Functional Devices TR50VA004 Transformer

The Functional Devices TR50VA004 Transformer is a heavy-duty 50VA power transformer engineered for multi-tap versatility in commercial and industrial HVAC control circuits. This unit features a versatile primary voltage configuration, supporting 480/277/240/120Vac, with a standard 24Vac secondary output. Built for field flexibility, it utilizes a foot and dual threaded hub mount, allowing for secure installation in electrical knockouts or flat-surface mounting inside control panels. A critical feature for circuit protection is the integrated manual reset circuit breaker, which prevents coil burnout from overcurrent or short circuits. This model serves as the direct replacement for Honeywell AT150B1252, ensuring seamless mechanical and electrical compatibility. For technicians managing 24V control power requirements, the TR50VA004 provides reliable performance and high-tier insulation to handle the thermal demands of continuous-duty applications.

Key Benefits for Technicians:

• Multi-Tap Primary: Supports 120V to 480V transformer configurations, reducing the need to stock multiple SKUs on the service truck.
• Integrated Protection: Features a built-in secondary circuit breaker to safeguard downstream components and the transformer coil.
• Universal Mounting: The dual threaded hub design simplifies installation in standard 1/2-inch electrical knockouts.
• Reliable Output: Provides a consistent 24V step-down transformer performance for contactors, thermostats, and building automation controllers.
• Broad Compatibility: Engineered as a high-performance Class 2 transformer suitable for various mechanical room environments.

Common Installation Questions:

What makes this a suitable AT150B1252 replacement?
The electrical specifications and physical mounting footprint match the legacy Honeywell units, allowing for a drop-in replacement without modifying the existing enclosure.

How does the manual reset circuit breaker function?
If the secondary side experiences an amperage spike or short, the breaker trips to open the circuit. Once the fault is cleared, the technician can manually reset the button to restore 24Vac power.

Can this transformer be used in high-voltage industrial panels?
Yes, with its 480Vac primary tap, it is specifically designed for industrial control transformer applications where high-voltage step-down is required for low-voltage logic.

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.