This is a Legrand CTRX3 3P 18A 1NO1NC 24V DC control relay, which is used as a switching control for low voltage 24 Volt DC electrical circuits. It is designed for use with a wide range of Legrand systems and circuits, and offers high performance, convenience and cost savings. The relay features a single common (C) and one normally open (NO) contact, an insulation voltage of 300V AC, an operational voltage of 24V DC, a voltage drop of 1.4V (Typ.), a power dissipation of 10 mW, a 0.2A carry current, and a 1A switching capacity. The switch is also rated to provide a long lasting service life of 20,000 operations, making it an ideal control solution for many applications.