<h2>Overview</h2>
<p>The <strong>Advance 71A8402</strong> is a magnetic HID (high-intensity discharge) transformer ballast engineered for metal halide and similar HID lamp applications. This core and coil ballast unit is designed to regulate current flow and provide stable ignition for professional lighting installations in industrial, commercial, and specialized environments. The 71A8402 represents proven ballast technology from Advance (now part of Philips/Signify), a manufacturer with over 75 years of experience in lighting electronics.</p>
<h2>Key Features</h2>
<ul>
<li>Magnetic HID core and coil design for reliable lamp ignition and current regulation</li>
<li>Industrial-grade transformer construction suitable for 460W applications</li>
<li>Primary current rating of 35A for stable input power management</li>
<li>Secondary current rating of 70A for optimized lamp circuit support</li>
<li>Proven platform for metal halide and HID lamp compatibility</li>
<li>Used, tested condition—fully functional and ready for installation</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li>Model: 71A8402</li>
<li>Ballast Type: Magnetic HID Core and Coil</li>
<li>Power Rating: 460W</li>
<li>Primary Current: 35A</li>
<li>Secondary Current: 70A</li>
<li>Manufacturer: Advance (Philips/Signify)</li>
<li>Application: Metal Halide and HID Lamps</li>
<li>Ballast Family: Magnetic HID Class</li>
</ul>
<h2>Typical Applications</h2>
<p>The Advance 71A8402 ballast serves a wide range of professional lighting installations:</p>
<ul>
<li>Industrial facility lighting and warehouse illumination</li>
<li>Commercial outdoor and parking structure lighting</li>
<li>Sports facility and stadium high-intensity discharge systems</li>
<li>Retrofit and replacement projects for legacy HID lighting</li>
<li>Custom specialized lighting environments requiring stable ballast regulation</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Metal halide lamp systems (M58, M59, M129 and similar HID fixtures)</li>
<li>Multi-voltage transformer installations (standard industrial power supplies)</li>
<li>Core and coil ballast wiring harnesses and mounting frames</li>
<li>Industrial-grade lighting control systems</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>71A8473-001D (direct replacement per manufacturer cross-reference)</li>
<li>Legacy 71A8402 units in existing installations</li>
</ul>
<h3>Works With</h3>
<ul>
<li>Standard industrial three-phase or single-phase power systems</li>
<li>Metal halide lamp assemblies and ignition circuits</li>
<li>Core and coil ballast capacitor banks and protection networks</li>
<li>Field-wiring and termination standards per NEC and UL guidelines</li>
</ul>
