Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number IC3603A143C found under Heatsink by General Electric Co. The National Stock Number assigned to this part is 5999009426502, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like IC3603A143C.