Mars mars-50354 Control Power Transformer 40 Va

Product Description

The MARS mars-50354 is a foot-mount, open-construction control power transformer designed for HVAC control circuits. It steps down line voltage from a 120, 208, or 240 volt AC primary to a 24 volt AC secondary at a 40 VA power rating. This multi-tap primary configuration makes it suitable for a wide range of residential and light commercial installations where a single transformer must accommodate different supply voltages. Licensed HVAC technicians and electricians install this type of transformer when replacing failed or undersized control transformers in forced-air systems, heat pumps, and hydronic controls.

The mars-50354 fits typical HVAC control applications where 24-volt class-2 circuits power thermostats, zone controllers, gas valves, and relay coils. The foot-mount open construction allows direct mounting to a panel or chassis surface inside an air handler, furnace cabinet, or electrical enclosure. Its multi-tap 120/208/240 volt primary suits both single-phase residential service and light commercial multi-tap panels. Installation is straightforward for any technician working with low-voltage control wiring on split systems, package units, or hydronic boiler controls.

Key Features

• Multi-tap primary accepts 120, 208, or 240 volts AC to match varied supply voltages
• 24 volt AC secondary output for standard HVAC low-voltage control circuits
• 40 VA power rating supports thermostats, zone valves, and relay coils simultaneously
• Foot-mount design enables direct fastening to panel or chassis surfaces
• Open construction provides passive ventilation to manage operating temperature

Compatibility

Designed as an OEM-style replacement control power transformer for residential and light commercial HVAC systems requiring a 24-volt secondary with a multi-tap 120/208/240 volt primary and 40 VA capacity.

Installation Notes

Installation should be performed by a licensed HVAC technician or electrician. Always disconnect and lock out power at the main disconnect before removing or installing a control transformer. Verify that the primary tap wiring matches the measured supply voltage before energizing. Total VA load of all connected 24-volt devices must not exceed the 40 VA rating of the transformer to prevent overheating.

Technical Specifications

• Primary Voltage: 120/208/240 volts AC (multi-tap)
• Secondary Voltage: 24 volts AC
• Power Rating: 40 VA
• Mounting Style: Foot-mount
• Construction: Open
• UNSPSC Code: 39122200

Standard Information

• Brand: MARS
• Manufacturer Part Number: mars-50354