Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S6420A found under Semiconductor Device Thyristor by Advanced Semiconductor. The National Stock Number assigned to this part is 5961003423071, 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 S6420A.