White Rodgers S84Z-401 E10 Transformer

Description:

The White-Rodgers S84Z-401 E10 Transformer is used in residential and commercial HVAC systems for stepping down line voltage to low voltage control power for thermostats, relays, gas valves, and HVAC control circuits. Commonly installed in furnaces, air handlers, refrigeration systems, rooftop HVAC units, and industrial 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 S84Z-401 E10 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 automation panels where stable 24/25VAC output is critical for maintaining thermostat communication and HVAC component control. The transformer supports continuous-duty operation in heating, cooling, and industrial process control applications.

Technical Specifications:

• Brand: White-Rodgers
• Part Number: S84Z-401 E10
• Product Type: Class 2 Control Transformer
• Power Rating: 40 VA
• Primary Voltage: 120/208/240 VAC
• Secondary Voltage: 24/25 VAC
• Frequency Rating: 60 Hz
• Transformer Type: Step-Down HVAC Control Transformer
• Mounting Style: Foot Mount / Multi-Mount Skeleton Type
• Primary Connection Type: Lead Wires
• Secondary Connection Type: Lead Wires or Screw Terminals
• Application: Low Voltage HVAC Power Conversion
• Compatible Equipment: Furnaces, Air Handlers, and HVAC Systems
• Maximum Ambient Temperature: 150°F
• Industrial Use: Residential and Commercial HVAC Systems
• Construction Type: Class 2 Energy Limiting Transformer

Common Replacements:

• Honeywell AT140A1000 Transformer
• White-Rodgers 90-T40F3 Transformer
• Mars 50354 Class 2 Transformer