Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AR4.0 found under Thermal Overload Re by Schneider Electric Usa Inc. The National Stock Number assigned to this part is 5945006313519, and the Federal Supply Class is 5945 Relays And Solenoids. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AR4.0.