US Seals Run Capacitor RD-50-370 – 50 MFD, 370VAC | Pool & Spa Motor Replacement
Maintain Strong, Efficient Operation in High-Demand Pool & Spa Motors
When pool pumps and spa motors run for long cycles under load, a properly sized motor run capacitor is critical for efficiency and motor health. The US Seals RD-50-370 Motor Run Capacitor is engineered to deliver stable electrical capacitance during continuous operation, helping motors run cooler, smoother, and more efficiently. Rated at 50 MFD and 370VAC, this OEM-grade capacitor is a reliable replacement for failing run capacitors in pool pumps, spa motors, and blowers.
A weakened run capacitor can cause excessive amperage draw, overheating, reduced flow, and premature motor failure. Replacing it with the correct capacitor helps protect your investment and restore consistent performance.
Designed for Continuous Pool & Spa Motor Duty
Unlike start capacitors, motor run capacitors stay engaged while the motor is operating. Pool and spa motors—especially higher-horsepower models—depend on stable capacitance to maintain proper phase balance and efficiency. The US Seals RD-50-370 is built specifically for these demands, featuring a durable, moisture-resistant design suited for outdoor pool equipment environments.
This capacitor is commonly used in single-phase pool pump motors, spa motors, and blowers requiring a 50 MFD run capacitor rated at 370VAC.
Why the Correct Run Capacitor Matters
Using the correct motor run capacitor directly impacts motor efficiency, electrical stability, and service life. An incorrect or failing capacitor forces the motor to work harder than intended.
Why it matters:
-
Helps motors run cooler under continuous load
-
Reduces electrical strain and excess amperage draw
-
Prevents overheating, nuisance shutdowns, and motor damage
-
Extends the lifespan of pool and spa motors
OEM-Grade Quality from US Seals
US Seals is a trusted manufacturer of pool equipment components, known for producing dependable electrical parts designed for real-world pool environments. The RD-50-370 motor run capacitor is manufactured to OEM specifications, delivering consistent capacitance output and long-term reliability in residential and light commercial pool systems.
This makes it a dependable choice for professional service technicians and pool owners performing preventative maintenance or repairs.
Compatibility & Common Applications
The US Seals RD-50-370 motor run capacitor is commonly used in:
-
Residential pool pump motors
-
Spa and hot tub motors
-
Pool and spa blowers
-
Single-phase electric motors requiring a 50 MFD, 370VAC run capacitor
Always verify your motor’s required capacitance and voltage rating before installation.
Installation Notes
Disconnect power completely and discharge the capacitor before servicing any motor. Motor run capacitors store electrical energy and must be handled with care. If you are unsure about diagnosing capacitor failure or selecting the correct replacement, professional installation is recommended.
Product Specifications
| Specification | Details |
|---|---|
| Product Name | US Seals Run Capacitor RD-50-370 |
| Capacitance | 50 MFD |
| Voltage Rating | 370 VAC |
| Capacitor Type | Motor Run Capacitor |
| Application | Pool pumps, spa motors, blowers |
| Motor Type | Single-phase |
| Brand | US Seals |
| MPN | RD-50-370 |
Buy with Confidence from Benchmark Pool Supply
When you purchase the US Seals RD-50-370 Motor Run Capacitor from Benchmark Pool Supply, you’re buying from a local pool equipment expert who understands real-world repair scenarios. We stock OEM-grade replacement parts and help ensure you get the correct component the first time.
Our knowledgeable team supports both DIY pool owners and professional service technicians.
