Marley Engineered Products 5814-0003-002 Transformer

The Marley Engineered Products 5814-0003-002 Transformer is a heavy-duty 480V to 24V step-down transformer designed for critical electrical induction and control circuit applications. This 40VA control transformer is a standard-issue component for technical professionals managing 480V primary power distribution in commercial and industrial HVACR environments. Built with a rugged open enclosure, it provides high-precision reduction for low-voltage HVAC control power, ensuring reliable signal delivery to contactors, relays, and thermostats.

This 50/60 Hz unit is a direct replacement part for several QMark and Berko MUH heater series, including MUH0341, MUH0541, and higher-capacity MUH404 and MUH504 models. The electrically isolated windings facilitate safe voltage stepped transformation, protecting downstream 24V secondary components from primary line interference. Its compact footprint and OEM technical specifications allow for seamless integration into existing control cabinets without requiring structural modifications. When dealing with high-voltage industrial heating equipment, this transformer provides the necessary 40VA capacity to sustain steady operation of control logic and safety interlocks.

Key Benefits:

• Optimized Compatibility: Designed specifically for use with QMark MUH series unit heaters and industrial machinery control systems.
• High Isolation Design: Features isolated primary and secondary windings to mitigate electrical hazards and protect low-voltage circuitry.
• Dual Frequency Operation: Engineered for both 50Hz and 60Hz power supplies, providing versatility for various industrial grid configurations.
• Reliable Load Handling: Rated at 40VA to provide consistent 24V secondary output from a standard 480V primary source.

Common Questions:

What unit heaters are compatible with this transformer?
This part is a direct technical match for numerous Marley, Berko, and QMark MUH series heaters, as well as several PRH and DH series industrial units.

Can this transformer be used in 480V 3-phase systems?
Yes, it is designed to tap into 480V primary power to provide 24V secondary control power, common in three-phase industrial equipment setups.

What happens if the VA load exceeds 40VA?
Exceeding the 40VA rating can lead to overheating and voltage drops; always calculate the total amperage draw of your connected relays and controls to ensure they stay within the 1.6rd amp threshold at 24V.

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.