Description
DH-AL-18.5K is a Mitsubishi Electric AC reactor (line reactor) used in CNC drive systems, especially with MDS-EH / MDS-DH series power supply units.
Description
- Manufacturer: Mitsubishi Electric
- Series: DH-AL series (400V CNC systems)
- Model: DH-AL-18.5K
- Type: AC Line Reactor (input reactor)
- Rated Capacity: 18.5 kW class
Purpose / Function
The DH-AL-18.5K is a support component installed on the AC input side of CNC power supplies.
It is used to:
- Suppress harmonic distortion from CNC converter units
- Limit inrush current when power is switched ON
- Protect the MDS power supply (rectifier section)
- Improve power factor and reduce grid disturbances
- Increase reliability and lifespan of drive system components
Compatible Systems
It is typically matched with:
- MDS-EH-CV-185
- MDS-DH-CV-185
This is a standard pairing defined by Mitsubishi for CNC power supply sizing.
Electrical Rating (typical)
- Capacity: 18.5 kW
- Voltage class: 380–480 VAC, 3-phase
- Frequency: 50/60 Hz
- Use: Input side reactor (series connection with AC supply)
System Position
AC mains → DH-AL-18.5K reactor → MDS-EH / DH CV power supply → DC bus → servo/spindle drives