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MITSUBISHI Servo Drive
Brand: MITSUBISHI -
Cat: Servo Drive
Code:MR-S3-100AA-E01
| Combination name | Availability | Price |
|---|---|---|
AC Servo Amplifier – MITSUBISHI MR-S3-100AA-E01
The MR-S3-100AA-E01 is a digital AC servo amplifier (“AC Servo Amplifier”) manufactured by Mitsubishi Electric under the MELSERVO® product line, European variant (E01 suffix). The internal stock code is MRS3100AAE01. This unit belongs to the MR-S3 series, designed for digital control of AC brushless servo motors, typically paired with Mitsubishi MELDAS CNC systems and other numerically controlled machine tools of the 1990s and 2000s. It regulates speed, torque, and position of the connected servo motor via encoder feedback; the “AA” variant identifies a specific output and supply configuration within the series, while “E01” confirms European directive compliance.
The servo amplifier is the core of the machine tool’s axis system: it receives position or speed references from the CNC, closes the control loop by comparing the motor encoder signal, and generates the output current required to maintain the programmed trajectory with the specified accuracy. Without a functioning servo amplifier, the controlled axis becomes inert or enters a fault state: the machine cannot perform any machining operation and the CNC immediately raises a position error or drive communication fault, halting production.
Mitsubishi Electric is a Japanese multinational active in industrial automation since the post-war era, with the MELSERVO® line as one of the historic references in motion control for CNC machine tools. The MR-S3 series is legacy / discontinued: Mitsubishi progressively replaced these units with the MR-J2, MR-J3, and MR-J4 generations, which remain supported today. This part is available exclusively as used, NOS (new old stock), or through specialist repair services.
Main Technical Specifications
| Type | Digital AC servo amplifier (AC Servo Amplifier) |
| Part number | MR-S3-100AA-E01 (MRS3100AAE01) |
| Brand | Mitsubishi Electric – MELSERVO® line |
| Known application | CNC machine tools with MELDAS control (Mitsubishi); machining centres, lathes and milling machines with AC servo axes, 1990s–2000s |
| Function | Position, speed, and torque regulation of AC brushless servo motor; closed-loop control via encoder feedback |
| Rated power | ~1.0 kW |
| Supply voltage | 3× AC 200–230 V, 50/60 Hz (typical MR-S3 series) |
| Feedback | Serial or incremental encoder from servo motor |
| Interfaces / connectors | CN1 connector (CNC command), CN2 connector (motor encoder), power terminal strip; analogue reference ±10 V or pulse train input |
| Variant / revision | E01 – European variant (CE approval) |
| Weight | ~1.5–3.0 kg |
| Dimensions | ~150×250×120 mm |
| Production status | Legacy / discontinued — available as used, NOS or through specialist repair only |
