35 MFD Round Run Capacitor (370V) | 12718
$14.99
A 35 MFD (Microfarad) Round Run Capacitor (370V) is an electrical component commonly used in HVAC (heating, ventilation, and air conditioning) systems, as well as in other motor-driven appliances like pool pumps, well pumps, and some commercial refrigeration units.
Here's a breakdown of what that description means:
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35 MFD (Microfarad): This is the capacitance rating, indicating the amount of electrical charge the capacitor can store. "MFD" is a common abbreviation for microfarad (µF or uF), so 35 MFD is equivalent to 35 µF. This value is critical and must match the requirement of the motor it's designed for.
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Round: This describes its physical shape. Run capacitors come in two common shapes: round and oval. The shape often dictates whether it will fit in the available space within the equipment.
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Run Capacitor: This specifies its function. A run capacitor is designed to provide a continuous phase shift to the motor's start winding, keeping it energized after the motor starts. This helps the motor run more efficiently, quietly, and continuously under load. It's different from a "start capacitor," which only provides a brief boost to get the motor going.
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370V: This is the voltage rating, indicating the maximum voltage that the capacitor can safely handle. It's crucial that the capacitor's voltage rating is equal to or greater than the voltage of the circuit it's used in. For most residential and light commercial applications in North America, 370V is a common rating for single-phase motors. Sometimes, you might also see 440V capacitors, which can often be used as a more robust replacement for 370V capacitors (but never use a capacitor with a lower voltage rating than required).
General Purpose and Function:
In essence, a 35 MFD Round Run Capacitor (370V) acts like a small, temporary battery that stores and releases electrical energy to the motor's auxiliary winding. This creates a rotating magnetic field that helps the motor operate smoothly and efficiently throughout its running cycle. When a run capacitor fails, the motor may struggle to start, hum loudly, run inefficiently, or even fail to run at all.