The electromechanical hygrostat MRF012 is designed to control enclosure heaters to raise the dew point when a critical relative humidity of 65% is exceeded, thereby effectively preventing condensation. Switch differential: 4% RH (±3% tolerance) Permissible air velocity: 15 m/s Contact type: Change-over Mechanical life: 100,000 cycles Minimum switching capacity: 20 V AC / 100 mA DC Maximum switching capacity: 250 V AC, 5 (1) A / 20 W DC EMC compliance: EN 55014-1, EN 55014-2, EN 61000-3-2, EN 61000-3-3 Connection: 3-pole terminal for 2.5 mm² solid wire (clamping torque max. 0.5 Nm); or 1.5 mm² stranded wire with ferrule Mounting: Clip for 35 mm DIN rail (EN 50022) Housing material: Plastic, UL94 V-0 rated, light grey Mounting position: Variable Operating temperature: 0 °C to +60 °C (+32 °F to +140 °F) Storage temperature: -20 °C to +80 °C (-4 °F to +176 °F) Protection rating: IP20 Housing color: As shown Material: Plastic Dimensions: 67 × 50 × 38 mm Package contents: 1 × Humidity controller