Mitsubishi Electric MR-J4-22KA4 — MELSERVO J4 Servo Amplifier
The Mitsubishi Electric MR-J4-22KA4 (ordering code MRJ422KA4) is a high-power servo amplifier from the MELSERVO J4 series, rated 22 kW / 63 A for the 400 V class (380–480 V AC, 3-phase). It drives Mitsubishi HK series servo motors in the 22 kW class with sinusoidal PWM / current control, delivering the speed, torque and precision that MELSERVO J4 is known for in high-performance automation.
This genuine Mitsubishi unit is tested before dispatch and is a direct spare or replacement for J4-series servo systems in heavy industrial machinery.
Your Benefits at a Glance
- 22 kW high-power rating — 63 A rated current, 400 V class (380–480 V AC, 3-phase)
- Genuine Mitsubishi Electric — MELSERVO J4 series quality, Japan-made
- RS-422 / RS-485 communication — standard serial interface for control and monitoring
- Advanced motion functions — vibration suppression II, adaptive filter II, robust filter, auto-tuning, one-touch tuning
- Safety function — Safe Torque Off (STO) as standard
- Full closed-loop ready — load-side encoder interface for absolute precision
- Protection & diagnostics — overcurrent, overvoltage, undervoltage protection; drive recorder and machine diagnostics
- Tough Drive design — increased tolerance to voltage fluctuations and environmental conditions
Key Features
High-Performance Servo Control Sinusoidal PWM / current-control method provides smooth torque and low noise across the speed range. Speed and torque control modes, Super Trace control and lost-motion compensation deliver fast, accurate axis response.
400 V Class, 3-Phase or DC Input The amplifier accepts 380–480 V AC (3-phase) or 283–340 V DC input, giving flexibility in common-bus and direct-AC powered systems. Forced-ventilation cooling supports continuous high-power operation.
Safety & Reliability Standard Safe Torque Off (STO) simplifies machine safety integration. Comprehensive protection functions and the drive recorder help diagnose faults quickly and keep the machine running.
System Integration RS-422/485 interface allows straightforward connection to PLCs and motion controllers; the load-side encoder interface supports full closed-loop control with linear or rotary encoders for maximum precision.
Technical Specifications
表格
| Item | Specification |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Product Series | MELSERVO J4 |
| Model | MR-J4-22KA4 (MRJ422KA4) |
| Product Type | AC servo amplifier / motion drive |
| Rated Output | 22 kW |
| Rated Current | 63 A |
| Supply Voltage (AC) | 380–480 V AC, 3-phase (400 V class) |
| Supply Voltage (DC) | 283–340 V DC (DC input) |
| Communication | RS-422 / RS-485 |
| Control Method | Sinusoidal PWM / current control |
| Control Modes | Speed, torque, position (per configuration) |
| Safety | STO (Safe Torque Off) standard |
| Cooling | Forced ventilation |
| Protection | Overcurrent, overvoltage, undervoltage, etc. |
| Compatible Motors | Mitsubishi HK series servo motors, 22 kW class (verify per application) |
| Country of Origin | Japan |
| Condition | Used / tested — inspected before dispatch |
Note: MR-J4-22KA4-RJ variants use RJ45 connectors; please confirm your exact model code, connector type and motor compatibility before ordering.
Typical Applications
- Heavy-duty machine tools and CNC axes
- High-power packaging, converting and printing machinery
- Large robotics and handling systems
- Winders, presses and test stands
- MELSERVO J4 system maintenance, repair and retrofit
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