CAP030 Generic 30uF Motor Run Capacitor, Universal Replacement for Air Conditioner, Pump and Fan Motors

CAP030 is a generic 30uF motor run capacitor, a universal replacement for the run capacitor on single phase motors in air conditioners, pumps, fans and some appliances. It suits any motor whose existing capacitor is marked 30uF, provided the voltage rating, size and terminals also match. Read the label on the old capacitor before ordering and compare it with this one. CAP030 isn't tied to a single brand, so the numbers on that label are what count.

Signs a motor run capacitor has failed

A run capacitor stays in the circuit the whole time the motor runs. It shifts the timing of the current to the motor's second winding, which gives the motor its starting push and keeps it turning smoothly and cool. When the capacitor weakens or fails, the motor may hum without turning, start only if the fan blade is flicked by hand, run slowly, or trip its overload after a few minutes. On air conditioners a failed capacitor often shows up as an outdoor fan that won't spin. A bulging top or oil on the case is a giveaway.

Part details

• Capacitance 30uF
• Motor run type capacitor
• Generic universal part, not specific to one brand
• Match uF, voltage rating, case size and terminals to the old capacitor

Changing a run capacitor safely

Isolate power at the switchboard or isolator first. Capacitors can hold a charge after the power is off, so discharge the old one with an insulated resistor tool before touching its terminals. Photograph the wiring, then move each wire across one at a time. Air conditioners and other hard-wired equipment must be worked on by a licensed electrician.

Questions about this part

Can I use a capacitor with a different uF value?

No. Use the uF value printed on the old capacitor, so a 30uF motor needs a 30uF capacitor. The wrong value can make the motor run hot, weak or noisy. The voltage rating can be the same or higher than the old one, but never lower.