Industrial 71A5770-001D Core & Coil Ballast Kit

Philips Advance 71A5770-001D Core & Coil Ballast Kit is a magnetic HID ballast assembly rated for up to 250 watts, designed for 250 W metal halide lamps and identified by ANSI code M58. As a Core & Coil ballast in the Advance 71A family, it provides the ballast function for fixtures that use high-intensity discharge lamps, delivering regulated current to the lamp to maintain consistent light output and lamp life. The model number 71A5770-001D corresponds to the 250 W metal halide variant in the Core & Coil lineup and is marketed under the Philips Advance brand. This ballast kit is specified for 250 W maximum bulb wattage and uses traditional magnetic ballast technology, which relies on a laminated iron core and windings rather than switching electronics. It is suitable for installations that require a 250 W MH ballast with M58 compatibility, such as legacy industrial or outdoor luminaires that historically used this ballast family. The 71A5770-001D designation helps service technicians match replacements for legacy HID fixtures that specify ANSI M58 ballast requirements.