The Lennox HCKY125V440365Z Capacitor (part number 19J20) is a 12.5 microfarad (uF) run capacitor rated for 440 Volts AC and compatible with 50/60Hz systems. Designed to deliver continuous power to motors in residential and light commercial HVAC systems, this capacitor ensures efficient and reliable operation?specifically tailored for use in units like the 4TTR4060N1000BA. Key Features 12.5uF run capacitor for continuous-duty motor support Rated at 440VAC, suitable for high-performance HVAC systems Operates on 50/60Hz electrical grids OEM-quality replacement for Lennox systems Helps maintain energy-efficient and stable motor operation Specifications Capacitor Type: Run Capacitance: 12.5 µF Voltage Rating: 440V Frequency: 50/60Hz Part Numbers: HCKY125V440365Z, 19J20 Application: HVAC fan or compressor motor support Compatible Models Fits popular Lennox model: 4TTR4060N1000BA Why Choose This Item Choose the Lennox 12.5uF 440V run capacitor for reliable and energy-efficient motor performance in your HVAC system. With OEM-grade compatibility and durable construction, this capacitor helps extend equipment life, ensure consistent cooling, and reduce the risk of unexpected system failures.