Will this replace my old dual run capacitor?

Only if your original is a dual round capacitor with the same 40 µF and 7.5 µF sections and a 440V AC rating. Match the printed values and terminal layout before ordering.

What does 40 + 7.5 µF mean?

It is two capacitors in one can: a 40 µF section and a 7.5 µF section. Each has its own terminals, so one section can run the compressor and the other the fan motor.

Is 440V enough for my unit?

The voltage rating must be equal to or higher than the original. Many residential condenser units use 370V or 440V capacitors; never fit a lower rating than the part you are replacing.

Can I use it on a single-motor application?

Yes, if you only need one section. Use the 40 µF or the 7.5 µF terminals as required and leave the other section unconnected.

How do I know when a run capacitor has failed?

Common signs are a humming compressor that will not start, a fan that will not spin, or a bulged top or leaking can. Power off and discharge the capacitor before checking.

Where is the 40 + 7.5 µF mfd - 440V DUAL ROUND RUN CAPACITOR cheapest?

At Air Conditioning & Refrigeration Wholesaler, for $5.15, 69% under what the other stores charge, as of our latest check.

What do buyers say about the 40 + 7.5 µF mfd - 440V DUAL ROUND RUN CAPACITOR?

Rated 5 out of 5 from 1 ratings.

Where can I buy the 40 + 7.5 µF mfd - 440V DUAL ROUND RUN CAPACITOR?

15 stores we checked sell it, including Air Conditioning & Refrigeration Wholesaler, Controls Central, Amazon, Jackson Systems & Supply, Midwest Appliance Parts.