Voltage Sensing Relays and Monitors: Type - Voltage Monitor; Operation - Electromechanical; Phase - 3-Phase; Detection - Phase Failure/sequence, Voltage Unbalance, Undervoltage; Line Voltage - 480V AC; Voltage Range - 208-480V; Frequency - 50/60 Hz; Contact Configuration - SPDT; Contact Rating - 5A @ 250V; Mounting - DIN Rail; Enclosure - Plastic; Additional Information - Operating Temperature: -20 to 50 deg C (-4 to 122 deg F); Manufacturer Series - 84873