MARS 44513 Transformer

Looking for a heavy-duty control solution? The MARS 44513 Transformer is a 75VA powerhouse engineered for contractors who need high-capacity performance and multi-tap flexibility. This HVAC control transformer is a direct, identical replacement for the 7541C, making it the industry standard for upgrading underpowered 40VA or 50VA circuits that fail under the load of modern high-draw components.

Designed with a primary voltage range of 120/208/240/480V and a stable 24V secondary output, this foot mount transformer simplifies inventory by covering almost any commercial or residential application. It features a manual reset circuit breaker to protect the control string from overcurrent and shorts, eliminating the need for external inline fuses. The NEMA Class II open construction ensures low heat rise and efficient operation, even when powering complex zoning panels, multiple contactors, or high-draw Wi-Fi thermostats. Whether you are performing a 75VA transformer replacement or a new system integration, the MARS 44513 provides the overhead required for reliable 24-volt control circuits.

• Universal Primary Voltage: Multi-tap leads for 120V, 208V, 240V, and 480V inputs allow for maximum job site versatility.
• Integrated Protection: Built-in UL-recognized manual reset circuit breaker prevents secondary winding failure during low-voltage shorts.
• High VA Rating: 75VA capacity provides 3.12 Amps of output, ideal for systems with humidifiers, electronic air cleaners, and zoning dampers.
• Quiet Operation: Heavy-gauge welded laminations minimize core vibration and electromagnetic hum in residential installs.
• Standard Foot Mount: Compact footprint with slotted mounting holes ensures compatibility with existing furnace or air handler control cabinets.

Can I use the MARS 44513 to replace a 40VA transformer?
Yes. In fact, upgrading to a 75VA unit is often necessary when adding accessories like smart thermostats or zoning systems that exceed the current limit of a standard 40VA transformer.

Is this transformer compatible with the 7541C model?
The 44513 is functionally identical to the 7541C. It shares the same electrical specifications, mounting profile, and wire lead configuration.

How do I reset the transformer if it trips?
Locate the white or red button on the transformer housing. If an overcurrent event occurs, the circuit breaker will pop; once the short is cleared, simply depress the button to restore 24V power.

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.