The Beam 100550 circuit board has been discontinued. The AstroVac PC120STW circuit board is the appropriate substitute.
The Beam 100550 Circuit Board is a genuine 120 volt replacement circuit board for many Beam, Eureka, Frigidaire, Honeywell and Dust Care central vacuum units. It can also be used to replace circuit boards in select AirVac, Filtex and M&S units for which the genuine part is no longer available.