Packard PMJ145 Start Capacitor

The Packard PMJ145 Start Capacitor is a dry electrolytic, non-polarized motor start capacitor engineered for momentary duty in AC motor applications. Rated for 145-175 MFD at 125V (110-125 VAC), this component provides the high starting torque necessary for fractional horsepower compressors and fan motors in HVACR systems. Built within a moisture-resistant phenolic resin case, the PMJ145 is designed to withstand the physical demands of frequent start cycles. It features a compact round diameter (typically 1-7/16") with dual blade terminals for standard push-on connections, making it a drop-in replacement for standard OEM motor capacitors. This 145-175 microfarad capacitor ensures reliable phase-shift for single-phase induction motors, reducing the amperage draw during the critical in-rush period. It is essential to ensure the voltage rating of 125VAC meets or exceeds the application requirement to prevent dielectric breakdown. This unit is commonly utilized in residential refrigeration and light commercial cooling equipment.

• Capacitive Range: 145-175 MFD (Microfarads) for high-torque motor starts.
• Voltage Rating: 125 VAC 50/60Hz, compatible with 110V and 120V systems.
• Form Factor: Industry-standard round case with 1-7/16-inch diameter for universal mounting.
• Terminal Configuration: standard 1/4-inch quick-connect terminals for easy field installation.
• Temperature Range: Rated for high-cycle environments common in HVACR service.

Can I use a start capacitor with a higher MFD rating than the original?
It is recommended to stay within +/- 10% of the original MFD rating. A 145-175 MFD capacitor should only replace units within that specific range; excessive capacitance can cause the motor windings to overheat during the start cycle.

What causes a Packard PMJ145 to fail prematurely?
Premature failure is often caused by a faulty potential relay or centrifugal switch that fails to take the capacitor out of the circuit once the motor reaches speed. Prolonged energization will lead to electrolyte leakage or casing rupture.

Is the PMJ145 compatible with 240V systems?
No, this unit is rated for 125V maximum. Using this on a 208/240V circuit will cause immediate failure of the dielectric material.

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.