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01250.0-00
01250 0 00





New: Mechanical hygrostat
MFR 012
The hygrostat is used to prevent condensate and regulates heating and fans. From a critical relative air humidity of 65 %, the temperature is increased so that the dew point is raised.
- Adjustable relative air humidity
- Changeover contact (heating or cooling)
- High switching capacity
- Clip mounting




Overview technical data
Device type | Hygrostat |
Setting range | 30 % RH - 95 % RH |
Contact type | Snap-action contact |
Protection type | IP30 |
Casing | Plastic to UL94 V-0, light grey |
AC/DC | AC |
Operating voltage tolerance maximum | AC 250 V |
Inrush current maximum | 16 A |
Inrush current duration | 10 s |
Switching capacity | AC 5 A DC 20 W |
Switching current ohmic | 10 A |
Reference voltage ohmic maximum | 250 VAC |
Reference voltage 2 ohmic maximum | 120 VAC |
Switching current dc ohmic | 0.6 A |
Reference voltage dc ohmic maximum | 30 VDC |
Reference voltage minimum | 20 V |
Switching current | 0.1 A |
Service life | 10 A 10000 cycles 6 A 50000 cycles |
Switching differential | 4 % RH |
Switching differential tolerance | ± 1,5 % RH |
Operating temperature | 0 °C - 60 °C |
Operating humidity | ≤95 % RH |
Storage humidity | ≤95 % RH |
Storage temperature | -40 °C - 60 °C |
Connection type | Connection terminal (push-in) |
Connection | 3 x stranded wire 1.0 - 2.5 mm² (with wire end ferrule) and rigid wire 1.0 - 2.5 mm² |
Design | Changer |
Mounting | Clip for 35 mm DIN rail, EN 60715 |
Height | 84 mm |
Width | 35 mm |
Depth | 43 mm |
Weight | 45 g |
Note | Switching differential related to 50 % rH. Wire end ferrules must be used for connections with stranded wires. |
Product variants
Article number | Device name | Device type | Series | Setting range | Contact type | Protection type | Casing | AC/DC | Operating voltage tolerance maximum | Inrush current maximum | Inrush current duration | Switching capacity | Switching current ohmic | Reference voltage ohmic maximum | Reference voltage 2 ohmic maximum | Switching current dc ohmic | Reference voltage dc ohmic maximum | Reference voltage minimum | Switching current | Service life | Switching differential | Switching differential tolerance | Operating temperature | Operating humidity | Storage humidity | Storage temperature | Connection type | Connection | Design | Mounting | Height | Width | Depth | Weight | Note | Request | CAD | Datasheet |
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01250.0-00 | New: Mechanical hygrostat | Hygrostat | MFR 012 | 30 % RH - 95 % RH | Snap-action contact | IP30 | Plastic to UL94 V-0, light grey | AC | AC 250 V | 16 A | 10 s | AC 5 A DC 20 W | 10 A | 250 VAC | 120 VAC | 0.6 A | 30 VDC | 20 V | 0.1 A | 10 A 10000 cycles 6 A 50000 cycles | 4 % RH | ± 1,5 % RH | 0 °C - 60 °C | ≤95 % RH | ≤95 % RH | -40 °C - 60 °C | Connection terminal (push-in) | 3 x stranded wire 1.0 - 2.5 mm² (with wire end ferrule) and rigid wire 1.0 - 2.5 mm² | Changer | Clip for 35 mm DIN rail, EN 60715 | 84 mm | 35 mm | 43 mm | 45 g | Switching differential related to 50 % rH. Wire end ferrules must be used for connections with stranded wires. | MFR012-01250.0-00-Datasheet-EN.pdf |