Johnson Controls Y65S13-0 Transformer

The Johnson Controls Y65S13-0 Transformer is a rugged, Class 2 control transformer designed for reliable power stepping in demanding 24 VAC HVAC/R applications. Engineered with a split-bobbin design, this unit ensures superior isolation between the primary and secondary windings, providing enhanced safety and performance for digital controllers, ignition systems, and motor actuators. With a 40VA rating and a multi-tap primary accommodating both 208V and 240V inputs, it offers regional flexibility and simplifies inventory for service contractors.

This foot mount transformer features an open-frame construction, making it an ideal choice for internal panel installations where end bells are not required. It comes equipped with color-coded lead wires?8-inch leads on the primary side and 30-inch leads on the secondary?allowing for standardized, efficient field wiring. Built for durability, it operates within a wide temperature range of -40?F to 104?F, ensuring stable 24V secondary output even in unconditioned equipment spaces.

Key Benefits

• Versatile Primary Taps: Supports 208/240 VAC inputs, making it compatible with most standard commercial and residential heating and cooling systems.
• Superior Isolation: The split-bobbin construction minimizes the risk of arc-over and improves overall system reliability.
• Standardized Installation: Foot mount base and extended color-coded leads reduce labor time during emergency replacements.
• Energy Limiting Protection: Specifically designed to meet UL 1585 standards for industry-compliant safety in control circuits.
• Compact Footprint: Open-frame design fits easily into tight control cabinets and air handler compartments.

Common Questions

What is the maximum load this transformer can handle?
The Y65S13-0 is rated for 40VA. Ensure your total secondary circuit draw?including contactors, boards, and thermostats?does not exceed this limit to prevent overheating.

Can I use this to replace a 50VA transformer?
No. You should always match or exceed the VA rating of the original part. Replacing a 50VA unit with this 40VA model will lead to premature failure under load.

How do I identify the primary leads?
Refer to the wiring diagram on the housing. Typically, the 208/240V primary uses color-coded leads (often Black/Red/Orange) while the 24V secondary uses separate leads (usually Blue/Yellow or Brown).

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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.