X
  • No products in the list

Run Capacitor

We offer high-quality run capacitors, designed to improve the power factor and efficiency of AC motors. These capacitors help to reduce energy consumption and extend the lifespan of the motor. Our run capacitors are available in various capacitance and voltage ratings to suit a wide range of applications.

Get Run Capacitors to Delight Your Customers

Delight your customers with our high-quality run capacitors. Designed to enhance the performance and efficiency of AC motors, our capacitors deliver reliable and long-lasting operation. By improving power factor and reducing energy consumption, our capacitors help your customers save money and reduce their environmental impact.

dual run capacitor

dual run capacitor

A dual run capacitor is a versatile component that combines the functions of a start capacitor and a run capacitor into a single unit. It’s commonly used in air conditioning and heating systems to improve motor performance and efficiency.

How it Works:

  1. Starting Capacitor: When the system starts, the higher capacitance value (e.g., 45 µF in a 45/5 capacitor) provides a surge of current to help the motor overcome its initial starting resistance.
  2. Running Capacitor: Once the motor is running, the lower capacitance value (e.g., 5 µF) improves the motor’s power factor, leading to more efficient operation.

Start Run Capacitor

A start-run capacitor is a type of capacitor used in single-phase AC motors to help them start and run efficiently. It’s a dual-purpose capacitor that combines the functions of both a start capacitor and a run capacitor.

How it Works:

  • Starting: When the motor is initially powered on, the higher capacitance value of the start-run capacitor provides a significant surge of current to the motor’s winding. This initial boost helps the motor overcome its starting inertia and begin to rotate.
  • Running: Once the motor is running, the lower capacitance value of the capacitor is used to improve the motor’s power factor. This leads to more efficient operation, reduced energy consumption, and smoother performance.
start run capacitor
round dual run capacitor

round dual run capacitor

We offer high-quality round dual-run capacitors designed to improve the performance and efficiency of AC motors. Our capacitors are built to rigorous standards, ensuring reliability and durability in demanding applications.

wiring run capacitor

wiring run capacitor

We offer high-quality wiring run capacitors, designed to improve the power factor and efficiency of AC motors. These capacitors help to reduce energy consumption and extend the lifespan of the motor. Our wiring run capacitors are available in various capacitance and voltage ratings to suit a wide range of applications.

dual run capacitor 45 5

45 5 dual run capacitor

We offer high-quality 45/5 dual-run capacitors, designed to enhance the performance and efficiency of AC motors. These capacitors are essential for reliable starts and smooth operation of air conditioning systems, compressors, and other motor-driven appliances. Our capacitors are built to rigorous standards, ensuring long-lasting performance and durability.

dual run capacitor 35 5

dual run capacitor 35 5

We offer high-quality 35/5 dual run capacitors, ideal for various electronic applications. These capacitors are designed to improve the efficiency and performance of AC motors. Our capacitors are built to rigorous standards, ensuring reliability and durability in harsh environments.

single run capacitor

single run capacitor

We provide high-quality single run capacitors, designed to improve the power factor and efficiency of AC motors. These capacitors help to reduce energy consumption and extend the lifespan of the motor. Our single run capacitors are available in various capacitance and voltage ratings to suit a wide range of applications.

5 mfd run capacitor

MFD run capacitor

We are a leading manufacturer of high-quality MFD run capacitors. Our capacitors are designed to meet the demanding needs of various electronic applications, including motors, compressors, and fans. We offer a wide range of capacitance values and voltage ratings to suit your specific requirements. Our capacitors are built to the highest standards of quality and reliability, ensuring long-lasting performance and efficiency.

heat pump run capacitor

heat pump run capacitor

We specialize in manufacturing high-quality run capacitors for heat pumps. Our products are designed to enhance the efficiency and reliability of your heating and cooling systems. Contact us today to learn more about our capacitor solutions.

oval run capacitor

oval run capacitor

We specialize in manufacturing premium oval run capacitors. Our capacitors are designed to deliver exceptional performance and reliability, making them ideal for a wide range of electronic applications.

20uf run capacitor

20 microfarad run capacitor

20 microfarad run capacitors are essential components in various electronic applications, particularly in motor-driven systems. They help improve motor performance by providing the necessary phase shift for efficient operation. These capacitors are designed to withstand continuous operation and are available in different voltage ratings to suit specific requirements.

35 mfd run capacitor

35/5 mfd 370 volt dual round run capacitor

We supply high-quality 35+5 mfd 370 v round run capacitor for various applications, including HVAC systems and motors. Our capacitors offer reliable performance and durability, ensuring optimal operation of your equipment.

dual run capacitor 60:5

dual run capacitor 60/5

We supply high-quality Dual Run Capacitors rated for 60/5 microfarads. Perfect for various electronic applications, our capacitors offer reliable performance and durability. Contact us today to learn more about our product range and pricing.

