Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B40.0 found under Heater Thermal Rele by Schneider Electric Usa Inc. The National Stock Number assigned to this part is 5999005009344, 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 B40.0.