Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number APT20M34BLL found under Transistor by Microsemi Corp Power Products. The National Stock Number assigned to this part is 5961015491048, 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 APT20M34BLL.