For electronic transformers and light bulbs (ohmic load). (Phase cut). With pressure changeover switch. Hum-free, short-circuit proof, with overload protection, lamp-friendly soft start. To be completed with: Central plate with rotary knob System M MEG5250-03../-04../-06.. Central plate with transparent cover and rotary knob M-Creativ MEG5250-3500. Central plate with rotary knob System Design MEG5250-60.., System Area MEG5250-40../-41../-42.. Note: Suitable for Merten MET transformers. Version: 20-315 W.