Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MT0-303E-1-480VAC found under Heating Element Electrical Immer by Chromalox Corp. The National Stock Number assigned to this part is 4540012472302, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MT0-303E-1-480VAC.