The RGC1P48V50ED is a 1-pole DIN rail mounted SCR proportional control relay with operating voltage range of 190-550 VAC (1200 VP) and rated current of 50 AAC. It features multiple input options (0-10/0-5/1-5 VDC), accepts 24 VDC/VAC external supply, and includes built-in overvoltage protection.