Functional Devices TR40VA013 Transformer

The Functional Devices TR40VA013 is a multi-tap 40VA control transformer engineered for versatility in demanding HVACR and industrial automation environments. This step-down transformer features primary voltage taps for 480/277/240/208Vac, converting line power to a stable 120Vac secondary output. Built for durability, it includes an integrated circuit breaker for reliable overcurrent protection, eliminating the need for external fusing in many control circuit applications. The dual mounting configuration—utilizing a foot mount or a single threaded hub—allows for seamless installation into standard knockouts or directly onto backpanels. This multi-tap transformer is an essential component for technicians requiring a robust Class 2 power supply capable of handling fluctuating input voltages while maintaining steady performance for relays, contactors, and digital controllers. Its compact design ensures a clean fit within crowded electrical control panels without sacrificing thermal dissipation or electrical integrity.

Key Benefits for Technicians:

• Universal Multi-Tap Input: Supports 208, 240, 277, and 480Vac, reducing the number of spare parts needed on the service truck.
• Integrated Overcurrent Protection: Features a built-in circuit breaker to protect downstream control components from short circuits.
• Flexible Installation: Dual-mount design with a 1/2-inch NPT threaded hub and steady foot mount for various enclosure types.
• High Dielectric Strength: Designed to withstand voltage spikes and harsh electrical noise common in industrial power grids.
• Stable 120V Output: Provides consistent secondary voltage for sensitive HVACR logic boards and solenoid coils.

Frequently Asked Questions:

How do I wire the TR40VA013 for a 480V primary application?
Connect the 480V line to the specific 480Vac lead filament and the common lead. Ensure any unused primary taps are properly capped and insulated to prevent shorting against the enclosure.

What is the maximum amperage load for this 40VA 120V transformer?
At a 120Vac secondary output, this 40VA rated transformer provides approximately 0.33 Amps of continuous current. Always calculate the total VA draw of your contactors and relays to ensure it does not exceed this threshold.

Can this transformer be mounted outside of an electrical junction box?
The TR40VA013 is designed with a threaded hub allowing it to be mounted through a standard knockout, keeping the high-voltage connections safely inside the enclosure while the transformer body remains accessible.

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.