Hartland Controls CAP-3/440 Run Capacitor

The Hartland Controls CAP-3/440 is a heavy-duty 3 microfarad oval run capacitor engineered for continuous duty in residential and commercial HVACR systems. Built to meet EIA-456-A standards, this component is a reliable solution for maintaining the proper phase angle in condenser fan motors and small compressor applications. The 370/440Vac dual voltage rating offers maximum versatility, allowing it to safely replace 370V capacitors while providing a superior voltage margin for handling power fluctuations. Encased in an unpainted, aluminum oil-filled housing, it features metallized polypropylene film technology and a 10,000 AFC internal protection bridge to ensure system safety during electrical faults. Designed for a service life of approximately 22,000 hours at a 94% survival rate, this capacitor maintains its 3 MFD capacitance within a ±3% tolerance, optimizing motor torque and energy efficiency while reducing heat buildup in the windings.

• Optimized Motor Performance: Ensures precise 3 MFD capacitance for high-efficiency motor starting and running.
• Dual Voltage Compatibility: Rated for both 370V and 440V applications, reducing truck stock requirements.
• Industrial-Grade Safety: UL 810 recognized with a built-in pressure-sensitive interrupter to prevent case rupture.
• Broad Environmental Range: Operates reliably in extreme temperatures ranging from -40°C to 70°C (-40°F to 158°F).
• Standard Terminations: Features 1/4-inch quick-disconnect terminals for fast, secure wiring in the field.

Can I use an oval capacitor to replace a round one?
Yes, as long as the microfarad (MFD/µF) and voltage ratings match. The physical shape (oval vs. round) does not affect electrical performance, though you may need a different mounting strap.

Is it safe to use a 440V capacitor if the original was 370V?
Absolutely. You can always go up in voltage rating (e.g., replacing 370V with 440V) to provide a better safety margin, but you should never install a lower-rated capacitor than required by the motor nameplate.

How do I know if my 3 MFD capacitor is failing?
Common signs include a humming fan motor that won't start, a bulging or leaking capacitor casing, or a capacitance reading (measured with a multimeter) that has dropped below the ±3% tolerance range.

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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.