Mars M50320 Control Transformer 75VA 120-480V to 24V

Product Description

The MARS M50320 is a multi-tap control transformer rated at 75 VA, designed for HVAC control circuit applications. It steps down line voltage from a primary tap selection of 120, 208, 240, or 480 volts to a 24-volt secondary output, which is the standard low-voltage supply for thermostats, contactor coils, and control boards in heating and cooling equipment. This transformer is a foot-mount style, making it compatible with panel and equipment chassis installations. Licensed HVAC technicians and commercial refrigeration mechanics are the typical installers for this type of component.

The M50320 is suited for both residential and light commercial HVAC systems where a reliable 24-volt control circuit is required. Its multi-tap primary allows a single transformer to cover multiple supply voltage scenarios, making it a practical stocking item for service contractors. Typical applications include replacement installations in rooftop units, air handlers, furnaces, and packaged HVAC equipment where the original control transformer has failed or is undersized for added accessories.

Key Features

• 75 VA output capacity supports standard 24-volt HVAC control circuits
• Multi-tap primary accepts 120, 208, 240, or 480 volts for broad voltage compatibility
• 24-volt secondary output matches standard thermostat and control board requirements
• Foot-mount design allows secure chassis or panel installation
• Single SKU covers multiple primary voltage applications, reducing stocking complexity

Compatibility

Designed as an OEM-style replacement control transformer for residential and light commercial HVAC equipment requiring a 75 VA, 24-volt secondary control circuit with a multi-tap primary voltage input.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified electrician. Disconnect and lock out all power to the equipment before removing or installing the transformer. Verify that the correct primary tap is selected to match the supply voltage before energizing the circuit. Work must comply with applicable NEC requirements and local electrical codes.

Technical Specifications

• VA Rating: 75 VA
• Primary Voltage: 120, 208, 240, 480 volts (multi-tap)
• Secondary Voltage: 24 volts
• Mount Type: Foot Mount
• UPC: 685744503200

Standard Information

• Brand: MARS
• Manufacturer Part Number: M50320