SOLID STATE RELAYS - SSRS 3-POLE PANEL MOUNT SSR, ZERO-CROSS SWITCHING WITH OVER-TEMPERATURE PROTECTION, OPERATING VOLTAGE (UE): 42 - 660 VAC (1600 VP), RATED CURRENT (IE): 55 AAC, CONTROL VOLTAGE (UC): 24 - 275 VAC / 24 - 50 VDC, BUILT-IN OVERVOLTAGE PROTECTION