Operating device 120V/60Hz 2x20/40W For fluorescent lamps Design: 33x41mm Hole spacing: 140mm Vacuum impregnated in polyester resin Plug-in terminal for cables: 0.5-1qmm For automatic luminaire wiring: insulation displacement terminals for cables H05V-U 0.5 tw 130 Protection class I The SL type devices are a transformer/ballast combination (leakage field transformer) which provides the necessary operating voltage for the lamp. A normal starter (220-240V) is required for these devices. Type: SL 40.333 Weight: 710g, Width: 41mm, Length: 155mm, Design: conventional, Protection class: I, For lamp type T26: Yes, For lamp type T38: Yes, Suitable for lamp power (2-lamp): 36-40W, Nominal voltage from/to: 120V, Height: 28mm, Suitable for lamp power (1-lamp): 18-20W