Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XP-A49 found under Holder Semiconducto by Microlab Fxr. The National Stock Number assigned to this part is 5961013400812, 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 XP-A49.