Mitsubishi MR-J4-70A Servo Amplifier

Series#: Mitsubishi

Product Details

MITSUBISHI MELSERVO-J4 SERIES SERVO AMPLIFIER 700W MR-J4-70A – Precision motion control for high-performance automation.
Rated for 3-phase 170 V AC input, delivering 5.8 A rated current for 700W servo motors.
Built-in dynamic brake for safe, rapid deceleration and emergency stops.
Fully closed-loop control compatible with Mitsubishi high-speed serial communication encoders.
Integrated USB and RS-422/RS-485 communication for easy configuration and multi-axis networking.
Compact design with sine-wave PWM control for smooth, low-noise operation.
100% Original product. We provide efficient, traceable, and secure global shipping solutions.

Specification

Engineered for demanding industrial applications, the MITSUBISHI MELSERVO-J4 SERIES SERVO AMPLIFIER 700W MR-J4-70A sets the standard for reliability and precision. This servo amplifier leverages advanced sine-wave PWM control to deliver exceptional torque and speed regulation, making it ideal for CNC machinery, robotics, and packaging systems. With a robust power stage rated for 3-phase 170 V AC and a current capacity of 5.8 A, the MR-J4-70A ensures consistent performance under varying loads. Its built-in dynamic brake enhances safety, while full closed-loop control compatibility allows for high-accuracy positioning via external encoders. The amplifier supports USB and RS-422/RS-485 communication, enabling seamless integration with MR Configurator2 for tuning and diagnostics. Whether for new installations or retrofits, this unit offers a perfect balance of power, flexibility, and durability.

Parameter	Specification
Model	MR-J4-70A
Rated Voltage (AC Input)	3-phase 170 V AC
Rated Current (AC Input)	5.8 A
Voltage/Frequency (AC Input)	3-phase or 1-phase 200 V AC to 240 V AC, 50/60 Hz (for applicable models)
Voltage (DC Input)	283 V DC to 340 V DC
Rated Current (DC Input, Note 11)	3.8 A
Permissible Voltage Fluctuation (AC Input)	3-phase or 1-phase 170 V AC to 264 V AC
Permissible Voltage Fluctuation (DC Input)	241 V DC to 374 V DC
Permissible Frequency Fluctuation	Within ±5%
Power Supply Capacity	Refer to section 10.2
Inrush Current	Refer to section 10.5
Interface Power Supply Voltage	24 V DC ± 10%
Interface Current Capacity	0.5 A (including CN8 connector signals, Note 1)
Control Method	Sine-wave PWM control, current control method
Dynamic Brake	Built-in
Fully Closed Loop Control	Compatible (Note 9)
Load-Side Encoder Interface	Mitsubishi Electric high-speed serial communication
Communication Function	USB (MR Configurator2-compatible); RS-422/RS-485 (1:n, up to 32 axes, Note 7, 13)
Encoder Output Pulses	Compatible (A/B/Z-phase pulse)
Analog Monitor	Two channels