124-156330 – START CAPACITOR

DiversiTech motor start capacitor rated 124-156 microfarads at 330 VAC. Published case size is 2.062 in. diameter by 4.37 in. high. Standard hard-start capacitor for residential compressors; confirm the MFD range and voltage against the motor or the capacitor you are replacing.

Specifications published by the manufacturer. Source: manufacturer documentation.

Specs

• BrandDiversiTech
• TypeMotor start capacitor
• Capacitance124-156 uF
• Voltage330 VAC
• Case diameter2.062 in.
• Case height4.37 in.

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• T124-156330

Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.

Can I use a 440 VAC capacitor in place of a 370 VAC?

Yes. The voltage number is the maximum the capacitor can withstand, not a strength rating, so 440 goes anywhere 370 was called for and it generally lasts longer through a Dallas summer. The reverse is not true - do not put a 370 where 440 is specified. Either way the microfarad has to match the nameplate.

Is a bigger microfarad rating better?

No, and this one costs people compressors. A capacitor does not boost anything. Raising microfarad raises start winding current, which is how you cook a compressor early. Match the nameplate. Most run capacitors are built to plus or minus 6 percent, so a 35 microfarad unit reading 33 to 37 is in spec, and a 35 reading 28 is trash even though your meter still shows a number.

What do HERM, FAN and C mean on a dual run capacitor?

C is common and takes the line leg. HERM feeds the compressor, FAN feeds the condenser fan motor. A 35/5 is 35 microfarad on HERM and 5 on FAN. You can replace one dual with two singles of the matching values if there is room, but never land two loads on a terminal that is not C.

How do I work on one safely?

Shut off the breaker and pull the disconnect. That is it. Ignore anybody who tells you to short the terminals with a screwdriver. That advice is wrong and we have banned it here. A run capacitor stays wired across the motor windings, so cutting power bleeds it off through the winding within seconds.