Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3SE3020-1A found under Switch Sensitive by Siemens Energy And Automation Inc. The National Stock Number assigned to this part is 5930123165562, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3SE3020-1A.