Honeywell AT72D-1683 Step Down Transformer, 40 VA, 120V To 26.5V

The Honeywell AT72D-1683 is a 40 VA step-down transformer that converts 120-volt mains power to 26.5 volts for low-voltage control circuits. This transformer is designed to power 24-volt control systems commonly found in HVAC applications, including thermostats, gas valves, relays, and other heating and cooling equipment.

This knockout mount transformer is built to meet rigorous industry safety standards, holding NEC approval, UL listing, and CSA certification. The device features two screw-terminal connections and can be mounted via junction box knockout, foot-mounted, or plate-mounted on 4 inch × 4 inch, 4 inch octagon, or 2 inch × 4 inch electrical boxes for flexible installation options.

Features and Benefits

• Multiple Mounting Options: Clamp mount via junction box knockout, foot-mounted, or plate-mounted on standard electrical boxes including 4 inch × 4 inch, 4 inch octagon, or 2 inch × 4 inch sizes.
• Industry Certifications: NEC approved, UL listed, and CSA certified for safe operation.
• Reliable Power Conversion: Converts 120-volt primary voltage to 26.5-volt secondary voltage with a 40 VA rating for control circuits.
• Wide Operating Range: Functions reliably across temperatures from −29°C to 41°C in diverse environmental conditions.
• Screw Terminal Connections: Two screw terminals for straightforward wiring and secure electrical connections.

Specifications

• Brand: Honeywell
• Model: AT72D-1683
• Primary Voltage: 120 volts
• Secondary Voltage: 26.5 volts
• VA Rating: 40
• Termination: 2 screw terminals
• Mounting Type: Clamp mount via junction box knockout, foot-mounted, or plate-mounted
• NEMA Rating: D
• Operating Temperature: −29°C to 41°C
• Certifications: NEC approved, UL listed, CSA certified