Dual Capacitor, Round, 50/3/370 uF

Rheem/RUUD 43-25133-07 – PROTECH Dual Run Capacitor, 50/3 MFD, 370V

The PROTECH 43-25133-07 is an OEM-grade dual motor run capacitor designed for Rheem and RUUD HVAC systems. Rated at 50/3 microfarads (MFD) and 370 volts AC, this component provides phase-shifting support for both compressor and fan motor circuits in permanent split capacitor (PSC) applications. It is used in system configurations that require a shared run capacitor for efficient multi-motor operation.

Manufactured to meet UL 810 safety standards and tested for 5000 AFC, the PROTECH 43-25133-07 is engineered for field durability, dielectric stability, and exact mechanical fit in systems that specify this part number.

Field-Performance Features

• ✅ Dual Value Rating – Supplies 50 MFD (compressor) and 3 MFD (fan motor) from a single sealed unit.
• ✅ Voltage Rating: 370V AC – Tolerant to voltage spikes and thermal cycling common in HVAC environments.
• ✅ Construction: Metallized polypropylene film in hermetically sealed aluminum housing with pressure-sensitive interrupter.
• ✅ Certification: UL 810 listed; tested for 5000 amp fault current (AFC).
• ✅ Form Factor: 2.62” diameter x 3.35” height – Matches OEM dimensions for bracket compatibility.

Technical Specifications

• OEM Part Number: 43-25133-07
• Brand: PROTECH (by Rheem/RUUD)
• Capacitance: 50/3 MFD
• Voltage: 370 VAC
• Shape: Round
• Use Case: Dual motor run capacitor for condenser and air handler systems

Installation Requirements

This component should be installed by certified HVAC technicians. Prior to installation, ensure that all electrical circuits are de-energized and that residual charge is discharged from the existing capacitor. Confirm that the replacement matches the original unit in capacitance and voltage rating to avoid improper operation or system damage.

• ???? Required Tools: Insulated screwdriver, nut driver, multimeter (capacitance-rated)
• ???? Safety Protocols: Use PPE, follow lockout/tagout (LOTO) procedures, and verify wire labeling before disconnecting
• ⚠️ Note: Secure terminal fittings and mounting bracket to prevent vibration-related degradation over time

Application Scope

The PROTECH 43-25133-07 is used in Rheem and RUUD HVAC systems requiring dual run capacitors with a 50/3 MFD rating. It is appropriate for residential and light commercial units where compressor and fan circuits are supported by a shared run capacitor. This part number is commonly specified for direct replacements in factory-installed assemblies.

Contractor Benefits

• ✅ OEM Compatibility – Designed specifically for Rheem and RUUD systems for drop-in replacement
• ✅ Reliable Dielectric Performance – Maintains phase integrity and reduces risk of motor overheating
• ✅ Consistent Fitment – Standard physical dimensions for seamless cabinet integration
• ✅ UL Compliance – Approved under UL 810, suitable for inspection and warranty compliance requirements

Professional Summary

The PROTECH 43-25133-07 capacitor is a dual-value component specified for Rheem/RUUD air conditioning and heat pump systems requiring 50/3 MFD at 370V. It meets UL 810 standards and offers a direct OEM replacement for maintaining system efficiency, startup torque, and motor longevity. Suitable for both preventative maintenance and emergency service calls, this capacitor supports high-cycle HVAC equipment in real-world operating environments.