Mitsubishi MR-J4-350B Servo Amplifier

Series#: Mitsubishi

Product Details

MITSUBISHI MR-J4-350B – High-performance 3.5kW servo amplifier from the MELSERVO-J4 Series, designed for precision motion control in demanding industrial automation applications.
Advanced sine-wave PWM control with current control method ensures smooth, efficient motor operation and minimal torque ripple.
Built-in dynamic brake for safe, rapid deceleration and enhanced system protection during emergency stops.
Compatible with SSCNET III/H high-speed synchronous communication network for real-time multi-axis synchronization.
Supports fully closed-loop control and scale measurement for ultra-precise positioning with external encoders.
Integrated functional safety with STO (Safe Torque Off) per IEC/EN 61800-5-2, ensuring operator and equipment safety.
100% Genuine and New, rigorously inspected before international dispatch.

Specification

The MITSUBISHI MR-J4-350B is a robust 3.5kW servo amplifier from the renowned MELSERVO-J4 Series, engineered to deliver exceptional dynamic performance and reliability in high-speed, high-precision automation systems. This AC servo drive operates with a 3-phase 170 V AC output and accepts a 3-phase 200 V AC to 240 V AC input at 50/60 Hz, making it suitable for a wide range of industrial environments. With a rated current of 17A at the main circuit, it provides ample power for medium-to-large servo motors. The amplifier features a built-in dynamic brake, supports SSCNET III/H communication cycles as low as 0.222 ms, and includes comprehensive protective functions such as overcurrent shut-off, regenerative overvoltage protection, and overload shut-off. It is fully compatible with fully closed-loop control and load-side encoder interfaces via Mitsubishi Electric high-speed serial communication, ensuring precise feedback and control. The MR-J4-350B is an ideal choice for applications requiring high torque, fast response, and reliable operation, such as machine tools, packaging equipment, and robotics.

Parameter	Specification (MR-J4-350B)
Output Rated Voltage	3-phase 170 V AC
Rated Current [A] (Main Circuit)	17
Input Voltage / Frequency (AC)	3-phase 200 V AC to 240 V AC, 50 Hz/60 Hz
Input Voltage (DC)	283 V DC to 340 V DC
Permissible Voltage Fluctuation (AC)	3-phase 170 V AC to 264 V AC
Permissible Voltage Fluctuation (DC)	241 V DC to 374 V DC
Permissible Frequency Fluctuation	Within ±5%
Power Supply Capacity [kVA]	Refer to section 10.2 of manual
Inrush Current [A] (Main Circuit)	Refer to section 10.5 of manual
Control Circuit Power Supply Input (AC)	1-phase 200 V AC to 240 V AC, 50 Hz/60 Hz
Control Circuit Power Supply Input (DC)	283 V DC to 340 V DC
Control Circuit Rated Current [A]	0.2
Control Circuit Power Consumption [W]	30
Control Circuit Inrush Current [A]	Refer to section 10.5 of manual
Control Circuit Voltage	24 V DC ± 10%
Control Circuit Current Capacity [A]	0.3 (including CN8 connector signals, Note 1)
Control Method	Sine-wave PWM control, current control method
Dynamic Brake	Built-in
SSCNET III/H Communication Cycle	0.222 ms, 0.444 ms, 0.888 ms (Note 8)
Fully Closed Loop Control	Compatible (Note 7)
Scale Measurement Function	Compatible (Note 10)
Load-Side Encoder Interface	Mitsubishi Electric high-speed serial communication (Note 5)
Communication Function	USB: connection to PC via MR Configurator2
Encoder Output Pulses	Compatible (A/B/Z-phase pulse)
Analog Monitor	Two channels
Protective Functions	Overcurrent shut-off, regenerative overvoltage shut-off, overload shut-off (electronic thermal), servo motor overheat protection, encoder error protection, regenerative error protection, undervoltage protection, instantaneous power failure protection, overspeed protection, error excessive protection, magnetic pole detection protection, linear servo control fault protection
Functional Safety	STO (IEC/EN 61800-5-2)