CAP035 Generic 35uF Run Capacitor, 35 Microfarad Universal Part for Air Conditioner Compressors and Single Phase Motors

CAP035 is a generic 35uF run capacitor, a universal part chosen by its value rather than by appliance brand. Run capacitors stay in the circuit the whole time a single phase motor or compressor is running, helping it turn efficiently. Values around 35 microfarads are typical on air conditioner compressors and larger pump motors. Read the label on your old capacitor and confirm the uF value, voltage rating and terminals match before ordering.

Symptoms of a failed 35uF run capacitor

A single phase motor needs a second, shifted supply to its auxiliary winding, and the run capacitor provides it. When the capacitor weakens or fails, the motor may hum but not start, start slowly, run hot, draw high current or trip its overload after a short time. On an air conditioner that often shows up as the outdoor unit humming with the compressor not running, or poor cooling. A bulging top, leaking oil or a reading well below 35uF on a capacitance tester are clear signs it's finished.

Part details

• Capacitance: 35uF (35 microfarad)
• Run capacitor for single phase motors and compressors
• Generic universal part, not tied to one brand
• Check the voltage rating and terminals against your old capacitor

Safe capacitor replacement

Turn off and isolate the power, and for a hard-wired air conditioner or other fixed equipment, have a licensed electrician do the work. Capacitors can hold a charge after the power is off, so discharge it safely before touching the terminals. Photograph the wiring, note which wire goes to each terminal, and secure the new capacitor with the original clamp or bracket.

Questions about this part

Can I fit a capacitor with a higher voltage rating?

Generally yes. The uF value should match the old capacitor, and the voltage rating should be the same or higher, never lower. A higher rated capacitor can be physically larger, so check it will fit the space and the mounting bracket.