Run Start Capacitor, Round, 30/7.5 MFD, 440/370

Commercial-Grade Reliability – Mars 12782 Dual Run Capacitor 30/7.5 MFD 440V

The Mars 12782 Dual Motor Run Capacitor is engineered for continuous-duty HVAC service, combining 30 and 7.5 microfarad sections in a single 440V-rated enclosure. Designed to support both compressor and fan motor circuits in residential and light commercial units, it offers dependable start and run performance across a wide range of applications.

Built with metallized polypropylene film and housed in a round aluminum can with industry-standard terminals, the 12782 meets stringent HVAC application requirements for motor operation stability and environmental endurance.

Benefits for HVAC Technicians and System Integrators

• ✅ Dual Capacitance Configuration – Supports dual-motor operation, simplifying wiring layouts and saving space in compact compartments.
• ✅ 370/440 VAC Rating – Suitable for installations requiring elevated voltage tolerance, reducing failure rates due to transient overvoltage.
• ✅ Reliable Film Dielectric – Manufactured using metallized polypropylene film for consistent performance and long operational life.
• ✅ Integrated Safety Mechanism – Features an internal pressure-sensitive interrupter for automatic circuit isolation during failure conditions.
• ✅ Aluminum Case with Reinforced Terminals – Ensures mechanical durability and resistance to corrosion in outdoor environments.

Technical Specifications

• Model: Mars 12782
• Capacitance: 30/7.5 MFD (μF)
• Voltage Rating: 370/440 VAC
• Case Type: Round aluminum enclosure
• Frequency: 50/60 Hz
• Temperature Range: -40°C to +70°C
• Application: Compressor and fan motor in single-phase HVAC systems

Installation Guidelines

All replacements should be performed with the power supply fully isolated. Terminal markings (C, FAN, HERM) must be matched precisely to unit schematics. The use of a capacitor discharge tool and multimeter verification is mandatory prior to connection. Installation by a qualified technician is strongly advised to ensure full compliance with local codes and equipment specifications.

Field Application Notes

For HVAC Contractors:

The 12782 provides a reliable, high-voltage-rated solution for common condenser units requiring 30/7.5 μF combinations. Its compact cylindrical form and standard terminal spacing simplify field swaps and reduce installation time.

Performance Considerations:

• ✅ Thermal Protection: Rated for wide ambient operation (-40°C to 70°C)
• ✅ Voltage Versatility: Dual 370/440V rating covers a broad range of OEM units
• ✅ UL Recognized: Complies with key safety standards for HVAC components

Ensure System Continuity

Equip your HVAC installation or service inventory with the Mars 12782 Dual Run Capacitor for high-reliability operation in compressor-fan motor assemblies. Its robust design and proven dielectric integrity make it a trusted choice across maintenance and new system deployments.