45/5/440 – DUAL CAPACITOR (ROUND, 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 45+5 MFD dual cap powers both your compressor (45 MFD) and condenser fan motor (5 MFD) from one unit — the most common capacitor type in residential AC systems.

Replaces: 2MD4455, 43-101665-41, 89M80, 97F9838, 97F9846, C3455R, CAP-455440R, CAP050450440CT, CAP050450440RTP, CD455X440R, CPT0455, CR455X440R, HC98KA046, P291-4553RS, P291-4554RS, PRCFD455, PW-455R, TRCFD455, 1172124, 1185334, 12244, 12288, 12788

Fits: ICP/Heil: NXH542GKA100. Compatible with most residential AC systems using a 45+5 MFD 440V dual run capacitor — Goodman, Trane, Carrier, Lennox, Rheem, and others.

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 capacitors at the counter before you buy — bring your old one in and we’ll confirm the replacement. Call or text (214) 340-9421.

Specs

• Capacitance45 MFD (HERM) · 5 MFD (FAN)
• Voltage440V (compatible with lower-voltage applications)
• Tolerance±6%
• Frequency50/60 Hz
• ShapeRound
• TerminalsQuick-connect
• Temperature Range-40°F to 158°F
• UL ListedYes
• OriginUSA-made

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• 040-01084
• 1114278
• 1172124
• 1185334
• 12244
• 12288
• 12788
• 12790
• 13ACX-036-230
• 2MD4455
• 43-101665-41
• 43-25024-01
• 43-TL45054-R
• 89M80
• 97F9838
• 97F9846
• C3455R
• CAP-455440R
• CAP050450440
• CAP050450440CT
• CD455X440R
• CPT0455
• CR455X440R
• HC98KA046
• MAR12882
• NXH542GKA100
• P291-4553RS
• P291-4554RS
• PRCFD455
• PW-455R
• RH0850
• TP-CAP-455440R
• TRANE
• TRCFD455
• USA2236

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

Fits these models

• 13ACX-036-230-13
• CAP050450440RTP

How do I know if my capacitor is bad?

Classic signs: AC hums but the outdoor fan won't spin, compressor won't start, or the system short-cycles. Bring it to the counter and we'll bench-test it free.

Can I use a higher MFD rating than the spec?

No. Match MFD exactly to the data plate. Higher MFD pulls more amps and will burn out your motor windings. Voltage rating can go up (440V replaces 370V), but capacitance has to match.

How long should a capacitor last?

Texas heat shortens cap life. Expect 5-7 years on a residential cap; less if your unit bakes in full afternoon sun. Cheaper imported caps fail sooner — we stock USA-made Titan HD if you want the upgrade.

Do I need to discharge it before removing?

Yes. Even an "off" cap holds a 240V+ charge that'll bite hard. Short the terminals together with an insulated screwdriver for 5 seconds before disconnecting.