Carlo Gavazzi RGS1P48V92ED Single Phase Relays 1-pole panel mount SCR, Proportional control, Operating voltage (Ue): 190 - 550 Vac (1200 Vp), Rated current (Ie): 90 Aac, Input: 0 - 5 / 1 - 5 / 0 - 10 Vdc, External supply: 24 Vdc/Vac, Built-in overvoltage protection