Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SD1520-5 found under Transistor by Thomson Csf Components Corp. The National Stock Number assigned to this part is 5961013185976, 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 SD1520-5.