Phase Monitor Relay, Contact Form DPDT, Contact Rating (AC) 10 A @ 277V, Contact Rating (DC) 10 A @ 30V, Current Rating 10 A, Input Voltage 190 to 500V AC, Monitored Parameters Overvoltage, Phase Loss, Phase Reversal, Phase Unbalance, Undervoltage, Number of Pins 12, Restart Auto, Manual, Restart Time Delay 1 to 300 sec, Mounting Style DIN Rail, Body Depth 2.4 in, Body Height 3.5 in, Body Width 2.1 in, Electrical Operating Durability 100,000, For Use With Sensors, Frequency 50/60 Hz