12.5/440 – CAPACITOR (OVAL, MADE IN USA)

If your AC won’t start, hums but doesn’t kick on, or runs but won’t cool, a bad capacitor is the most common cause. This 12.5 MFD oval cap keeps your condenser fan motor running. Replace when the fan won’t start or spins slowly.

Replaces: POCF125A

Fits: Fits most residential HVAC systems using this value. Bring your old cap or model number — we match at the counter.

Need help? See our AC Not Cooling Troubleshooting Guide or Capacitor Cross-Reference Chart.

In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.

Specs

• Capacitance12.5 MFD
• Voltage440V (compatible with lower-voltage applications)
• Tolerance±6%
• Frequency50/60 Hz
• TypeSingle-run capacitor
• ShapeOval
• TerminalsQuick-connect
• UL ListedYes
• OriginUSA-made

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• 125440
• 12933
• CAP-125440
• CAP125000440
• CAPACITOR
• CR125X440
• P291-1254
• POCF125A
• SA2037
• TP-CAP-125440

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

Fits these models

• CAP0125040440ST

How do I know if my run capacitor is bad?

The motor it powers (fan or blower) won't start, hums but doesn't spin, runs slow, or trips on overload. We bench-test these free at the counter — bring it in.

Can I use a higher MFD rating?

No. Match MFD exactly to the motor's data plate. Higher MFD over-amps the windings and shortens motor life. Voltage rating can go UP (440V replaces 370V) but never down.

Does shape (oval vs round) matter?

Electrically no — same value works in either shape. Fitment in your cap bracket might. Bring the old one in and we'll match the form factor.

Do I need to discharge it before removing?

Yes — even an "off" cap holds 240V+ that bites hard. Short the terminals with an insulated screwdriver for 5 seconds before disconnecting.