Mechanical Hygrostat MFR 012 Adjustable relative humidity range High switching capacity DIN rail mountable ACTUAL SIZE The MFR 012 is designed to control the relative air humidity inside of enclosures. When connected to an enclosure heater, (de-humidifier), it will turn the heater on at the set humidity level 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 MFR 012 Contact type: Contact resistance: Service life: Change-over contact <10mW 50,000 cycles Minimum switching capacity: Maximum switching capacity: 100mA @ AC/DC 20 V 5A @ AC 230 V (resistive load) 0.2A @ AC 230 V (inductive load at cos j = 0.8) DC 20W 1.5" (38mm) Part No.: 01220.0-00 35 - 95% ( 3.0%) relative humidity Adjustment range: Switching difference (hysteresis): Approx. 4% RH @ 50% relative humidity Permissible air velocity: 50 ft/sec (15 m/s) Maximum switching voltage: 250 VAC Attention: 250 V should only be switched in a non-condensing environment! 1.97" (50mm) 90 EN 55014-1-2, EN 61000-3-2, EN 61000-3-3 Connection: Mounting: Dimensions (H x W x D): Housing: Weight: Operating temperature: Storage temperature: Protection type: 3-pole terminal, 3 x AWG 14 max. (2.5 mm) Clip for 35 mm DIN rail (EN 50022) 2.64 x 1.97 x 1.5" (67 x 50 x 38 mm) Plastic, UL94V-O 2 oz. (60 g) 32 to 140F (0 to 60C) -4 F to 176 F (-20 to 80 C) IP 20 Application examples: Electrical & Electronic enclosures Telecommunication systems Display panels Ticket dispensers Automatic teller machines (ATM's) Access & Parking control systems 70 60 % r.F/RH 2 1) 40 50 L 3 The critical relative humidity for most components is 65%. Above 65% RH, condensation can cause malfunction of electronic equipment. Long-term, this can lead to corrosion and permanent damage of electronic components and systems. MFR012-11-05/US EMI/EMC compliance: 2.64" (67mm) 80 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. STEGO, Inc. * 2270 Northwest Parkway * Suite 170 * Marietta, GA 30067 * Tel: (770) 984-0858 * Fax: (770) 984-0615 Toll free: 1-888-783-4611 (US & Canada only) * www.stegousa.com