MARS 11952 Start Capacitor

The MARS 11952 Start Capacitor is a high-duty round motor start capacitor engineered for single-phase HVACR and industrial motor applications requiring high starting torque. Operating within a capacitance range of 216–259 microfarads (MFD) and rated for 220/250VAC at 50/60 Hz, this component is essential for providing the initial electrical surge needed to cycle larger compressors and blower motors into operation. As a direct replacement for PTMJ216 and TITAN HD models, the 11952 ensures broad compatibility across major mechanical systems.

Encased in a rugged phenolic resin case (black bakelite), this unit is moisture and oil-resistant, protecting internal electrolytic components from the harsh environments of condenser cabinets. With an operating temperature range of -40°C to +65°C and standard 1/4" quick-connect terminals, it offers a reliable field solution for technicians performing routine service or complex repairs where compact dimensions (3.375" height x 1.812" width) are critical for fitment in tight control boxes.

Key Benefits for Technicians:

• Direct Cross-Reference Compatibility: Serves as a PTMJ216 replacement and is interchangeable with many universal 250V start capacitors.
• Industrial Build Quality: The phenolic case provides superior durability against heat and humidity compared to standard plastic alternatives.
• Enhanced Motor Performance: Specifically designed to increase starting torque, reducing the mechanical stress on motor windings during the startup phase.
• Universal Application: Compatible with residential and commercial HVAC units, water pumps, and gear motors utilizing 216-259 MFD specifications.

Common Questions:

Is the MARS 11952 compatible with 208V systems?
Yes, its 220/250VAC rating makes it suitable for standard 208V and 230V single-phase motor circuits. Always verify the required microfarad (MFD) range of the specific motor before installation.

Can I use this to replace a capacitor with a higher voltage rating?
Technically, you can replace a capacitor with one of a higher voltage rating, but you must never replace a capacitor with one of a lower voltage rating than the original OEM specification. Ensure the 216-259 MFD range matches your requirements.

What does the phenolic case offer over plastic?
The phenolic material is effectively a non-conductive, heat-resistant shell that prevents external oil and grease from contaminating the electrolytic fluid, extending the service life of the component in demanding HVACR applications.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.