MARS 44504 Transformer

The MARS 44504 Transformer is an essential HVAC control circuit power source designed for heavy-duty applications in air conditioning, heating, and refrigeration systems. As a 40VA step-down transformer, this Jard by MARS component provides a reliable 24V secondary output from multiple primary input options, including 120V, 208V, and 240V. Built with NEMA Class II construction, it features an open-frame foot mount design and 18-inch wire lead connections for fast integration into existing control subpanels. This is an inherently limited design, ensuring protection against short circuits without requiring external fusing in many standard configurations. For technicians troubleshooting low-voltage issues, the 44504 transformer serves as a high-compatibility multi-tap replacement that reduces truck stock by covering the three most common primary voltages found in residential and light commercial equipment.

• Multi-Voltage Primary: Supports 120, 208, and 240 VAC inputs, making it a versatile universal HVAC transformer replacement.
• 40VA Power Rating: Provides ample current for standard contactors, relays, and 24V thermostat power requirements.
• Cool Operation: Engineered for low heat rise, extending the operational life of surrounding sensitive electronic components.
• Rugged Mounting: Robust foot mount transformer base allows for secure installation in various orientations within the air handler or furnace cabinet.
• Industry Standards: UL 5085 approved and safety agency recognized for reliable Class 2 power supply performance.

Can I use this to replace a 30VA or 35VA transformer?
Yes. A 40VA rating represents the maximum load capacity. Moving to a higher VA rating is acceptable as long as the secondary voltage remains 24V; it simply provides more "headroom" for the control circuit.

What happens if I wire the primary taps incorrectly?
Incorrect wiring of the 120/208/240 primary leads can lead to immediate component failure or insufficient secondary voltage. Always verify your incoming line voltage with a multimeter and cap off any unused primary leads with wire nuts.

Does this unit include an internal circuit breaker?
The MARS 44504 is an inherently limited transformer designed to protect the circuit under short-load conditions, but it does not feature a manual reset button. For systems prone to shorts, consider adding an external 3-amp inline fuse on the secondary side.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.