Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1S2051A found under Semiconductor Devic by Vishay Ltd. The National Stock Number assigned to this part is 5961003334887, 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 1S2051A.