50uf run capacitor

50/5 run capacitor

50/5 run capacitors are essential components in single-phase AC motors, commonly found in appliances like fans, pumps, and compressors. They provide the necessary phase shift to ensure smooth and efficient motor operation. As an electronic manufacturer specializing in these capacitors, we offer a wide range of products tailored to various motor applications. 

heavy duty run capacitor

heavy duty run capacitor

We specialize in manufacturing high-quality, heavy-duty run capacitors designed to withstand demanding applications. Our capacitors offer reliable performance, durability, and long service life, making them ideal for industrial and commercial use.

Why Choose Our Run Capacitors

Superior Performance:

  • Efficient Operation: Our capacitors are engineered to improve motor efficiency, reducing energy consumption and operating costs.
  • Reliable Performance: Constructed with premium materials, our capacitors ensure consistent and reliable performance, minimizing downtime and maintenance costs.
  • Extended Motor Lifespan: By optimizing motor performance, our capacitors can help extend the lifespan of your equipment.

Wide Range of Options:

  • Custom Solutions: We can provide custom capacitor solutions tailored to your specific requirements, ensuring optimal performance for your application.
  • Standard Options: Our extensive inventory includes a wide range of standard capacitor sizes and ratings, allowing you to find the right product for your needs.

Enhanced Durability:

  • Robust Construction: Our capacitors are built to withstand harsh operating conditions, including extreme temperatures, vibration, and humidity.
  • Durable Design: We use advanced manufacturing techniques and high-quality materials to ensure the longevity of our products.

Safety and Compliance:

  • Safety Standards: Our capacitors are manufactured in compliance with stringent safety standards, ensuring safe operation and reducing the risk of electrical hazards.
  • Regulatory Compliance: We adhere to relevant industry regulations and certifications, providing peace of mind and ensuring compliance with local and international standards.

Run Capacitor FAQs

What is a run capactor?

A run capacitor is a type of capacitor used in single-phase alternating-current (AC) induction motors to improve their performance. It helps create a rotating magnetic field within the motor, ensuring smooth and efficient operation.

A dual run capacitor is a type of capacitor that combines the functions of a start capacitor and a run capacitor into a single unit. It is commonly used in air conditioners and other HVAC systems to improve the performance and efficiency of the compressor and fan motors.

Here’s how it works:

  • Start Capacitor: Provides a surge of power to the motor to help it start up quickly and efficiently.
  • Run Capacitor: Supplies a continuous current to the motor to maintain its operation and improve its power factor.

By combining these two functions into one component, a dual run capacitor simplifies the design of HVAC systems and reduces the number of components required. This can lead to cost savings and improved reliability.

A run capacitor is a type of capacitor used in single-phase AC induction motors to improve their performance. It helps create a rotating magnetic field within the motor, ensuring smooth and efficient operation.

Here are some ways to identify a run capacitor:

1. Physical Appearance:

  • Size: Run capacitors are typically smaller than start capacitors.
  • Shape: They often have a cylindrical or oval shape.
  • Labeling: Look for labels indicating the capacitor’s capacitance (measured in microfarads, or µF) and voltage rating. Run capacitors usually have a lower capacitance rating than start capacitors.

2. Location:

  • Motor Housing: Run capacitors are often mounted directly on the motor housing, usually near the terminal box.
  • Control Panel: In some cases, they might be located inside the control panel of the appliance.

3. Connection:

  • Permanent Connection: Run capacitors are permanently connected to the motor winding and are not switched on and off.

4. Capacitance Rating:

  • Lower Capacitance: Run capacitors typically have a lower capacitance rating compared to start capacitors. This is because they are designed to provide a continuous current to the motor, rather than a short burst of power.

Additional Tips:

  • Consult the Manufacturer‘s Manual: The manual for your appliance or motor should provide specific information about the type of capacitor used and its location.
  • Consult a Professional: If you are unsure about identifying or replacing a capacitor, it is best to consult a qualified technician.

Remember, always handle capacitors with caution. They can store a significant amount of electrical energy, even when disconnected from the power source.

Replacing a capacitor can be dangerous if not done correctly. If you’re unsure about any step, please consult our qualified electrician.

Here’s a general guide on how to replace a run capacitor:

Safety First:

  1. Power Off: Always turn off the power to the unit you’re working on. This could be a circuit breaker or disconnecting the unit from the power source.
  2. Discharge the Capacitor: Even after powering off, a capacitor can still hold a charge. Discharge it safely using a screwdriver with an insulated handle. Short the terminals together briefly to release the stored energy.

Replacement Process:

  1. Locate the Capacitor: Find the old run capacitor, usually mounted on the motor or nearby.
  2. Note the Wiring: Take note of how the wires are connected to the old capacitor. A diagram or photo can be helpful.
  3. Disconnect the Wires: Carefully disconnect the wires from the old capacitor.
  4. Install the New Capacitor: Mount the new capacitor in the same location as the old one.
  5. Connect the Wires: Connect the wires to the new capacitor, matching the connections to the old one.
  6. Secure the Capacitor: Secure the capacitor in place using the mounting screws or clips.
  7. Test the Unit: Turn the power back on and test the unit to ensure it’s working correctly.

