Hartland Controls CAP-4/440R Run Capacitor
The Hartland Controls CAP-4/440R is a high-reliability, 4 Microfarad (µF) round run capacitor designed for continuous duty in HVACR systems. Engineering to support 370/440Vac applications, this capacitor provides the necessary phase shift to optimize motor torque and operational efficiency in condenser fan motors and small compressors. Its dual-voltage rating makes it a versatile replacement for older 370V units, offering a higher dielectric strength to handle voltage surges without premature breakdown.
Constructed with a non-PCB biodegradable synthetic oil and a robust aluminum case, the CAP-4/440R features a chemical interrupter safety mechanism that disconnects the capacitor in the event of internal pressure buildup. The physical design includes 1/4" quick-connect terminals for standard wiring harnesses, ensuring a secure electrical connection. Maintaining the correct 4 MFD capacitance within the standard +/- 5% tolerance is critical for preventing motor overheating and ensuring the longevity of the start windings.
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Key Benefits:
- Dual Voltage Compatibility: Rated for both 370Vac and 440Vac systems, reducing truck stock requirements.
- Enhanced Safety: Built-in pressure-sensitive interrupter prevents housing rupture during failure.
- Industrial Build: Aluminum oil-filled construction meets UL 810 standards for safety and reliability.
- Optimal Performance: Sustains stable 4 uF capacitance to keep fan motors running at peak efficiency.
Can I use a 440V capacitor to replace a 370V capacitor?
Yes, you can always step up in voltage. A 440V rated capacitor like the CAP-4/440R is a heavy-duty replacement for a 370V unit, as it has a thicker dielectric layer capable of withstanding higher electrical stress.
What happens if my 4 MFD run capacitor is weak?
If the capacitance drops below the 5% tolerance, the motor will draw higher amperage, run hotter, and eventually trip the internal thermal overload. A failed capacitor is the leading cause of a fan motor "humming" but failing to spin.
How do I test this capacitor under load?
Technicians can verify capacitance while the system is running by measuring the start winding amps and the voltage across the capacitor, then using the formula: (Amps x 2652) / Voltage = MFD.
This item is not eligible for free shipping.
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.
Product Information
Product Information
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Shipping & Returns
Description
The Hartland Controls CAP-4/440R is a high-reliability, 4 Microfarad (µF) round run capacitor designed for continuous duty in HVACR systems. Engineering to support 370/440Vac applications, this capacitor provides the necessary phase shift to optimize motor torque and operational efficiency in condenser fan motors and small compressors. Its dual-voltage rating makes it a versatile replacement for older 370V units, offering a higher dielectric strength to handle voltage surges without premature breakdown.
Constructed with a non-PCB biodegradable synthetic oil and a robust aluminum case, the CAP-4/440R features a chemical interrupter safety mechanism that disconnects the capacitor in the event of internal pressure buildup. The physical design includes 1/4" quick-connect terminals for standard wiring harnesses, ensuring a secure electrical connection. Maintaining the correct 4 MFD capacitance within the standard +/- 5% tolerance is critical for preventing motor overheating and ensuring the longevity of the start windings.
-
Key Benefits:
- Dual Voltage Compatibility: Rated for both 370Vac and 440Vac systems, reducing truck stock requirements.
- Enhanced Safety: Built-in pressure-sensitive interrupter prevents housing rupture during failure.
- Industrial Build: Aluminum oil-filled construction meets UL 810 standards for safety and reliability.
- Optimal Performance: Sustains stable 4 uF capacitance to keep fan motors running at peak efficiency.
Can I use a 440V capacitor to replace a 370V capacitor?
Yes, you can always step up in voltage. A 440V rated capacitor like the CAP-4/440R is a heavy-duty replacement for a 370V unit, as it has a thicker dielectric layer capable of withstanding higher electrical stress.
What happens if my 4 MFD run capacitor is weak?
If the capacitance drops below the 5% tolerance, the motor will draw higher amperage, run hotter, and eventually trip the internal thermal overload. A failed capacitor is the leading cause of a fan motor "humming" but failing to spin.
How do I test this capacitor under load?
Technicians can verify capacitance while the system is running by measuring the start winding amps and the voltage across the capacitor, then using the formula: (Amps x 2652) / Voltage = MFD.
This item is not eligible for free shipping.
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.
