Rheem-Ruud 43-17075-11 Start Capacitor

The Rheem-Ruud 43-17075-11 Start Capacitor is a high-duty electrical component engineered to provide the necessary torque for compressor and motor startup in residential and commercial HVAC systems. This 145-175 MFD 330VAC start capacitor is a direct OEM replacement designed to meet the strict specifications of Rheem, Ruud, and ProTech equipment. Featuring a round start capacitor form factor, this unit includes a pre-installed bleed resistor, which is critical for discharging residual voltage and protecting the starting relay contacts from welding or pitting. When diagnosing a single-phase motor that fails to initiate under load, replacing the HVAC start capacitor with this high-capacitance unit ensures the compressor reaches operating speed quickly, reducing heat buildup and mechanical stress during the high-inrush current phase.

Technical Benefits for Contractors

• Optimized Starting Torque: The 145-175 microfarad rating provides the high-surge capacity required for high-rebound compressors and heat pumps.
• Integrated Safety: Includes a factory-installed bleed resistor to prevent arcing and extend the life of the potential relay or centrifugal switch.
• Broad Compatibility: Serves as a primary Rheem replacement part for diverse air conditioning and refrigeration applications requiring a 330V rating.
• Durable Construction: Designed to withstand the rapid cycling and harsh ambient temperatures found in outdoor condensing units.

Common Questions

Can I use a 330VAC capacitor to replace a lower voltage unit?
Yes, a 330VAC start capacitor can safely replace a 110V, 220V, or 250V unit, as long as the capacitance (MFD) range matches the motor manufacturer’s requirements.

What is the purpose of the bleed resistor on this model?
The bleed resistor is a critical safety and performance feature that drains the stored electrical charge after the capacitor is dropped out of the circuit, protecting the start relay from premature failure.

When should this 145-175 MFD capacitor be replaced?
Technicians should replace the capacitor if the casing shows signs of bulging, oil leakage, or if testing with a multimeter shows a reading outside the 145-175 microfarad tolerance. Failure to replace a weak capacitor can lead to locked rotor amps (LRA) issues and compressor failure.

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.