Capacitor
UK
/kəˈpæs.ɪ.tər/
US
/kəˈpæs.ə.t̬ɚ/
The motor run capacitor uses the charge in its dielectric to boost current, therefore generate power to the motors, while a motor is operating. They improve the motor running performance by continuously providing additional torque.
In air conditioner units, there are basically two run capacitors: one capacitor provides power to the fan motor; the another run capacitor provides power to the compressor.
When replacing a run capacitor, it's important to match the shape (round, oval, or rectangle) and the microfarad rating, voltage, and dimensions. Run capacitors are typically used with medium to high torque applications such as air conditioners, compressors, etc.
Motor run capacitor
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Model CBB65-1 motor run capacitor
FEATURES:
Explosion - proof design
Rated frequency: 50/60Hz
Quick connect terminals
Round metal housing
Capacitance tolerance: 土5%
Working temp.: -40°C to +70°℃Cap.uF 240V-300V 350V-400V 440V-450V Diam.mm Height mm Diam.mm Height mm Diam.mm Height mm 2 40 55 40 55 40 55 3 40 55 40 55 40 55 4 40 55 40 55 40 55 5 40 55 40 55 40 55 7.5 40 55 40 65 40 65 10 40 55 40 55 40 65 12.5 40 55 40 65 40 75 15 40 55 40 65 40 75 17.5 40 65 40 75 40 75 20 40 75 45 75 50 65 25 40 75 45 85 50 75 30 45 75 50 75 50 85 35 45 75 50 75 50 85 40 45 85 50 85 50 100 45 45 100 50 100 50 110 50 45 100 50 100 50 110 55 50 90 50 110 50 125 60 50 100 50 125 50 125 65 50 110 50 125 55 110 70 50 125 55 110 55 125 80 50 125 55 125 60 125 100 55 125 60 125 60 140 -
Model CBB65-A motor run capacitor
FEATURES:
Explosion - proof design
Rated frequency: 50/60Hz
Quick connect terminals
Round metal housing
Capacitance tolerance: 土5%
Working temp.: -40°C to +70°℃Cap.uF 370V 440V Diam.mm Height mm Diam.mm Height mm 15+1.5 50 65 50 75 20+1.5 50 75 50 85 25+3 50 75 50 85 30+5 50 85 50 95 35+5 50 95 50 105 40+5 50 105 50 120 45+5 50 105 50 120 45+7.5 50 120 50 125 50+5 50 120 50 125 50+6 50 120 50 125 50+7.5 50 120 50 125 55+7.5 50 125 55 125 60+7.5 50 125 55 125 65+7.5 55 125 60 120 70+7.5 55 125 60 125 80+10 60 125 60 135 -
Model CBB65-2 motor run capacitor
FEATURES:
Explosion - proof design
Rated frequency: 50/60Hz
Quick connect terminals
Oval metal housing
Capacitance tolerance: 土5%
Working temp.: -40°C to +70°CCap.μF 350V-400V 440V-450V Depth.mm Width mm Height mm Depth.mm Width mm Height mm 5 31.5 51.5 55 31.5 51.5 55 10 31.5 51.5 55 31.5 51.5 65 15 31.5 51.5 65 31.5 51.5 75 20 31.5 51.5 75 31.5 51.5 85 25 45 71 55 45 71 65 30 45 71 65 45 71 75 35 45 71 75 45 71 85 40 45 71 85 45 71 90 45 45 71 90 45 71 100 50 45 71 90 45 71 100 60 45 71 100 45 71 110 70 45 71 110 45 71 125 80 45 71 110 48 90 100 100 45 71 125 48 90 125 -
Model CBB65-B motor run capacitor
FEATURES:
Explosion - proof design
Rated frequency: 50/60Hz
Quick connect terminals
Oval metal housing
Capacitance tolerance: 土5%
Working temp.: -40°C to +70°℃Cap.μF 370V 440V Depth.mm Width mm Height mm Depth.mm Width mm Height mm 20+1.5 45 71 65 45 71 65 25+1.5 45 71 65 45 71 75 30+3 45 71 75 45 71 85 35+5 45 71 85 45 71 90 40+5 45 71 85 45 71 100 45+5 45 71 90 45 71 100 45+7.5 45 71 90 45 71 110 50+5 45 71 100 45 71 120 50+7.5 45 71 110 45 71 125 60+5 45 71 120 45 71 125 60+7.5 45 71 120 48 90 100 65+7.5 48 90 100 48 90 100 70+7.5 48 90 100 48 90 110 80+10 48 90 110 48 90 125
Start capacitor
Start capacitors contain higher capacitance than motor run capacitors, they are normally applied in the circuit of start windings when the motor is starting.
