What the Mitsubishi MR-J3-700T-ED Delivers on the Factory Floor
The Mitsubishi MR-J3-700T-ED is a 7kW AC servo amplifier from the MELSERVO MR-J3 product line. It accepts a three-phase AC200-230V/50, 60Hz main circuit input and delivers a rated current of 37A at a three-phase AC200V output.
From a maintenance engineer's view, this amplifier is built around serviceability. The control circuit takes single-phase AC200-230V/50, 60Hz, so the logic side stays powered independently of the main circuit. That separation simplifies diagnosis when a drive fault appears on a multi-axis cell.
Key Specifications of This unit Servo Amplifier
- Manufacturer: Mitsubishi
- Product Line: MELSERVO MR-J3
- Type: AC Servo Amplifier
- Command Interface: CC-Link / RS-422
- Voltage Class: 200V
- Capacity: 7kW
- Output Rated Voltage: Three-phase AC200V
- Rated Current: 37A
- Main Circuit Power Input: Three-phase AC200-230V/50, 60Hz
- Allowable Voltage Fluctuation: Within ±5%
- Control Circuit Power Input: Single-phase AC200-230V/50, 60Hz
- Power Consumption: 45W
- Control Method: Sine wave PWM control/current control method
- Dynamic Brake: Built-in
- Ambient Temperature: 0 to 55°C (no freezing)
The ±5% allowable voltage fluctuation on the main circuit input is a useful tolerance during brownout conditions. Because the amplifier holds regulation within that window, nuisance trips drop and production uptime improves. The built-in dynamic brake also shortens controlled stops, which reduces mechanical wear on the driven axis.
How Does This unit Handle Input Voltage and Output Current?
The main circuit requires three-phase AC200-230V at 50 or 60Hz. Rated current is 37A at a three-phase AC200V output. Control power is single-phase AC200-230V/50, 60Hz, and the amplifier draws 45W. Voltage fluctuation is tolerated within ±5%.
During commissioning, verify phase rotation and terminal torque before applying main power. Because the control circuit is fed separately, you can confirm logic status before the main contactor closes. This staged check is standard practice for engineering-grade precision during first-run validation.
Integration and Service Notes for Maintenance Teams
This unit supports CC-Link and RS-422 command interfaces. When wiring into a CC-Link network, confirm cable type and termination with the supplier. Integration may require an external gateway or connection module depending on the host controller.
For routine service, inspect the heatsink and fan path at planned shutdowns. Ambient temperature must stay between 0 and 55°C with no freezing. Because the dynamic brake is built in, brake resistor selection is not part of this unit's external wiring scope. Keep the cabinet filter clean to preserve airflow across the 7kW power stage.
Contact AutoDCSTech with your exact requirements for precise matching.
Availability & