Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MC5609 found under Semiconductor Devic by Microsemi Corp Massachusetts. The National Stock Number assigned to this part is 5961011425708, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MC5609.