Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A4D1011-1 found under Transistor by Evoqua Water Technologies Llc. The National Stock Number assigned to this part is 5961016775423, 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 A4D1011-1.