White Rogers 90-T40F3 Transformer

Description:

The White-Rodgers 90-T40F3 Transformer is used in residential and commercial HVAC systems for stepping down line voltage to low voltage control power for thermostats, relays, contactors, gas valves, and HVAC control circuits. Commonly installed in furnaces, air handlers, refrigeration systems, and HVAC control panels. Maintenance teams, HVAC technicians, and electrical contractors use this part for transformer replacement, control system repair, retrofit projects, and restoration of low voltage power distribution.

Applications:

The White-Rodgers 90-T40F3 transformer is commonly used in HVAC and industrial environments requiring reliable low voltage power conversion and dependable control circuit operation. It is frequently installed in furnace control systems, air conditioning equipment, refrigeration assemblies, and HVAC automation panels where stable low voltage output is critical for maintaining thermostat communication and HVAC component control. The transformer supports continuous-duty operation in heating, cooling, and process control applications.

Technical Specifications:

• Brand: White-Rodgers
• Part Number: 90-T40F3
• Product Type: Control Transformer
• Application: Low Voltage HVAC Power Conversion
• Transformer Function: Step-Down Voltage Supply
• Compatible Equipment: Furnaces, Air Handlers, and HVAC Systems
• Voltage Type: Low Voltage Control Power
• Mounting Type: Panel or Equipment Mounted
• Industrial Use: Residential and Commercial HVAC Systems
• Operating Environment: Continuous-Duty Electrical Applications
• System Compatibility: Thermostats, Relays, and Gas Valve Circuits
• Construction Type: HVAC Control Power Transformer
• Usage Type: HVAC and Refrigeration Equipment Control
• Maintenance Application: Transformer Replacement and Retrofit

Common Replacements:

• Honeywell AT140A Transformer
• Packard PF42440 Transformer
• Mars 50354 Control Transformer