MR-J2S-70A MELSERVO-J2S 750W AC Servo Amplifier | Mitsubishi Electric

The Original New Mitsubishi Electric MR-J2S-70A is a 750 W (0.75 kW) general-purpose AC servo amplifier from the MELSERVO-J2-Super series, designed for high-precision motion control in industrial automation systems. It features sine-wave PWM control with current control method, supporting both speed control mode and torque control mode. The amplifier includes a built-in dynamic brake and uses natural cooling for reliable operation. With a 550 Hz speed frequency response and 17-bit encoder feedback input (131,072 ppr), it delivers responsive and accurate motor control for machine tool feed axes, packaging machinery, and general industrial automation. This product has been discontinued by Mitsubishi Electric and is available as a spare part for maintaining existing MELSERVO-J2S installations.

Core Engineering Highlights:
750 W (0.75 kW) rated output | 200–230 V AC single-phase or three-phase input | Sine-wave PWM control / current control method | Speed control mode + torque control mode | Built-in dynamic brake | Natural cooling (fanless) | 17-bit encoder feedback input (131,072 ppr) | 0°C to +55°C ambient operation | H168 × W70 × D190 mm

Key Features:

• Original New Mitsubishi Electric MR-J2S-70A amplifier

• 750 W rated active power for general-purpose motion control

• 200–230 V AC input, compatible with single-phase (2P) or three-phase (3P) supply

• Sine-wave PWM control with current control method

• Supports speed control mode and torque control mode

• Built-in dynamic brake for controlled deceleration

• Natural cooling (fanless) for reduced maintenance

• 17-bit encoder feedback input (131,072 ppr)

• 550 Hz speed frequency response

• 8 digital inputs (24 V DC, sink/source): EMG, LSP, LSN, SON, RES, PC/ST1/RS2, TL/ST2/RS1, SP2

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

• 2 analog inputs: 0–10 V DC (TLA/TC), -10 to +10 V DC (VC/VLA)

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

Applications:

• Machine tool feed axes and precision positioning

• Packaging machinery servo axes

• Conveyor positioning and material handling systems

• General industrial automation and OEM equipment

• Applications requiring speed or torque control with dynamic braking

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi Electric MELSERVO-J2-Super series architecture. Drive model and firmware compatibility should be verified before installation.

• Verified compatible servo motors include: HC-KFS73, HC-KFS46, HC-KFS410, HC-MFS73, HC-UFS72, HC-UFS73

• Also compatible with HG-KN43J-S100 and HG-KN43BJ-S100 motors (per third-party supplier data)

• For new installations, the recommended replacement is the MR-J4-70A servo amplifier (MELSERVO-J4 series)

Related Products:

• MR-J4-70A – Recommended replacement servo amplifier (MELSERVO-J4 series)

• HC-KFS73 – 750 W low-inertia servo motor, 17-bit encoder

• HC-MFS73 – 750 W medium-inertia servo motor, 17-bit encoder

• MR-BAT6V1SET – Battery for absolute encoder

• MR-J3ENCBL2M-A1-L – Encoder cable, 2 m (standard bending life)

• MR-PWS1CBL2M-A1 – Power cable, 2 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.