SFCAP45440R Round Run Capacitor 45 MFD 370V/440V Universal Replacement

The Trane SFCAP45440R is a high-performance 45 MFD round run capacitor designed to serve as the electrical "brain" and power reservoir for your outdoor unit's compressor or fan motor. This critical component provides the necessary phase-shift and torque required for the motor to start and run efficiently. Engineered specifically for Trane and American Standard furnace and A/C series, this capacitor stores an electrical charge to maintain a consistent magnetic field within the motor windings. By stabilizing the voltage and current, it ensures your compressor operates at peak efficiency, preventing the overheating and "hard starting" that can lead to catastrophic system failure during high-demand summer months.

Key Features

• Genuine Trane Service First Part SFCAP45440R: A factory-authorized component designed to meet the rigorous vibration and thermal standards of Trane and American Standard equipment.
• Dual Voltage Rating (370V/440V): This "Universal" 440V rating allows it to safely replace both 370V and 440V capacitors, providing superior dielectric strength and a longer service life.
• Fixes Compressor Starting & Hum Issues: Directly resolves common "humming" sounds and intermittent startup failures by providing the precise 45 MFD capacitance required for the motor's run winding.
• Non-PCB, Oil-Filled Safety Design: Features an internal pressure-sensitive interrupter that safely disconnects the capacitor in the event of an internal short, preventing the casing from rupturing.
• Rust-Resistant Aluminum Casing: Constructed with a high-grade aluminum housing designed to dissipate heat rapidly and resist corrosion in high-humidity outdoor environments.

Product Details

• Brand: Trane / American Standard / Service First
• Manufacturer: Trane Technologies
• Part #: SFCAP45440R
• UPC/SKU: 662425455241 / SFCAP45440R
• Weight: 0.8 lbs
• Capacitance: 45 MFD (uF)
• Voltage: 370 / 440 VAC
• Shape: Round
• Frequency: 50 / 60 Hz
• Tolerance: +/- 5%
• Operating Temp: -40°C to +70°C

🛠️ HVAC Depot Pro Tip

"Take a Picture First"—before you disconnect the wires from the old capacitor, photograph the terminal markings (C, HERM, or FAN). Since the SFCAP45440R is a "Run" capacitor, ensure you are matching the correct microfarad (45 MFD) rating of the original part. During your Diagnostic Check, use a multimeter to verify the capacitor is fully discharged before handling. If you see the top of your old capacitor is "domed" or "bulged," it has failed and must be replaced immediately to prevent damage to your expensive compressor motor.

Cross-Reference

• Superseded / Legacy Numbers: CPT00662, CPT-0662, CPT0662, C345R, CAP00450440R
• Affiliated / Related Numbers: CPT01146, CPT-1146, CPT01861, CPT-1861
• Drawing / Equivalent Numbers: USA2234, 97F9645, 12945
• MARS / Packard Equivalents: 12245, 14245, POC45

Model Compatibility

• Trane XE / XL Series (Suffixes: XE1000, XE1100, XE1200, XL1200, XL13i, XL14i, XL16i)
• American Standard Allegiance (Suffixes: 10, 11, 12, 13, 14, 16)
• Trane XR Series (Suffixes: XR11, XR12, XR13, XR14, XR15)
• Trane TWE / TWP (Suffixes: 030, 036, 042, 048, 060)
• American Standard Silver / Gold (Suffixes: SI, XI, ZI)
• Bay / GAT Series (Suffixes: GAT036, GAT048, GAT060)