Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3521C120V60HZ found under Relay Electromagnet by Automatic Switch Company. The National Stock Number assigned to this part is 5945014652879, and the Federal Supply Class is 5945 Relays And Solenoids. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3521C120V60HZ.