Tecumseh K146-18 Capacitor

The Tecumseh K146-18 Capacitor is a high-duty motor start capacitor engineered for industrial and commercial refrigeration applications. This critical component provides the essential phase-shift and high starting torque required to overcome head pressure and inertia in hermetic compressors and fan motors. Rated for 378-440 MFD (microfarads) at 165V, it is specifically designed for intermittent duty during the startup cycle. As an OEM Tecumseh replacement part, it ensures precise electrical compatibility with specified compressor models, maintaining the original manufacturer’s performance curves. The robust black phenolic housing provides superior insulation and thermal protection, ensuring the component handles the high inrush current typical of HVACR startup sequences. Technicians should verify that the capacitance range and voltage rating meet or exceed the original equipment specifications to prevent motor winding overheating or failure. This kit is a direct replacement for 85PS165C77 and other compatible factory-installed start capacitors.

• High Torque Output: Delivers a consistent 378-440 MFD range to ensure reliable compressor starts under heavy load conditions.
• Proven Compatibility: Designed specifically for Tecumseh refrigeration systems, ensuring seamless integration with existing hard start kits and relays.
• Optimized Electrical Profile: The 165VAC rating is specifically tuned for single-phase motor circuits to reduce startup time and minimize wear on the motor windings.
• Durable Construction: Features a moisture-resistant, non-conductive case ideal for the demanding environments of condensing units.

• Can I use a capacitor with a higher voltage rating? Yes, you can substitute a higher voltage capacitor (e.g., 250V) as long as the MFD rating remains within the 378-440 range, but never use one with a lower voltage rating.
• Is this an intermittent or continuous duty part? This is a start capacitor designed for momentary use (seconds) during motor ignition and must be removed from the circuit by a potential relay once the motor reaches speed.
• How do I know if my current capacitor is failing? Look for signs of "popped" top seals, fluid leakage, or use a multimeter to check if the microfarad reading has fallen below the 378 MFD minimum threshold.

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.