Functional Devices TR50VA001 Transformer This HVAC safety switch opens

This HVAC safety switch opens the circuit to prevent the furnace from operating in an unsafe thermal state

Designed for compatibility with Robertshaw 1890 and 1898 series orifices

This high-pressure capillary tube assembly ensures stable superheat values by regulating liquid refrigerant flow into the evaporator coil

the M9000-161 Replacement Anti-Rotation Bracket is a critical component for maintaining mechanical integrity

Functional Devices TR50VA001 Transformer This HVAC safety switch opensFor veteran technicians and building automation contractors, the Functional Devices TR50VA001 Transformer is a reliable workhorse designed for Class 2 control circuits. This 50VA rated unit features a 120Vac primary voltage and a consistent 24Vac secondary voltage, making it ideal for powering HVAC controllers, relays, and low voltage safety circuits. Built with a robust split bobbin construction, it provides high level isolation between primary and