{"product_id":"industrial-71a8473-001d-autotransformer-ballast","title":"Industrial 71A8473-001D Autotransformer Ballast","description":"\u003cdiv\u003e\u003cp\u003ePhilips Advance 71A8473-001D Core \u0026amp; Coil Ballast Kit is a 400-watt High-Pressure Sodium ballast designed as a constant-wattage autotransformer (CW\/CWA) for S51 lamps. This open-core, magnetic ballast supports quad-tap input voltages of 120, 208, 240, or 277 VAC at 60 Hz, enabling flexible installation in fixtures powered from different parts of the electrical distribution. Identified in catalogs as a Core \u0026amp; Coil HID ballast kit, the 71A8473-001D carries the ANSI code S51 (also listed as M169\/S51 in some references), confirming compatibility with 400W S51 HPS lamps. As part of the Advance\/Philips ballast family, it is intended for use in luminaires that require a 400W HID ballast with a core-and-coil design and a CW autotransformer configuration. Typical applications include lighting installations that require reliable 400W HID performance with multi-voltage operation, such as industrial, commercial, and outdoor fixtures that use HPS technology. The kit designation reinforces its role as a field-replaceable ballast component compatible with standard 400W S51 HPS lamps and common fixture configurations that accept Philips Advance core-and-coil ballasts.\u003c\/p\u003e\u003c\/div\u003e","brand":"Advance","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51657026568494,"sku":null,"price":109.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_257be401-7bef-40f8-b27e-9de214049935.jpg?v=1769465315","url":"https:\/\/plgautomation.com\/products\/industrial-71a8473-001d-autotransformer-ballast","provider":"PLG Automation ","version":"1.0","type":"link"}