01220.0-00

Toll free: 1-888-783-4611 (US & Canada only) · www.stegousa.com www.stegousa.com MECHANICAL HYGROSTAT MFR 012 >>Efficient condensation control >>Adjustable relative humidity range >>High switching capacity >>DIN rail mountable The MFR 012 electromechanical hygrostat is designed to control the relative humidity inside enclosures. When connected to an enclosure heater (dehumidifier), it will energize the heater at the humidity set point in order to raise the dew point. This helps prevent damage and malfunction of electronic components caused by condensation and corrosion.¹ The MFR 012 can also be used to control cooling fans, warning lights or other devices. TECHNICAL DATA Switching difference 4 %RH (± 3 % tolerance) - at 50 %RH Permissible air velocity 50 ft/sec (15 m/s) Contact type SPDT / change-over contact Service life > 50,000 cycles Min. Switching capacity 100 mA @ AC/DC 20 V Max. Switching capacity 5 A resistive @ AC 250 V DC 20 W Connection 3-pole terminal, clamping torque 0.5 Nm max.: solid wire - AWG 14 max. (2.5 mm²) stranded wire1 - AWG 16 max. (1.5 mm²) Housing plastic, UL 94V-0, light grey Mounting clip for 35 mm DIN rail, EN 60715 Mounting position vertical Operating / Storage temperature +32 to +140 °F (0 to +60 °C) / -40 to +140 °F (-40 to +60 °C) Operating / Storage humidity max. 95 %RH (non-condensing) Dimensions 2.64 x 1.97 x 1.5” (67 x 50 x 38 mm) Weight approx. 2 oz. (60 g) Protection type IP20 Approvals UL File No. E164102, GOST-R ¹ When connecting with stranded wires, wire end ferrules must be used. Heater Hygrostat MFR 012 Hygrostat MFR 012 Enclosure heater Filter fan, cooling equipment, signal device Wiring examples Part. No. Setting range 01220.0-00 35 to 95 %RH e.g. Filter Fan 08.08.2014 | Specifications are subject to change without notice. Suitability of this product for its intended use and any associated risks must be determined by the end customer/buyer in its final application. ¹ The critical relative humidity level for most components is 65%. Above 65% RH, condensation can form and cause malfunctions of electronic equipment. Long term, this can lead to corrosion and permanent damage of electronic components and systems.