Honeywell, AT150A1007/U, Transformer, 24 V, 60 Hz

Honeywell AT150A1007/U – 50 VA Foot-Mount Transformer, 120V to 24V

The Honeywell AT150A1007/U is a general-purpose, foot-mounted transformer designed for use in HVAC control circuits requiring 24 VAC power. It features a 120 VAC primary input and provides a nominal 27.5 VAC secondary output at 50 VA. This transformer is built for consistent performance in heating and cooling control systems across a variety of residential and light commercial applications.

It is suitable for powering thermostats, zone valves, relays, and other low-voltage control devices. The unit includes color-coded lead wires on the primary side and screw terminals on the secondary for simplified field wiring.

Key Features

• Input Voltage: 120 VAC primary
• Output Voltage: 27.5 VAC secondary (24 VAC nominal)
• Power Capacity: 50 VA
• Mounting Configuration: Foot mount with optional clamp, plate, or panel mounting capability
• Lead Connections: Primary – color-coded lead wires; Secondary – screw terminals
• Operating Temperature Range: -20°F to 105°F (-29°C to 40.5°C)
• Compliance: UL 1585 listed

Product Dimensions

• Height: 1-11/16 in
• Width: 3-3/16 in
• Depth: 1-3/4 in

Installation Guidelines

The transformer is intended for fixed installation by licensed professionals familiar with control system wiring. All connections must conform to applicable electrical codes. Ensure correct input voltage before energizing, and verify secondary load does not exceed the 50 VA rating. Use the mounting configuration that best suits the equipment enclosure or panel layout.

Application Notes

• Designed for use with 24V HVAC control systems
• Supports relays, thermostats, zone valves, and contactors requiring 24 VAC
• Suitable for replacement or new installations