Square D 8911DPSO43V09 Definite Purpose Contactor 3P 40A

Product Description

The SQUARE D 8911DPSO43V09 is a three-pole definite purpose contactor rated for 40 amps of inductive load. It accepts a coil voltage of 208 to 240 volts AC at 60 Hz and 220 volts AC at 50 Hz, making it suitable for both domestic and international frequency applications. The open enclosure design allows for straightforward integration into existing panel or equipment enclosures. Licensed HVAC technicians and electricians install this contactor in compressor, motor, and load-switching circuits where a factory-matched or OEM-style replacement is required. Its horsepower ratings span single-phase and three-phase configurations across multiple voltage levels.

This contactor is applied in residential and light commercial HVAC systems, refrigeration equipment, and motor control applications where a definite purpose switching device is specified. Typical installations include condensing unit compressor circuits and multi-phase motor starters. Rated horsepower values include 3 HP at 115 volts AC, 7.5 HP and 10 HP at 230 volts AC single-phase and three-phase respectively, 20 HP at 460 volts AC, and 25 HP at 575 volts AC, covering a broad range of load scenarios across commercial and residential equipment.

Key Features

• Three-pole configuration handles multi-phase inductive loads up to 40 amps
• Coil rated for 208 to 240 volts AC at 60 Hz and 220 volts AC at 50 Hz
• Open enclosure design for integration into customer-supplied enclosures or equipment panels
• Multi-voltage horsepower ratings support single-phase and three-phase motor applications
• Direct replacement form factor for definite purpose contactor applications in HVAC and refrigeration equipment

Compatibility

Designed as an OEM-style replacement for three-pole definite purpose contactor applications in HVAC, refrigeration, and motor control equipment requiring a 208 to 240 volt coil and 40 amp inductive load rating.

Installation Notes

Installation should be performed by a licensed electrician or HVAC technician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit at the disconnect before removing the existing contactor or making any wiring connections. Verify coil voltage, pole count, and amperage rating match the application before installing. Do not exceed the listed inductive load amperage rating for the connected load.