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The IOTA D48T provides emergency illumination at full light output, and operates in conjunction with the existing lamps and ballasts in facilities that have 48V central battery systems. The IOTA D48T is a combination solid state 48V inverter ballast and AC sensing relay. When the AC power fails, the D48T automatically switches to the emergency mode and operates one of the existing lamps at full light output for as long as the 48V battery capacity is available. Primary application of the IOTA D48T is in telephone company switching buildings.

Standby Input Voltage

(Dual) 120/277V, 60Hz

Standby Current Draw


Operating Input Voltage


Operating Current Draw


Lamps Operated

Most 2′-5′ single, bipin T8 & T12 HO or VHO fluorescent lamps

Initial Illumination

3000 lumens


2 lbs


UL Listedfind the UL Mark on this product

Advantages and Features

Product Advantages

  • Full Light Output
  • Designed for 48V Central Battery Systems


  • Will cold start and operate all specified lamps
  • Galvanized steel case
  • Dual Voltage 120/277V 60hz
  • Suitable for use in plenum fixtures
  • Meets or exceeds all NEC, IBC, and Life Safety Code Emergency Lighting Requirements
  • RoHS Compliant
  • 5 Year Warranty

Length: 9.5"

Width: 2.375""

Height: 1.5"

Mounting Center: 9.0"