phase AC Manual Motor Controller, Suitable as Motor Disconnect, Toggle, Industrial Grade, Non-Grounding, Back & Side WiringPart #: MS303. Download. File Size: 136Kbytes. Page: 2 Pages. Description: 3.0A SCHOTTKY BARRIER DIODE. Manufacturer: Zibo Seno Electronic Engineering