Stego MFR 012 Catalog Page

Technical Data

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MFR012/06-08/US

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.

MFR 012 Mechanical Hygrostat

Regulating and Monitoring

Efficient condensation control

Adjustable relative humidity range

High switching capacity

DIN rail mountable

The MFR 012 electromechanical thermostat 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.

Switching difference 4% RH (± 3% tolerance) - at 50% RH

Permissible air velocity 50 ft/sec (15m/s)

Contact type SPDT / change-over contact

Contact resistance < 10m

˜

Service life > 100,000 cycles

Min. Switching capacity 100mA @ AC/DC 20V

Max. Switching capacity 5A resistive / 1A inductive @ 250VAC

DC 20W

EMC acc. to EN 55014-1-2, EN 61000-3-2, EN 61000-3-3

Connection 3-pole terminal, clamping torque 0.5Nm max.:

solid wire - AWG 14 max. (2.5mm²)

stranded wire (with wire end ferrule) - AWG 16 max. (1.5mm²)

Housing plastic, UL 94V-0, light grey

Mounting clip for 35mm DIN rail, EN 60 715

Mounting position vertical

Operating temperature +32 to +140°F (0 to +60°C)

Storage temperature -4 to +176°F (-20 to +80°C)

Dimensions 2.64 x 1.97 x 1.5” (67 x 50 x 38mm)

Weight approx. 2 oz. (60g)

Protection type IP20

Approvals UL File No. 164102

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.

Part No. Setting range

01220.0-00 35 to 95% RH

1.5” (38 mm)

1.97” (50 mm)

2.64” (67 mm)

Enclosure heater

Filter fan, cooling equipment, signal device