Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TRN-4903A found under Assembly Board by Motorola Communications Group Parts. The National Stock Number assigned to this part is 5961012234653, 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 TRN-4903A.