Start capacitors temporarily store an electrical charge to deliver extra torque during motor startup, they provide an immediate electrical push to get the motor rotation started. They exit the circuit once the motor reaches its operating speed. Without a start capacitor when the voltage is applied, the motor would just hum. The start capacitor creates a current to voltage lag in the separate start windings of the motor. The current builds up slowly, and the armature has an opportunity to begin rotating with the field of current.
When replacing a start capacitor, it's important to match the microfarad rating, voltage, and dimensions. Start capacitors typically used with motors that power fans, blowers, and pumps.
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Model CD60 start capacitor
The CD60 series motor start capacitors are designed for the useof AC motor starting and otherintermittent applications.Cap.uF 110V-125V 200V-220V 300V-330V Diam.mm Height mm Diam.mm Height mm Diam.mm Height mm 43-53 36.5 70 36.5 70 46 86 64-72 36.5 70 36.5 86 46 86 72-88 36.5 70 36.5 86 46 86 88-108 36.5 70 46 86 46 86 108-130 36.5 70 46 86 46 86 124-149 36.5 70 46 86 46 86 130-156 36.5 70 46 86 46 111 161-193 36.5 70 46 86 46 111 189-227 36.5 70 46 86 52 111 216-259 36.5 70 46 86 52 111 233-280 36.5 70 46 86 52 111 243-292 36.5 70 46 86 52 111 270-324 36.5 70 46 111 52 111 324-388 36.5 86 46 111 52 111 340-408 36.5 86 46 111 52 111 378-454 36.5 86 46 111 52 111 404-480 36.5 86 46 111 52 111 430-516 36.5 86 46 111 52 111 540-648 46 86 52 111 65 111 590-708 46 86 52 111 65 111 708-850 46 111 52 111 65 111 829-915 46 111 52 111 65 111 1000-1200 52 111 65 111 65 111 -
Hard start kit
FEATURES:
For all PSC AC units from 4000thru 12000 BTU's (1/2 HP thru 10HP)
Can be used on 115 - 288 VAC
Easy 2-wire installationModel Operating Voltage Application Torque Increase SPP5 115-288VAC 1/2 to 10 HP 300% SPP6 115-288 VAC 1/2 to 10 HP 500% SPP8 115-288 VAC 1/2 to 10 HP 600%
FAQs
What does a capacitor do in an air conditioner?
The capacitor assists in providing the necessary phase shift to the motor that drives the air conditioning system, enabling it to start and run efficiently. It is a key component for starting the air conditioning motor. Most of the air conditioners on the market nowadays use capacitors for both starting and operating the air conditioner. The damage of the capacitor will cause the starting current of the compressor to rise too fast, automatically activating the protection mode and stopping the machine or making it impossible to start the compressor, thus causing the air conditioner to fail to operate normally or automatically power off during the startup process. During the process of power-on and startup of the air conditioner, the capacitor acts as a conductor to help the compressor start normally.
How many years does a AC capacitor last?
between 5 and 20 years. The specific service life depends on the type of capacitor and the usage environment. When capacitors are used in some areas with high humidity, they are prone to rusting, affecting the service life. The service life will also be reduced at high temperatures.
How do I know if my AC capacitor is bad?
If the capacitor is broken, the entire air conditioner will not cool, which is also the most common fault causing the air conditioner not to cool or heat. If the air conditioning capacitor is broken, it can generally be seen from the appearance. Some capacitors bulge and leak fluid, which can all be seen from the appearance. But some need a capacitor meter to measure, because it looks good on the outside and professional tools must be used for measurement.
Can I Replace an AC Capacitor Myself?
Although the function and appearance of an AC capacitor resemble those of a battery, they are not of the battery category. Capacitors are connected to the wiring within the air conditioning unit. That's why we suggest that customers refrain from opening the door of their unit to install a new capacitor without the assistance of professionals. As AC capacitors are high-voltage components, they may inflict serious harm on you even when the power is off. It is highly recommended that you do not replace them by yourself.
Reviews
Bengt Karlsson
Calogero
Tim Wikblad
