Overview
The Philips Advance 71A6051-A is a CW (constant wattage) autotransformer ballast engineered to power 400W M59 metal halide lamps in commercial and industrial applications. This magnetic ballast delivers stable, regulated lamp current for consistent performance across multiple AC voltage inputs. Used units are available in tested, fully functional condition—ideal for cost-conscious maintenance and facility upgrades.
Key Features
- Constant Wattage (CW) autotransformer regulation for stable lamp current
- Multi-tap design supports 120, 208, 240, and 277 VAC at 60 Hz
- Magnetic core-and-coil ballast with dry-film capacitor
- M59 metal halide lamp compatibility (400W)
- Industrial-temperature operating range up to 221°F (typical for series)
- Compact, bracket-mountable form factor
Technical Specifications
- Power Rating: 400W nominal (M59 lamp)
- Input Voltages: 120 VAC, 208 VAC, 240 VAC, 277 VAC (60 Hz)
- Output: Regulated constant wattage
- Core Type: Magnetic with autotransformer coupling
- Capacitor: Dry-film, multi-tap configuration
- Lamp Type: M59 (400W metal halide)
- Operating Temperature Range: Up to 221°F ambient
- Mounting: Standard bracket (included or field-mountable)
- Manufacturer: Philips Advance Ballast
- Part Number: 71A6051-A
Typical Applications
- Warehouse and high-bay industrial lighting
- Commercial facility and parking structure fixtures
- Athletic facility and outdoor lighting systems
- Manufacturing plant general illumination
- Retrofit and replacement ballast kits
Compatibility & Replacements
Compatible With
- M59 400W metal halide lamps
- Standard magnetic ballast lighting fixtures
- 120–277 VAC 60 Hz electrical systems
- Multi-tap wiring configurations
- Industry-standard ballast mounting brackets
Replaces / Drop-In Replacement For
Verify compatibility with your original ballast nameplate and fixture manufacturer documentation before ordering. The 71A6051 series supersedes earlier Advance magnetic ballast models; consult your system integrator or lighting technician to confirm exact model interchangeability.
Works With
- Standard magnetic ballast control circuits
- AC utility power 50/60 Hz systems
- Dry-film capacitor banks for power factor correction
- Multi-tap voltage selectors and wiring harnesses
