Johnson Controls Y63T22-0 Transformer

The Johnson Controls Y63T22-0 is a high-performance Class 2 control transformer engineered for the rigorous demands of 24 VAC control systems. With a robust 50 VA rating, this multi-tap unit is indispensable for powering HVACR digital controllers, gas ignition systems, and motor actuators. The multi-tap primary allows for maximum field flexibility, supporting 120/208/240 V inputs through standardized color-coded leads, which reduces truck stock requirements for service contractors. Designed with a split-bobbin construction, the Y63T22-0 ensures superior electrical isolation between the primary and secondary windings to maintain signal integrity in sensitive building automation systems.

For enhanced system safety, this transformer features an integrated manual reset circuit breaker, providing critical overcurrent protection to the 24V secondary circuit. The hardware includes a 4" x 4" mounting plate and an end bell hole configuration with 8-inch primary and secondary leads for clean, secure wire routing. Whether you are replacing a failed 24V step-down transformer or performing a new installation in a residential or commercial control cabinet, the Y63T22-0 provides the steady-state power and UL 1585 compliance required for professional-grade HVAC applications.

• Universal Input Compatibility: Supports 120V, 208V, and 240V primary voltages, making it a versatile multi-tap transformer for diverse job sites.
• Enhanced Circuit Protection: The built-in circuit breaker prevents permanent damage to downstream controls during a short circuit or overload.
• Efficient Integration: Features a 4x4 plate mount and 8-inch leads for easy installation in standard junction boxes or control panels.
• Isolation Reliability: Split-bobbin design minimizes the risk of arc-over and ensures long-term performance in high-duty cycle environments.

What happens if the transformer secondary is overloaded?
The integrated circuit breaker will trip to protect the 24 VAC secondary winding. Once the fault is cleared, the breaker can be reset to restore power to the control circuit.

How do I identify the correct primary taps for a 208V or 240V installation?
The Johnson Controls Y63T22-0 uses industry-standard color-coded lead wires. Technicians should refer to the wiring diagram on the housing to match the specific primary voltage tap to the incoming line power.

Can this transformer be used for Class 2 circuits?
Yes, this is a UL Listed Class 2 transformer, meeting UL 1585 standards for energy-limited applications, ensuring it is suitable for thermostats and other low-voltage HVACR equipment.

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.