Carlo Gavazzi RM1E60V50 Solid State Relays 1-pole panel mount SSR, Proportional control (Phase angle), Operating voltage (Ue): 410 - 660 Vac (1400 Vp), Rated current (Ie): 50 Aac, Input: 0 - 10 Vdc, External supply: 24 Vdc, Built-in overvoltage protection