Motor Run Capacitors

Looking to buy high-quality film capacitors? Your search ends here. We stock plastic and metallic case electric motor capacitors that are safe, lightweight and compact – the kind that do what they are supposed to.
Motor Run Capacitors

Whether you wish to start up an air conditioner or forced air furnace or you simply want to keep that old Jacuzzi spa pump or compressors running without a hitch, the products that we supply will see you get the job done affordably.

We sell,

Ducati Run Capacitors

1uF 1.5uF 2uF 2.5uF 3uF 4uF 5uF 6uF 7uF 8uF 10uF 12uF 14uF 15uF 16uF 20uF 25uF 30uF 35uF 40uF 45uF 50uF 60uF 65uF 70uF 80uF 100uF

Why Capacitor Shop?

Here are 5 good reasons to choose us:

  • Quality. We stock quality Motor Capacitor products! The components that we supply form part of the esteemed DUCATI range and ItalFarad, which are widely recognised as being the best on the market. Expect motor run & start capacitors that offer low non-inductive winding loss and do not leak or short circuit.
  • Price. High quality doesn’t always equate with high costs. We have longstanding relationships with the product manufacturers, so you will be hard-pressed to find another capacitor supplier who can match our pricing. We also run promotions on items from time to time.
  • Simplicity. Ordering is quick and easy with our user-friendly checkout cart system. Simply click the “Capacitor Shop” tab above, select your item from the dropdown menu on the next page and then enter a few billing and shipping details. Click “PLACE ORDER” and you’re done.
  • Speed. We deliver fast. In fact, we are dedicated to getting your product to you as quickly as possible. All orders placed between Monday and Thursday are normally delivered in 1-2 days but not guaranteed. Excluding weekends or bank holidays.
  • Service. Efficient customer service comes standard when you order through Capacitor Shop. Your satisfaction is important to us, which is why we go the extra mile to ensure that you not only get the best prices and products, but also receive fast and friendly assistance. Get the best Motor Capacitors money can buy,
  • NEWS: We will soon be adding capacitors for domestic appliances like washing machines, dishwashers, washing machines and many other home appliances.

Capacitor Motor Run – Single Phase – Motor Capacitors

Why Else?

Here is another good reason:

  • Information. While we are not at liberty to dispense technical advice on products, we do believe that an informed customer is a happy customer. For this reason, we provide free electric motor capacitor information on this website, enabling you to purchase with confidence.

Motor Capacitors – FAQ Questions:

What does a motor run capacitor do?

A motor capacitor is an electrical component that is commonly found in single phase AC motors. It is a device that stores electrical energy and releases it to the motor’s windings at the right moment, helping the motor to start and run smoothly.


The capacitor works by creating a phase shift between the motor’s start winding and run winding, which produces a rotating magnetic field. This rotating magnetic field creates the torque needed to start and run the motor. Without the film capacitor, the motor may not be able to start at all, or it may start slowly and run inefficiently.

One of the most significant advantages of using a motor capacitor is that it can improve the motor’s efficiency. By creating the phase shift, the capacitor reduces the amount of current that the motor needs to draw from the power supply to produce the same amount of torque. This reduction in current draw leads to lower energy consumption and reduced operating costs.

Start capacitors

Motor starting capacitors come in different sizes and uf capacitance ratings, depending on the motor’s horsepower and voltage requirements. They are usually made of aluminum or plastic and are designed to withstand the high temperatures and electrical stresses of motor operation and some have quick connect terminals.

Motor start

In summary, a motor capacitor is an essential component of many single-phase AC motors. Its primary function is to store and release electrical energy at the right moment to help the motor start and run smoothly. By improving the motor’s efficiency and reducing energy consumption, it can help save money on energy bills and prolong the motor’s lifespan.

What happens when a motor run capacitor goes bad?

A motor capacitor is an electrical component that helps to start and run electric motors. It stores electrical energy and releases it to the motor as needed. However, like all electrical components, a motor capacitor can go bad over time.

Motor Starting

When a motor capacitor goes bad, several things can happen. The first and most obvious sign of a bad capacitor is that the motor won’t start. The capacitor is responsible for providing the initial jolt of electricity needed to start the motor. If the capacitor is faulty, the motor won’t receive the necessary energy to start, and the motor will not turn on.

Another sign of a bad capacitor is that the motor may start but then run erratically or unevenly. The capacitor is responsible for regulating the flow of electricity to the motor, and if it is not functioning correctly, the motor may receive too much or too little electricity, causing it to run inconsistently.

In some cases, a bad capacitor can cause the motor to overheat. The capacitor regulates the voltage going to the motor, and if it is faulty, it can cause the motor to receive too much voltage, which can lead to overheating and damage.

Finally, a bad capacitor can cause the motor to make unusual noises or emit strange odors. This is often a sign that the motor is working harder than it should be, and the capacitor is not regulating the voltage correctly.

If you suspect that your capacitor is bad, it’s important to have it replaced as soon as possible. Continuing to use a faulty capacitor can cause further damage to your motor or even lead to a dangerous electrical malfunction. A qualified electrician or technician can diagnose and replace the faulty capacitor, ensuring that your motor runs smoothly and efficiently.

Will a motor run without a run capacitor?

A motor’s run capacitor is an important component that helps to ensure that the motor runs smoothly and efficiently. The run capacitor is responsible for creating a phase shift in the motor’s electrical current, which helps to produce the rotating magnetic field that drives the motor’s rotation. Without a run capacitor, the motor may still run, but it is likely to experience a number of issues that can impact its performance and lifespan.

One of the main problems that can occur when a motor runs without a run capacitor is that it may struggle to start up. This is because the motor’s electrical current will not be able to create the necessary phase shift without the capacitor, which can lead to a reduction in torque and an inability to overcome the resistance of the load. This can cause the motor to stall or fail to start altogether.

Another issue that can arise when a motor runs without a run capacitor is that it may run at a slower speed than normal. This is because the lack of a phase shift can cause the motor to become unbalanced, which can lead to a reduction in the speed and efficiency of its rotation. Additionally, the motor may experience a higher current draw, which can cause it to overheat and suffer from premature failure.

In some cases, a motor may be designed to run without a run capacitor, such as in certain types of single-phase motors. However, these motors typically have other components that help to compensate for the lack of a capacitor, such as a centrifugal switch or a shaded-pole design. Even in these cases, however, the motor may not run as smoothly or efficiently as it would with a run capacitor.

Overall, while a motor may technically be able to run without a run capacitor, it is not recommended. The run capacitor is an important component that helps to ensure the motor runs smoothly and efficiently, and without it, the motor is likely to experience a range of issues that can impact its performance and lifespan. If you suspect that your motor is running without a run capacitor or if you are experiencing any issues with your motor, it is best to consult with a qualified electrician or technician to ensure that your motor is operating correctly and safely.

We do not offer click and collect but just a quick view on the website, add to basket and we can post out parts same or next day to your area for your convenience. We may not be able to send to some countries as the start run motor capacitor may be a restricted item.

Motor Capacitors

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