Important Considerations:

  • Capacitor Specifications: Ensure the new capacitor has the same voltage rating and microfarad (µF) rating as the old one.
  • Polarity: Some capacitors have polarity; make sure to connect the positive and negative terminals correctly.
  • Professional Help: If you’re unsure about any step or encounter difficulties, consult a qualified electrician.

By following these steps and prioritizing safety, you can successfully replace a run capacitor.

Sizing a Run Capacitor

To ensure optimal performance and longevity of your motor, it’s crucial to select the correct size run capacitor. Here’s a general guide:

1. Consult the Motor’s Nameplate:

  • The most reliable method is to refer to the motor’s nameplate. It will specify the required capacitance in microfarads (µF).
  • Exact Match: Ideally, choose a capacitor with the exact same capacitance rating.

2. Manufacturer‘s Recommendations:

  • If the nameplate information is unclear or missing, consult the motor manufacturer‘s specifications or technical documentation.
  • They can provide specific recommendations for the appropriate capacitor size.

3. General Guidelines:

  • While not always accurate, some general guidelines can be helpful:
    • Rough Estimate: For small motors (under 1 horsepower), a 5-10 µF capacitor is often sufficient.
    • Larger Motors: Larger motors may require higher capacitance values, but it’s essential to consult the manufacturer‘s recommendations.

Important Considerations:

  • Voltage Rating: The capacitor’s voltage rating should be equal to or greater than the motor’s operating voltage.
  • Tolerance: The capacitor’s tolerance rating indicates the permissible variation in capacitance. A lower tolerance (e.g., ±5%) is generally preferred for better accuracy.
  • Quality: Choose a high-quality capacitor from a reputable manufacturer to ensure reliable performance and longevity.

Remember:

  • Always prioritize safety when working with electrical components.
  • If you’re unsure about the correct capacitor size or replacement process, consult a qualified electrician.

By following these guidelines and considering the specific requirements of your motor, you can select the appropriate run capacitor and ensure optimal performance of your equipment.

Here’s the difference between start and run capacitors:

Start Capacitor

  • Purpose: Provides a surge of current to help the motor start.
  • Capacitance: Higher capacitance (usually 70-120 microfarads).
  • Connection: Connected to the start winding, which is disconnected after the motor starts.
  • Use: Momentary use, only needed for the initial startup.

Run Capacitor

  • Purpose: Improves the motor’s power factor and efficiency during operation.
  • Capacitance: Lower capacitance (typically 3-70 microfarads).
  • Connection: Connected in parallel with the run winding and remains connected while the motor is running.
  • Use: Continuous use, remains in the circuit throughout the motor’s operation.

In Sum:

  • Start capacitor gives the motor an initial boost to get it spinning.
  • Run capacitor helps the motor run smoothly and efficiently once it’s started.

Both are essential for the proper functioning of single-phase AC induction motors.

The primary purpose of a run capacitor is to improve the power factor and efficiency of a single-phase AC induction motor. It does this by creating a phase shift in the current, which helps to establish a rotating magnetic field within the motor. This rotating magnetic field is necessary for the motor to produce torque and rotate smoothly.

By improving the power factor, the run capacitor reduces the amount of reactive power drawn by the motor, leading to more efficient energy consumption.

When a run capacitor goes bad, it can cause a variety of issues with the motor it’s connected to. Here are some common symptoms:

Motor Performance Issues:

  • Difficulty starting: The motor may struggle to start or take longer than usual to reach full speed.
  • Reduced power output: The motor may not produce its full rated power, leading to decreased performance.
  • Overheating: The motor may overheat due to increased electrical resistance and reduced efficiency.
  • Excessive vibration: The motor may vibrate more than usual, indicating uneven power distribution.
  • Loud noises: The motor may produce unusual noises, such as humming or buzzing, as it struggles to operate.

Other Symptoms:

  • Blown fuses or tripped circuit breakers: A faulty capacitor can cause excessive current draw, leading to blown fuses or tripped circuit breakers.
  • Premature motor failure: A bad capacitor can accelerate motor wear and tear, leading to premature failure.

If you notice any of these symptoms, it’s important to have the run capacitor inspected and replaced if necessary. A faulty capacitor can not only damage the motor but also pose a safety risk.

You can purchase run capacitors at various retailers, both online and in-store. Here are some popular options:

Online Retailers:

  • Amazon: A wide selection of run capacitors from various brands.
  • Mouser Electronics: A specialized electronics retailer offering a range of high-quality capacitors.
  • Alibaba: A global marketplace with a vast selection of run capacitors, often at wholesale prices.

Local Retailers:

  • Hardware Stores: Many hardware stores, such as Home Depot, Lowe’s, and Ace Hardware, carry a variety of run capacitors.
  • Electrical Supply Stores: These stores specialize in electrical components and often have a good selection of capacitors.

Need a Run Capacitor?

If you’re looking for a reliable and high-quality run capacitor, consider purchasing from whishielectronics.com We offer a wide range of capacitors to suit various applications. Visit our website or contact us today to learn more.

Weishi Innovation Logo

Contact Us

Our sales representatives will respond promptly and assist you.