Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CCS 5500 173ROHS found under Relay Solid State by Ultra Electronics Limited. The National Stock Number assigned to this part is 5945016227077, 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 CCS 5500 173ROHS.