Run Capacitor, Round, 4 MFD, 370 Volt

Mars 12094 – 4 MFD 370V Round Motor Run Capacitor for Single-Phase Applications

The Mars 12094 is a single-value motor run capacitor designed for use in permanent split capacitor (PSC) motors within HVAC and refrigeration systems. With a capacitance rating of 4 microfarads (MFD) and a voltage rating of 370V AC, this component provides continuous-phase shift functionality to improve motor efficiency and performance under load.

Manufactured using metallized polypropylene film and enclosed in a round, hermetically sealed aluminum canister, the 12094 is engineered to withstand environmental stressors including heat, vibration, and moisture. It is suited for use in fan motors, blower motors, and other PSC applications requiring low capacitance and steady output over extended operating cycles.

Key Performance Features

• ✅ Capacitance: 4 MFD – Supports phase angle separation for continuous-duty PSC motor circuits.
• ✅ Voltage Rating: 370V AC – Designed for HVAC systems operating at standard voltage levels.
• ✅ Round Aluminum Housing: Hermetically sealed for environmental protection and durability.
• ✅ Non-PCB Construction: Manufactured to meet current environmental compliance standards.

Technical Specifications

• Model: Mars 12094
• Capacitance: 4 MFD
• Voltage: 370V AC
• Shape: Round
• Type: Motor Run Capacitor (PSC)

Installation Guidelines

Capacitor installation should be performed by a licensed HVAC or electrical technician. Ensure full system de-energization and safe discharge of any previously installed capacitor before handling. Match the replacement capacitor to OEM specifications in both capacitance and voltage ratings.

• ???? Tools: Screwdriver or nut driver for access and mounting
• ???? Diagnostic: Multimeter capable of MFD testing
• ???? PPE: Safety gloves and eyewear; follow LOTO protocols

Terminal lugs should be inspected for wear or corrosion and replaced if needed. Secure the capacitor within its bracket to prevent vibration-related fatigue during operation.

Common Use Cases

The Mars 12094 is commonly deployed in condenser fans, indoor blowers, and fractional-horsepower compressor circuits where a 4 MFD capacitor is specified. Its 370V rating ensures compatibility with systems operating in standard residential and light commercial applications. It serves as a reliable replacement for OEM components and is suitable for maintenance programs or reactive service work.

Contractor-Grade Attributes

• ✅ Reliable Phase Shift Support – Maintains torque and motor efficiency across varied duty cycles.
• ✅ UL Recognized – Compliant with recognized safety and performance standards.
• ✅ Field-Compatible Form Factor – Easily integrates into standard HVAC cabinet configurations.
• ✅ Service Proven Durability – Designed for high-frequency operating environments and replacement cycles.

Professional Summary

The Mars 12094 Motor Run Capacitor provides essential electrical support to PSC motors requiring 4 MFD capacitance at 370V. Its compact round design and proven dielectric materials make it a trusted choice for contractors servicing HVAC systems in residential and commercial installations. Built to maintain motor performance and reduce failure rates, this component is engineered for field reliability and ease of integration.