Run Start Capacitor, Round, 15/10 MFD, 440/370

Contractor-Grade Reliability – Mars 12656 Dual Run Capacitor for Single-Phase Motor Systems

The Mars 12656 Dual Motor Run Capacitor provides stable and efficient performance for HVAC systems utilizing permanent split capacitor (PSC) motors. With a capacitance rating of 15/10 µF and a voltage capacity of 440 VAC, it is engineered to deliver consistent motor support across compressor and fan circuits. Designed for continuous operation under thermal and electrical load, this capacitor is suitable for demanding residential and light commercial HVAC applications.

This component is built with metallized polypropylene film and sealed in an aluminum round can, offering mechanical resilience, dielectric stability, and long operational life in fluctuating environmental conditions. Its dual-capacitor configuration enables support for two independent motor windings from a single compact device.

Technical Advantages

• ✅ Dual Circuit Capability – Supports both fan and compressor motors in a single round housing, reducing component count and streamlining service work.
• ✅ 440V Rated – Handles high-voltage HVAC loads while offering protection against power spikes and heat degradation.
• ✅ Stable Capacitance Output – Maintains rated µF values under cycling and operating stress, preserving motor efficiency and torque balance.
• ✅ Ruggedized Construction – Round aluminum case and rolled edges with sealed terminals for vibration resistance and contamination protection.

Key Specifications

• Capacitance: 15/10 µF (microfarads)
• Voltage Rating: 440 VAC
• Shape: Round
• Dielectric: Metallized polypropylene
• Configuration: Dual motor run (2-in-1)
• Brand: Mars

Installation Guidance

The Mars 12656 capacitor includes clearly marked quick-connect terminals for field wiring. Installation should be completed by a qualified HVAC technician to ensure system compatibility, proper phase alignment, and code compliance. Always verify capacitance and voltage against system requirements prior to installation. The round profile supports direct replacement in most OEM brackets without modification.

Professional Use Case

For HVAC Contractors: The 12656 is ideal for systems requiring compact, dual-capacitor support. It’s particularly effective in condensing units and air handlers using dual PSC motors. Its reliable construction reduces the frequency of field replacements and supports preventative maintenance protocols across residential and light commercial equipment.

Key Features Summary

• ✅ High-Voltage Compatibility – 440 VAC rating ensures resilience under high-load and seasonal extremes.
• ✅ Thermal and Electrical Endurance – Engineered for continuous-duty cycles with minimal µF drift over time.
• ✅ Efficient Dual-Use Format – Combines two capacitor functions into one, saving space and installation time.
• ✅ HVAC-Ready Design – Meets standard industry tolerances for performance-critical motor circuits.

Optimized for Professional Performance

The Mars 12656 Dual Run Capacitor is a specification-grade component trusted by HVAC professionals for maintaining operational efficiency across condenser fan and compressor motor circuits. Its dependable dual-section design and consistent capacitance output make it a critical part of any service technician’s inventory.