Square D 8903LO20V04 2 Pole Lighting Contactor 277V

Product Description

The SQUARE D 8903LO20V04 is a 2-pole, electrically held lighting contactor designed for switching lighting loads in commercial and industrial electrical distribution systems. It operates on a control circuit voltage of 277 volts AC at 60 Hz and carries a rated amperage of 20 amps for tungsten loads and 30 amps for fluorescent loads. The contactor ships in an open configuration with no enclosure, meaning it must be installed inside a suitable field-supplied enclosure or panel. The 2NO contact configuration makes it a direct-fit solution for standard lighting control circuits where a normally open switching arrangement is required. Licensed electricians handle installation and commissioning of this device.

This contactor is suited for commercial lighting control applications including office buildings, warehouses, retail spaces, and industrial facilities where fluorescent or tungsten lighting banks need to be switched from a central control point. The electrically held design keeps contacts closed as long as control voltage is applied, making it appropriate for circuits managed by building automation systems, time clocks, or manual lighting control panels. Its open-style form factor allows integration into existing enclosures or custom panel builds where space and layout are already defined by the installer.

Key Features

• Electrically held operation maintains contact closure while control voltage is present
• 2NO contact configuration for standard normally open lighting switch circuits
• Rated 20 amps for tungsten loads and 30 amps for fluorescent loads
• Control circuit voltage of 277 volts AC at 60 Hz matches common single-phase-to-neutral commercial lighting circuits
• Open enclosure design allows field installation into customer-supplied panels or enclosures
• UL Listed, CSA certified, and RoHS compliant

Compatibility

Designed as an OEM-style replacement or new-installation lighting contactor for commercial and industrial lighting control panels requiring a 2-pole, electrically held, 277-volt open-style contactor.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the circuit before handling or mounting the contactor. Because this unit ships without an enclosure, it must be mounted inside a field-supplied enclosure with an appropriate NEMA rating for the environment. Verify that the control circuit voltage source matches the 277-volt AC rating before energizing.