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OSRAM 51485 is a rapid start T5HO high temperature ballast with wire leads.  The Sylvania OSRAM QHE 2X54T5HO-347-480 PSN-HT 2 lamp 347-480V T5HO ballast is a high efficiency, high ambient, programmed start T5HO electronic ballast for 1 or 2 lamp fixtures. The OSRAM QHE 2X54T5HO-347-480 PSN-HT ballasts are specifically designed for high ambient temperature applications. The ballast may be operated at case temperatures of up to 90°C, making them an ideal choice for high ambient settings such as industrial high-bay lighting.


 Brand: OSRAM
Starting Factor: Instant Start
Light: Fluorescent Ballast Factor: High
Lamp: FP54T5HO Power Factor: >0.97
Lamp #: 2 Frequency: 50/60Hz
Length:    16.73" Voltage: 347-480V
Width:    1.18" Connection: Parallel
Height:    1.00" Certifications: UL, ROHS



  • Lamp Striation Control
  • Over 120 LPW (lumens/watt)
  • Lowest power T8 I.S. Systems
  • Universal voltage (347-480V)
  • Min. Starting Temp: -20°F(-29°C)
  • <10% THD
  • Virtually eliminates lamp flicker
  • Lead-free solder and manufacturing


  • 5 year limited Manufacturer Warranty
  • 30 day Seller Warranty


QHE 2X54T5HO-347-480 PSN HT Ballast Data Sheet