Packard PMJ400 Start Capacitor

When you're out in the field and a compressor or fan motor is humming but failing to turn over, the Packard PMJ400 Start Capacitor is the reliable industrial-grade solution you need. This 400-480 MFD 125V Round Start Capacitor is specifically engineered for intermittent duty in AC motor starting circuits, providing the high-torque boost necessary to engage single-phase motors quickly. Built with a rugged, moisture and oil-resistant phenolic resin case, this dry electrolytic capacitor is designed to withstand the harsh environments of an HVACR mechanical room or outdoor condensing unit.

The PMJ400 features a compact 1-7/16" diameter and 3-3/8" height, making it a versatile motor start capacitor for tight electrical enclosures. With a 3-second start rating and a capability of up to 20 starts per hour, it meets or exceeds EIA Standard RS-463 type 2. The standard dual blade terminals allow for fast, secure connections with 1/4" push-on connectors. Because it is non-polarized, it integrates seamlessly into 50/60 Hertz systems, ensuring compatibility with a wide range of fractional horsepower motors and residential cooling equipment.

• Ensures high-torque motor engagement for 110-125V AC applications.
• Durable phenolic resin housing protects internals from moisture and contaminants.
• Precision-engineered for 400-480 microfarad requirements.
• Compact round case design facilitates easy replacement in existing motor cans.
• Wide operating temperature range of -40°C to 65°C (-40°F to 149°F) for extreme reliability.

• How do I know if I need a 400-480 MFD start capacitor? Check the label of the failed unit; start capacitors are typically rated in ranges. If your motor requires 125V and hits this MFD range, the PMJ400 is the correct high-torque match.
• Can I use this as a run capacitor? No. This is a dry electrolytic capacitor designed for intermittent duty only. Staying in the circuit for more than a few seconds will cause the unit to fail.
• Does the physical size matter? Electrical specs (MFD and Voltage) are the primary concern, but ensure your mounting strap or capacitor cover can accommodate a 1-7/16" diameter.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.