Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PB1-3CB found under Heat Sink Electrica by Cts Electronic Components. The National Stock Number assigned to this part is 5999012154069, 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 PB1-3CB.