Capacitor, Dual Run, 40/5 uF, 440 Volt VAC, Round

Lennox by Mars® 89M77 Dual Run Capacitor – 40/5 MFD, 440V AC, Round The Lennox 89M77 is a dual motor run capacitor designed to support both the compressor and condenser fan motor in HVAC systems utilizing permanent split capacitor (PSC) motors. This round-style capacitor delivers 40/5 microfarads (MFD) at 440 volts AC and is built to meet Lennox OEM requirements. Constructed with metallized polypropylene film dielectric and enclosed in a corrosion-resistant aluminum case, the 89M77 features a pressure-sensitive interrupter for fault protection and standard ¼" male quick-connect terminals for efficient replacement in field service applications. Technical Specifications: OEM Part Number: 89M77 Capacitance: 40/5 MFD (μF) Voltage Rating: 440V AC Shape: Round Configuration: Dual run Terminals: ¼" male quick-connect Dielectric: Metallized polypropylene film Case Material: Aluminum Safety Feature: Internal pressure-sensitive interrupter Operating Temp Range: -40°C to +70°C Certification: UL 810 compliant Application Overview: Designed for use in Lennox air conditioning or heat pump systems. Suitable for dual motor PSC circuits requiring a 40/5 MFD, 440V capacitor. Commonly used in residential and light commercial HVAC units where OEM specifications apply. Provides continuous-duty performance in dual-capacitance applications supporting both compressor and fan circuits. Installation Guidelines: De-energize system and fully discharge existing capacitor before handling. Confirm that voltage and microfarad values match equipment specifications. Use terminal labels (C, FAN, HERM) for proper wiring connections. Secure the capacitor to minimize vibration and exposure to moisture. Installation must conform to all applicable codes and manufacturer instructions. Licensed technician installation is recommended. The 89M77 is engineered for direct compatibility with Lennox systems, providing reliable support for dual-motor operation in PSC-based HVAC applications. Its OEM-grade construction and electrical rating ensure consistent performance in high-demand environments.