Mars 12734 – 15 MFD, 440V Round Motor Run Capacitor
The Mars 12734 is a single-value motor run capacitor designed for use in continuous-duty single-phase motor applications. With a capacitance of 15 microfarads and a voltage rating of 440 VAC, it is commonly installed in HVAC systems to support fan motors, blowers, and other induction motor loads requiring stable phase-shifting power.
The capacitor is constructed using metallized polypropylene film and features a pressure-sensitive internal safety interrupter. It is housed in a round aluminum canister with standard ¼" male quick-connect terminals for compatibility with a wide range of OEM and replacement applications.
Technical Specifications:
Capacitance: 15 microfarads (MFD)
Voltage Rating: 440V AC
Frequency: 50/60 Hz
Dielectric: Metallized polypropylene film
Case Material: Aluminum (round)
Safety Feature: Built-in pressure interrupter
Operating Temp Range: -40°C to +70°C
Mounting Style: Standard canister; vertical or bracket-mounted
Terminals: Dual ¼" quick-connect blades
Application Notes:
Designed for permanent split capacitor (PSC) motor systems in HVAC air handlers, fan coils, and condensers
UL-recognized and RoHS-compliant component suitable for residential and light commercial installations
Intended for use where a single capacitance value is required to maintain consistent motor torque and efficiency
Ideal for service replacement, system maintenance, and inventory stocking by HVAC professionals
Contractor Considerations:
Rated for high-voltage applications where reliability is critical in high-cycle environments
Compact form factor allows for retrofit compatibility with most OEM designs
Durable construction withstands elevated temperatures and mechanical vibration
Compatible with Mars and other standard HVAC capacitor brackets and mounting hardware