Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LM309H found under Microcircuit Linear by Pfizer Inc. The National Stock Number assigned to this part is 5962013022137, and the Federal Supply Class is 5962 Microcircuits Electronic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like LM309H.