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MITSUBISHI Power Supply
Brand: MITSUBISHI -
Cat: Power Supply
Code:MDS-B-CV-300
| Combination name | Availability | Price |
|---|---|---|
DC Bus Converter / Power Supply Unit – MITSUBISHI MDS-B-CV-300
The MDS-B-CV-300 is a DC bus converter unit (“Converter Unit”) from the MDS-B series by Mitsubishi Electric, used in Mitsubishi CNC drive systems (series M64, M700, M70, E60, E68 and associated machines). The unit rectifies and filters the three-phase mains input voltage to generate the DC bus that simultaneously powers all MDS-B servo and spindle modules installed in the cabinet. The suffix 300 indicates a rated capacity of approximately 30 kVA, placing this unit in the upper-mid range of the product line. No standard additional accessories are included; hardware revisions may differ in signal connector layout.
The DC bus converter is the backbone of the entire drive system power supply: without a stable bus voltage, neither the servo axes nor the spindle can be controlled. A failure of this unit completely shuts down the machine tool; incorrect or unstable bus voltages cause following errors, over/under-voltage alarms on the axes and, in the worst cases, cascading damage to the connected servo modules.
Mitsubishi Electric is the electrical and industrial automation division of the Japanese Mitsubishi conglomerate, active in the CNC sector with the MELSERVO and Mitsubishi CNC systems (M, E, C series). The MDS-B series is a previous-generation servo/spindle drive platform, now legacy / discontinued and superseded by the MDS-C1, MDS-D and MDS-EJ series; official support is limited and sourcing relies mainly on used stock or specialist repair services.
Main Technical Specifications
| Type | DC Bus Converter / Power Supply Unit (Converter Unit) |
| Part number | MDS-B-CV-300 (MDSBCV300) |
| Brand | Mitsubishi Electric |
| Known application | Mitsubishi CNC series M64, M700, M70, E60, E68; machining centres and lathes with MDS-B drives |
| Function | Three-phase AC to common DC bus conversion for MDS-B servo and spindle modules |
| Input voltage | 3 × 200–230 V AC, 50/60 Hz (three-phase) |
| Rated capacity | ~30 kVA |
| DC bus output voltage | ~280–325 V DC |
| Input current | ~80–100 A AC |
| Interfaces | Three-phase power terminal block; DC bus to servo/spindle modules; status/alarm signal connectors |
| Weight | ~10–20 kg |
| Dimensions | ~300–450 mm × 150–300 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
