US Seal Run Capacitor RD-35-370 – 35 MFD, 370VAC | PRC35M
Keep Your Pool Pump Performing at Its Best
A failing capacitor is one of the most common causes of weak or non-functioning pool pumps and spa motors. The US Seal RD-35-370 Motor Run Capacitor – 35 MFD, 370VAC (PRC35M) is a reliable replacement designed to restore consistent performance to your pump motor. Built with moisture-sealed, corrosion-resistant construction, this capacitor ensures long-lasting durability even in harsh poolside environments.
Trusted by pool professionals nationwide, US Seal capacitors are OEM-compatible, cost-effective, and built to deliver dependable electrical support. If your pool pump is struggling, buzzing, or shutting down prematurely, replacing the run capacitor is often the fix you need.
Why Replace a Run Capacitor?
A run capacitor provides continuous electrical regulation while your motor is operating. Unlike a start capacitor that only helps at startup, a run capacitor works the entire time the motor is running.
Signs your current capacitor may be failing:
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Motor hums but runs weakly
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Pump shuts down unexpectedly due to overheating
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Water circulation is sluggish or inconsistent
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Energy costs increase without explanation
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Capacitor casing looks swollen or leaking
The RD-35-370 ensures your motor runs at the correct speed and efficiency, protecting your investment and keeping your pool water properly circulated.
Key Features & Benefits
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Electrical Rating: 35 MFD, 370VAC
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Durable Design: Moisture-sealed to resist poolside conditions
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Corrosion-Resistant: Long life in outdoor, humid environments
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OEM-Compatible: Works with major brands including AO Smith, Century, Emerson, and more
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Reliable Performance: Supports motors continuously for smooth operation
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Cost-Effective Solution: Prevents expensive motor replacement
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Compact Fit: Standard cylindrical housing for easy installation
Common Applications
The US Seal RD-35-370 is ideal for:
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Pool Pumps – Reliable circulation for crystal-clear water
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Spa Motors – Consistent power for spa jets and blowers
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Boosters & Auxiliary Pumps – Steady support for pressure-side cleaners and secondary systems
⚠️ Always confirm your existing capacitor’s microfarad (MFD) rating matches exactly. The voltage rating can be equal or higher, but never lower.
Simple Installation
Replacing a capacitor is a straightforward job for most pool owners and technicians:
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Turn Off Power – Shut off the breaker to ensure safety.
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Open Motor Housing – Remove the cover to access the old capacitor.
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Discharge Safely – Use an insulated screwdriver to discharge any stored electricity.
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Note Wiring Setup – Take a picture before disconnecting the wires.
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Swap in the RD-35-370 – Connect wires to the same terminals on the new capacitor.
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Reassemble & Test – Restore power and confirm smooth motor operation.
⚠️ If you’re not experienced with electrical parts, always consult a professional.
Long-Term Value
At just $37.95, the RD-35-370 is an affordable fix that can save you hundreds of dollars:
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Extends the lifespan of your pump motor
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Reduces stress on other components
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Helps keep energy bills under control
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Ensures consistent pool water clarity
Compared to replacing a motor or pump, swapping a capacitor is quick, inexpensive, and highly effective.
Product Specifications
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Manufacturer: US Seal
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Model: RD-35-370 (PRC35M)
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Type: Motor Run Capacitor
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Rating: 35 MFD, 370VAC
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Shape: Cylindrical, moisture-sealed
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Applications: Pool pumps, spa motors, blowers
Why Buy from Benchmark Pool Supply?
At Benchmark Pool Supply, we specialize in supplying high-quality pool parts at competitive prices. Here’s why customers trust us:
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Genuine US Seal capacitors in stock and ready to ship
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Fast delivery to minimize pool downtime
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Expert support to help match you with the right part
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A proven track record of serving pool professionals and homeowners
We take the guesswork out of pool part replacement so you can focus on enjoying clear, healthy water.
FAQs About the RD-35-370 Run Capacitor
Q: Can I use a 440VAC capacitor instead of this 370VAC model?
A: Yes, a higher voltage capacitor is acceptable. The MFD rating (35) must match exactly.
Q: What happens if my run capacitor fails completely?
A: Your pump motor may stop running altogether, risking water quality and potentially damaging the motor.
Q: How long does a run capacitor usually last?
A: Typically 5–7 years, though lifespan varies by usage and environmental exposure.
Q: Is this capacitor waterproof?
A: It is moisture-sealed and corrosion-resistant but should remain within the motor housing, not submerged.
Q: Can this be used in saltwater pools?
A: Yes. Its sealed design makes it compatible with both freshwater and saltwater pool environments.
