600V Max Primary Electrical Insulation, Heavy-Duty Solid Metal Clad Frame Shell, Core-and-Coil Fluorescent Lighting Ballast Assembly, High-Permeability Laminations Matrix, 120VAC Primary Supply Voltage Input, -20°C to +75°C Standard Lighting Environment Window | Commercial-grade electromagnetic line stabilizing transformer ballast manufactured by Advance Transformer Company (Signify/Philips) utilizing a high-temperature structural compound embedding shield, optimized to provide linear lamp starting current paths and completely isolate vulnerable downstream structural light fixtures from continuous voltage surge tracking loops | Industry Exact Equivalents: Advance A8659-1, Advance Transformer A8659-1, Philips Advance A8659-1 | Industry Functional Cross-References: Universal Lighting Ballast 413-B-TC, General Electric 8G1022, Robertson G1010