▸ Key Features:
• Core and coil magnetic ballast for 400W high pressure sodium lamps
• ANSI S51 / M169 specification compatibility
• Constant wattage autotransformer (CWA) circuit type
• Quad‑tap input voltage: 120/208/240/277V at 60 Hz
• Includes pre‑wired ignitor, dry film capacitor, and mounting bracket kit
▸ Applications:
• Industrial and commercial HID lighting fixtures
• Warehouse, street, and parking lot lighting systems
• Replacement ballast kits for HPS luminaires
• Outdoor and high‑bay lighting installations
▸ Alternative Model Numbers:
71A8453‑001D
71A8443‑001D
71A8241‑001D
Advance 400W S51 Ballast Kits
▸ Common Misspellings or Phrasing:
71A8473001D
Advance HPS 400W Ballast
S51 Core Coil Ballast
Advance Sodium Ballast Kit
Philips Advance 71A8473
