Overview
The Aerovox Z50S3700N22 is a discontinued motor run capacitor rated at 0.75 microfarad (µF) and 370 volts AC. Built with oil-filled metal construction, this Z50-series capacitor has become an industry standard for HVAC systems, motor starters, and industrial equipment. Though Aerovox ceased independent operations in 2018, millions of these capacitors remain in service, and replacement demand is steady among maintenance professionals.
Key Features
- Oil-filled metal-can construction for reliable motor run performance
- Compact 1.25-inch round form factor (Z50 designation) for easy mounting
- Rated for 370V AC applications including HVAC compressors and industrial motor starters
- Designed to meet EIA-456-A performance standards for motor run applications
- Proven durability in demanding HVAC and industrial environments
Technical Specifications
- Capacitance: 0.75 µF
- Voltage Rating: 370V AC
- Frequency: 50/60 Hz
- Case Style: Z50 (1.25″ round, oil-filled)
- Mounting: 4-terminal oval base design
- Performance Standard: EIA-456-A
- Application Type: Motor run
- Dielectric: Metallized polypropylene with epoxidized soybean oil
Typical Applications
- Air conditioning unit compressor motors
- HVAC heat pump systems
- Three-phase industrial motor starters
- Pool and well pump motors
- Refrigeration compressor run circuits
- Ceiling fan and garage-door opener motor circuits
Compatibility & Replacements
Compatible With
- HVAC compressor units designed for 370V run capacitors
- Industrial motor control circuits rated 370V AC
- Refrigeration and air conditioning systems from the 1980s–2010s era
- Equipment originally specified for Aerovox Z-series motor run capacitors
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or HVAC technician before ordering, as direct replacement depends on matching capacitance (µF), voltage (VAC), frequency (Hz), and physical mounting dimensions. Similar Aerovox models in the Z50 and Z23 series use the same form factor; consult the original equipment documentation to confirm exact cross-references.
Works With
- Any 370V AC motor circuit requiring a 0.75 µF run capacitor
- Standard HVAC and industrial control systems compatible with oil-filled metal-can capacitors
- Equipment using EIA-456-A rated motor run components
- Legacy and modern HVAC systems that support Z50-form-factor capacitors
