Functional Devices TR75VA001 Transformer

This 75VA Class 2 transformer serves as a reliable power solution for commercial HVACR control circuits, converting 120Vac primary voltage to a stable 24Vac secondary output. Engineered by Functional Devices, the TR75VA001 features an integrated circuit breaker for superior overcurrent protection, eliminating the need for external fusing and protecting sensitive low-voltage components from upstream surges. The dual mounting configuration—utilizing both a foot mount and single threaded hub—provides the flexibility needed for secure installation on electrical enclosures or 4x4 junction boxes. As a veteran-grade HVAC control transformer, this unit is designed to handle the inductive inrush loads common in contactors, relays, and building automation controllers.

Key Benefits

• Integrated Manual Reset Circuit Breaker: Provides immediate protection against secondary shorts and overloads without the hassle of replacing fuses.
• High Power Capacity: The 75VA rating supports larger control loops and multiple actuators compared to standard 40VA models.
• Versatile 1/2" NPT Hub Mount: Simplifies conduit connection and ensures a secure, code-compliant fit in high-vibration environments.
• UL Listed Reliability: Built to meet strict safety standards for Class 2 power sources in industrial and commercial applications.

Common Questions

Can this transformer be used to power multiple HVAC 24V zone valves?
Yes, with a 75VA output, this unit provides approximately 3.12 Amps at 24Vac, making it suitable for powering multiple zone valves or larger HVACR control systems provided the total load does not exceed the VA rating.

What happens if the secondary circuit shorts out?
The built-in overcurrent protection breaker will trip, de-energizing the secondary side to prevent coil burnout. Once the fault is cleared, simply depress the reset button to restore power.

Does this unit support 208V or 240V primary inputs?
No, the TR75VA001 is specifically wound for a 120V primary voltage. For multi-tap requirements, a different model in the Rib series should be selected.

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.