Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1775-S1-U20D found under Coil Electrical by Square D Co. The National Stock Number assigned to this part is 5950010249461, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1775-S1-U20D.