Description
The Mars 11949 is a heavy-duty round start capacitor engineered to deliver the high-torque starting boost that single-phase HVAC motors demand. With a wide capacitance range of 145–175 microfarads and a dual voltage rating of 220/250VAC, this capacitor is a versatile fit for a broad range of residential and light commercial air conditioning, heat pump, and refrigeration applications.
Start capacitors are engaged only during the motor start cycle, providing the extra electrical energy needed to overcome inertia and bring the motor up to operating speed quickly. The Mars 11949’s generous capacitance range allows it to serve as a direct replacement for a wide variety of OEM start capacitors, reducing the number of SKUs a technician needs to carry in the field.
Key Specifications
- Capacitance Range: 145–175 Microfarads (MFD/µF)
- Voltage Rating: 220/250VAC
- Form Factor: Round
- Type: Start Capacitor
- Brand: Mars (Motor & Armature Run Smooth)
- Part Number: 11949
Features & Benefits
- Wide capacitance range (145–175 MFD) for broad cross-reference compatibility
- Dual voltage rating (220/250VAC) suits a variety of single-phase motor applications
- Round housing for straightforward mounting and replacement
- Designed for intermittent-duty start cycle use — protects motor windings from heat buildup
- Trusted Mars quality for long service life and consistent performance
Common Applications
- Central air conditioner compressor motors
- Heat pump compressor motors
- Condenser fan motors
- Refrigeration compressor motors
- Single-phase PSC and capacitor-start motor circuits
Installation Notes
Always verify the existing capacitor’s MFD rating and voltage before replacement. The replacement capacitor’s voltage rating must meet or exceed the original specification. Start capacitors are rated for intermittent duty only — ensure the motor’s start relay or potential relay is functioning correctly to disconnect the start capacitor once the motor reaches operating speed.
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