Mitsubishi M80 AC Reactor DH-AL-37K

DH-AL-37K is a Mitsubishi Electric AC reactor (line reactor) used in CNC servo/spindle drive power systems, especially with MDS-EH / MDS-DH series converter units.

Description

• Manufacturer: Mitsubishi Electric
• Series: DH-AL series (400V CNC systems)
• Model: DH-AL-37K
• Type: AC Line Reactor (input reactor)
• Rated Capacity: 37 kW class

Purpose / Function

DH-AL-37K is not a drive or inverter. It is a passive inductive component installed on the AC input side of CNC power supplies.

It is used to:

• Reduce harmonic distortion generated by the converter
• Limit inrush current during power ON
• Protect the MDS power supply rectifier section
• Improve power factor and electrical stability
• Reduce stress on diodes, capacitors, and upstream supply

Compatible CNC Power Supplies

From Mitsubishi specifications, it is matched with:

• MDS-EH-CV-370
• MDS-DH-CV-370

Electrical Ratings (typical)

• Rated current: ~75 A
• Voltage class: 380–480 VAC, 3-phase
• Frequency: 50/60 Hz
• Installation: Series connection on AC input line

System Position

AC mains → DH-AL-37K reactor → MDS-EH / DH CV power supply → DC bus → servo/spindle drives