Tridonic 2D Emergency Module with a 5 pole technology: 4 pole changeover and a delayed action relay for switching the mains supply to ensure compatibility with the ballast. AC output optimised for TC-DD and TC-L lamps. DC output optimised for T8 lamps. Cathode heating optimised for compact lamps. Emergency testing by isolating only the unswitched supply. Small size (28x39 mm cross section) 10w-16Watts, 230-240 Volts, 50-60hz, Article Number 89818556,Tridonic Code : EM33A. Length 200mm, Height 28mm, Width 39mm.