Capacitor, Dual Run, 45/5 uF, 440 Volt VAC, Round

Lennox by Mars® 89M80 – 45/5 MFD Dual Run Capacitor for HVAC Applications

The Lennox 89M80 is a dual-value motor run capacitor engineered for use in HVAC systems utilizing permanent split capacitor (PSC) motors. Rated at 45/5 microfarads (MFD) with a voltage capacity of 440V AC, this round-profile capacitor supports simultaneous operation of both compressor and fan motors, making it suitable for use in residential and light commercial air conditioning units.

This component is constructed with metallized polypropylene film and housed in a sealed aluminum canister for moisture and corrosion resistance. Designed for high-cycle applications, the 89M80 offers consistent dielectric performance and long service life under continuous load conditions.

Performance Features for Professional Use

• ✅ Dual Capacitance Design – Supplies 45 MFD for compressor motor and 5 MFD for condenser fan motor from a single unit.
• ✅ Rated for 440V AC – Suitable for systems requiring higher voltage protection and resistance to voltage spikes.
• ✅ Hermetically Sealed Aluminum Housing – Protects against environmental exposure, vibration, and electrical fatigue.
• ✅ Non-PCB Construction – Complies with environmental regulations for safe installation and disposal.

Technical Specifications

• Brand: Lennox by Mars®
• Model Number: 89M80
• Capacitance: 45/5 MFD
• Voltage Rating: 440V AC
• Type: Dual Motor Run Capacitor
• Shape: Round

Installation Requirements

This capacitor must be installed by a qualified HVAC technician. Disconnect system power before service and ensure all safety protocols are followed, including discharge of any previously installed capacitor. Match both capacitance and voltage ratings with the original equipment specifications to avoid equipment failure.

• ???? Tools: Screwdriver, nut driver, multimeter with MFD test capability
• ???? PPE: Insulated gloves, safety eyewear
• ⚠️ Procedure: Follow lockout/tagout standards and confirm proper terminal identification

Secure the capacitor in place using the approved mounting bracket. Ensure that terminal connections are tight and free from corrosion to maintain electrical integrity over time.

Application Context

The 89M80 is commonly installed in split-system condensers and package units that utilize shared motor capacitor assemblies. It is compatible with Lennox equipment and other systems requiring dual-value capacitor configurations. This unit is especially applicable where OEM replacement with identical form factor and electrical characteristics is essential to restoring system performance.

Benefits for HVAC Contractors

• ✅ Field-Trusted Build – Manufactured under Mars' quality standards for use in professional service environments.
• ✅ OEM Specification Match – Designed to meet original Lennox requirements for capacitance, voltage, and fitment.
• ✅ Reduces Stock Complexity – Dual-value configuration reduces the need for stocking separate capacitors for fan and compressor circuits.
• ✅ Suitable for High-Demand Installations – Ideal for equipment subjected to frequent start cycles and extended runtime.

Professional Summary

The Lennox 89M80 dual motor run capacitor is designed to provide long-lasting electrical stability in PSC motor circuits. Its 45/5 MFD dual-rating, 440V tolerance, and sealed construction make it a preferred solution for field service technicians performing capacitor replacement, system commissioning, or OEM-compliant upgrades in Lennox HVAC units and other compatible systems.