Tecumseh K146-58 Start Capacitor

The Tecumseh K146-58 is a professional-grade start capacitor engineered to provide the high-torque surge required for single-phase motor ignition in HVACR systems. Featuring a capacitance rating of 243-292 MFD and a 165V capacity, this component is essential for initiating the startup cycle of hermetic compressors and refrigeration motors. By delivering a temporary phase shift, the K146-58 reduces the duration of high inrush current, protecting internal windings from excessive heat and mechanical stress during the critical start-up phase.

Designed for integration into condensing units and heat pump systems, this round start capacitor utilizes a rugged housing to maintain stable electrical properties in demanding mechanical rooms. Contractors frequently specify the Tecumseh K146-58 as a reliable OEM replacement part for systems requiring precise 243-292 microfarad displacement to overcome high head pressure. This unit ensures consistent rotor acceleration, helping maintain the operational efficiency of fractional horsepower compressors in commercial and residential refrigeration applications.

• Optimized Torque: Delivers precise 243-292 MFD to ensure reliable motor starting under heavy load conditions.
• Voltage Stability: Rated for 165 VAC to handle standard line voltage fluctuations in refrigeration circuits.
• System Protection: Minimizes the duration of electrical stress on compressor motor windings to prevent premature burnout.
• OEM Compatibility: Exact electrical match for Tecumseh HVAC parts, ensuring drop-in replacement without circuit modification.

What causes a start capacitor like the K146-58 to fail?
Failure is typically caused by high ambient temperatures, excessive cycling, or a faulty potential relay that keeps the capacitor in the circuit too long after the motor has reached operating speed.

Can I use a capacitor with a higher voltage rating?
Yes, you can substitute a higher voltage unit (e.g., 250V) as long as the MFD range remains 243-292, but you should never use a capacitor with a lower voltage rating than 165V.

How do I verify if my K146-58 needs replacement?
Check for physical signs of failure such as bulging or leaking oil, and use a multimeter to confirm the capacitance measures within the specified 243-292 MFD tolerance.

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.