Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TC4621R found under Receiver Light Signal by Photonis Usa Pennsylvaniainc. The National Stock Number assigned to this part is 6030013458728, and the Federal Supply Class is 6030 Fiber Optic Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TC4621R.