MR-J2S-350A MELSERVO-J2S 3.5kW AC Servo Amplifier | Mitsubishi Electric

The Original New Mitsubishi Electric MR-J2S-350A is a 3.5 kW general-purpose AC servo amplifier from the MELSERVO-J2S series, designed for high-power motion control in industrial automation systems. It operates on a 3-phase 200–230 V AC supply and features sine-wave PWM control with built-in dynamic brake and forced ventilation cooling. Supporting both position and speed control modes, this amplifier delivers reliable torque performance for demanding applications such as CNC machinery, robotics, and heavy-duty material handling. The MR-J2S-350A is compatible with 17-bit absolute/incremental encoder feedback (131,072 ppr) and is intended for maintenance and spare part support of existing MELSERVO-J2S installations.

Core Engineering Highlights:
3.5 kW (3500 W) rated output power | 3-phase 200–230 V AC input | Sine-wave PWM control / current control method | Built-in dynamic brake | Forced ventilation cooling | 17-bit encoder feedback input (131,072 ppr) | 0°C to +55°C ambient operation | H168 × W90 × D195 mm | 2.27 kg

Key Features:

• Original New Mitsubishi Electric MR-J2S-350A amplifier

• 3.5 kW rated active power for high-power motion control applications

• 3-phase 200–230 V AC input (200 V class)

• Sine-wave PWM control with current control method

• Speed control mode and torque control mode supported

• Built-in dynamic brake for controlled deceleration

• Forced ventilation cooling for thermal management under load

• 17-bit encoder feedback input (131,072 ppr) for precise position detection

• 8 digital inputs (24 V DC, sink/source) for control signals including EMG, LSP, LSN, SON, RES

• 3 relay-contact digital outputs (ALM, ZSP, TLC/VLC)

• 2 analog inputs (0–10 V DC, ±10 V DC) for speed and torque commands

• Comprehensive protection functions: overcurrent, regeneration overvoltage, overload (electronic thermal), servo motor overheat, encoder fault, undervoltage, overspeed, excessive error

Applications:

• CNC machine tools and precision machining

• Robotics and automated assembly lines

• Heavy-duty material handling and conveyor systems

• Packaging machinery and industrial automation

• Large-scale positioning and motion control applications

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi Electric MELSERVO-J2S series architecture. Drive model and firmware compatibility should be verified before installation.

• Verified compatible servo motors include: HC-SFS352, HC-RFS203, and other HC-SFS / HC-LFS series motors with 17-bit encoder feedback

• For new installations, the recommended replacement is the MR-J4-350A servo amplifier (MELSERVO-J4 series)

Related Products:

• MR-J4-350A – Recommended replacement servo amplifier (MELSERVO-J4 series)

• HC-SFS352 – 3.5 kW servo motor, medium inertia

• HC-RFS203 – 2.0 kW servo motor, low inertia

• MR-BAT6V1SET – Battery for absolute encoder

• MR-J3ENCBL5M-A1-L – Encoder cable, 5 m (standard bending life)

• MR-PWS1CBL5M-A1 – Power cable, 5 m

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi Electric and MELSERVO are trademarks of Mitsubishi Electric Corporation.