Square D 8911DPSG53V09 Definite Purpose Contactor 3P 50A

Product Description

The SQUARE D 8911DPSG53V09 is a 3-pole definite purpose contactor rated for 50 amps of inductive load, designed for use in HVAC, refrigeration, and other motor-control applications that require reliable, repetitive switching. The coil operates at 208 to 240 volts AC at 60 Hz and 220 volts AC at 50 Hz, making it compatible with standard single-phase and three-phase power distribution found across North American and select international installations. It ships in a NEMA 1 enclosed configuration, which protects internal contacts from dust and incidental contact in indoor environments. Licensed electricians and HVAC-R technicians are the primary installers of this type of contactor.

This contactor is suited for both residential and light commercial applications where a definite purpose switching device is required. Typical installation scenarios include rooftop units, condensing units, chiller panels, and compressor circuits. Horsepower ratings span a wide range: 3 HP at 115 volts AC, 10 HP single-phase and 15 HP three-phase at 230 volts AC, 30 HP at 460 volts AC, and 30 HP at 575 volts AC. This flexibility makes the 8911DPSG53V09 a practical replacement or upgrade contactor across multiple system voltage classes without requiring a different part number for each voltage tier.

Key Features

• 3-pole configuration handles single-phase and three-phase motor loads up to 50 amps inductive
• Coil rated for 208 to 240 volts AC at 60 Hz and 220 volts AC at 50 Hz
• NEMA 1 enclosed design provides indoor protection against dust and accidental contact
• Wide horsepower range: 3 HP at 115V AC through 30 HP at 460V and 575V AC
• Meets NEMA 1 standards for enclosed industrial and commercial control equipment

Compatibility

Designed as an OEM-style definite purpose contactor replacement for 3-pole, 50-amp inductive load applications operating on 208 to 240 volt AC coil circuits in HVAC, refrigeration, and motor control panels.

Installation Notes

Installation should be performed by a licensed electrician or qualified HVAC-R technician in accordance with the National Electrical Code (NEC) and any applicable local codes. Always disconnect and lock out power to the panel or unit before removing or installing a contactor. Verify coil voltage and pole configuration match the existing circuit before energizing. Do not exceed the published inductive load amperage rating for the application.