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The RECTORSEAL n4128 is a 3-pole contactor rated at 50 amps and 24 volts coil voltage, designed for load switching in HVAC and light commercial electrical systems. Contactors of this type control the high-voltage circuit to compressors, condensers, and other motor loads by opening and closing contacts in response to a low-voltage control signal. Licensed HVAC technicians and electricians are the primary installers. The n4128 provides reliable switching performance in demanding duty cycles typical of air conditioning and refrigeration equipment.
This contactor is suited for residential and light commercial HVAC applications where a 3-pole switching configuration is required. Common installation scenarios include condensing unit compressors, fan motors, and similar motor-load circuits that require a 24-volt coil signal to energize. Its 50-amp contact rating covers the load demands of most residential and small commercial compressor applications.
Designed as an OEM-style replacement contactor for residential and light commercial HVAC systems requiring a 3-pole, 50-amp, 24-volt coil contactor.
Installation should be performed by a licensed HVAC technician or electrician. Disconnect and lock out all power to the unit before removing or installing any contactor. Verify the replacement contactor coil voltage and amperage rating match the existing equipment specifications before energizing. Work should comply with applicable NEC requirements and local electrical codes.
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