Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SU40KX found under by Promax 99 Ltd. The National Stock Number assigned to this part is 6130016242904, and the Federal Supply Class is 6130 Converters Electrical Non Rotating. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SU40KX.