Mars 12805 Motor Run Capacitor – 5 MFD, 440/370V, Round
The Mars 12805 is a round, single-value motor run capacitor rated at 5 microfarads (MFD) and 440/370 volts AC. Designed for continuous-duty operation in permanent split capacitor (PSC) motors, it is commonly used in HVAC systems and other single-phase motor-driven equipment.
Constructed with metallized polypropylene film and housed in a non-corrosive aluminum canister, this capacitor includes an internal pressure-sensitive interrupter to meet safety standards. It is compatible with standard ¼" male quick-connect terminals, providing ease of installation and interchangeability across multiple applications.
Technical Specifications:
Model: Mars 12805
Capacitance: 5 MFD (μF)
Voltage Rating: 440/370V AC
Shape: Round
Terminals: ¼" male quick-connect
Frequency: 50/60 Hz
Dielectric: Metallized polypropylene film
Enclosure Material: Aluminum
Operating Temperature: -40°C to +70°C
Internal Protection: Pressure-sensitive interrupter
Certification: UL Recognized
Application Overview:
Intended for permanent split capacitor (PSC) motors.
Typically used in condenser fans, blowers, and other single-phase induction motor applications.
Designed for continuous-duty use where a 5 MFD, 440/370V capacitor is specified.
Suitable for field replacement in residential or light commercial HVAC systems.
Installation Considerations:
Ensure all circuits are de-energized and capacitors discharged before handling.
Verify voltage and capacitance match system requirements.
Follow proper wiring practices and observe terminal designations to avoid misconnection.
Install according to local electrical codes and manufacturer specifications.
Secure capacitor to minimize movement or vibration during operation.
The Mars 12805 offers a reliable and durable solution for maintaining consistent motor operation. Its compact form, high voltage rating, and long-life construction make it well-suited for HVAC systems and general motor service where precise capacitance is required.