Run Start Capacitor, Round, 75/10 MFD, 440/370

Mars 12935 – Dual Motor Run Capacitor for High-Demand HVAC Applications

The Mars 12935 is a dual-rated motor run capacitor engineered for continuous-duty service in HVAC systems utilizing permanent split capacitor (PSC) motors. With capacitance ratings of 75/10 microfarads (MFD) and a voltage rating of 440V AC, this round-profile capacitor is designed to support both compressor and fan motor circuits within a single enclosure. It is suitable for replacements in residential and commercial air conditioning units requiring dual-capacitor functionality.

Constructed with metallized polypropylene film and housed in a sealed aluminum canister, the Mars 12935 is designed to maintain electrical stability in high-cycle, high-temperature service environments. It is part of the Mars JARD series, recognized in the trade for its reliability in both field and OEM applications.

Performance Attributes for Field Use

• ✅ Dual Capacitance Support – Delivers 75 MFD for compressor start/run and 10 MFD for fan motor applications.
• ✅ Rated for 440V AC – Suitable for systems with high voltage operation and transient voltage spikes.
• ✅ Hermetically Sealed Round Case – Aluminum housing offers protection against moisture, vibration, and corrosion.
• ✅ Oil-Free Construction – Reduces risk of leakage and extends product life in vertical or horizontal installations.

Technical Specifications

• Model: Mars 12935
• Capacitance: 75/10 MFD
• Voltage Rating: 440V AC
• Type: Dual Motor Run Capacitor
• Shape: Round
• Series: JARD

Installation Requirements

Installation should be completed by licensed HVAC technicians in accordance with equipment specifications and applicable electrical codes. Disconnect all power sources and properly discharge old capacitors prior to removal. Match capacitance and voltage ratings precisely to avoid equipment malfunction.

• ???? Standard hand tools for bracket and panel removal
• ???? Multimeter with MFD test capability for pre- and post-installation verification
• ???? Personal protective equipment and adherence to lockout/tagout protocols

Ensure terminal fitment is tight and corrosion-free. Use dielectric grease where appropriate and secure the unit to avoid movement from vibration during operation.

Application Overview

The Mars 12935 is commonly specified for air conditioning condensers and heat pump systems where a shared capacitor is needed for both compressor and fan motor. It supports motor torque consistency, improves startup reliability, and helps maintain energy-efficient operation. This unit is ideal for service replacements, retrofits, and system rebuilds where high capacitance and voltage resilience are required.

Contractor-Focused Benefits

• ✅ High Capacitance Load – Suitable for demanding motor applications with dual circuit requirements.
• ✅ Voltage Stability – Designed for systems exposed to voltage fluctuations or extended runtimes.
• ✅ Space-Efficient Form Factor – Round configuration enables easy integration into standard HVAC cabinets.
• ✅ Industry-Proven Reliability – Manufactured for consistent field performance under peak seasonal loads.

Summary for Professional Use

The Mars 12935 dual motor run capacitor offers stable, dual-capacitance output for PSC motor systems requiring high-starting torque and consistent performance. Its 75/10 MFD dual rating and 440V capacity make it a preferred solution for HVAC professionals servicing condenser and air handler equipment in residential or light commercial settings. Built to exceed field expectations, this capacitor ensures operational efficiency, motor longevity, and service reliability.