
MARS 12381 Run Capacitor
When you're servicing ductless systems, the MARS 12381 Run Capacitor is a standard-specification component designed specifically for the demanding environment of mini-split fan motors. This 1.5 Microfarad 450Vac Mini-Split Run Capacitor features a flame-retardant plastic case filled with epoxy resin, ensuring high insulation resistance and a stable dissipation factor. As a reliable HVAC motor run capacitor, it is engineered for an operational life of up to 60,000 hours, handling ambient temperatures up to 70°C (158°F). The square-style 1.5 MFD capacitor utilizes 1/4-inch quick-disconnect terminals for fast installation in tight electrical cabinets. Whether you are performing a ductless AC repair or replacing a failed fan motor cap, this 450V motor capacitor provides the necessary phase shift for efficient motor torque. Its compact footprint (1-1/2" x 1/2" x 1") makes it a universal service part for most major mini-split brands requiring a 1.5 uF rating.
Key Benefits for Technicians- Enhanced Thermal Stability: The epoxy-sealed design minimizes internal temperature rise, maintaining performance in high-heat condenser environments.
- Universal Compatibility: Replaces common industry numbers including RC1.5 and 8532250020 for wide-ranging application in ceiling fans and mini-split blowers.
- Reliable Lead Connections: Equipped with standard 1/4-inch terminals to ensure secure, low-resistance electrical contact.
- Precision Tolerance: Maintains a +/- 5% capacitance tolerance for motor efficiency and reduced winding heat.
Can I use this capacitor if my motor calls for 370V?
Yes. A 450VAC rating exceeds 370VAC, allowing this capacitor to be used as a safer, higher-voltage replacement as long as the capacitance (1.5 MFD) matches.
What are the symptoms of a failing 1.5 MFD fan capacitor?
Technicians typically observe slow fan speeds, a humming motor that fails to start, or an "open" reading when tested with a multi-meter in microfarad mode.
Is the polarity important for the two terminals?
No, this is a non-polarized motor run capacitor; either lead can be connected to either terminal during installation.
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.
Original: $1.25
-65%$1.25
$0.44Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
When you're servicing ductless systems, the MARS 12381 Run Capacitor is a standard-specification component designed specifically for the demanding environment of mini-split fan motors. This 1.5 Microfarad 450Vac Mini-Split Run Capacitor features a flame-retardant plastic case filled with epoxy resin, ensuring high insulation resistance and a stable dissipation factor. As a reliable HVAC motor run capacitor, it is engineered for an operational life of up to 60,000 hours, handling ambient temperatures up to 70°C (158°F). The square-style 1.5 MFD capacitor utilizes 1/4-inch quick-disconnect terminals for fast installation in tight electrical cabinets. Whether you are performing a ductless AC repair or replacing a failed fan motor cap, this 450V motor capacitor provides the necessary phase shift for efficient motor torque. Its compact footprint (1-1/2" x 1/2" x 1") makes it a universal service part for most major mini-split brands requiring a 1.5 uF rating.
Key Benefits for Technicians- Enhanced Thermal Stability: The epoxy-sealed design minimizes internal temperature rise, maintaining performance in high-heat condenser environments.
- Universal Compatibility: Replaces common industry numbers including RC1.5 and 8532250020 for wide-ranging application in ceiling fans and mini-split blowers.
- Reliable Lead Connections: Equipped with standard 1/4-inch terminals to ensure secure, low-resistance electrical contact.
- Precision Tolerance: Maintains a +/- 5% capacitance tolerance for motor efficiency and reduced winding heat.
Can I use this capacitor if my motor calls for 370V?
Yes. A 450VAC rating exceeds 370VAC, allowing this capacitor to be used as a safer, higher-voltage replacement as long as the capacitance (1.5 MFD) matches.
What are the symptoms of a failing 1.5 MFD fan capacitor?
Technicians typically observe slow fan speeds, a humming motor that fails to start, or an "open" reading when tested with a multi-meter in microfarad mode.
Is the polarity important for the two terminals?
No, this is a non-polarized motor run capacitor; either lead can be connected to either terminal during installation.
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.











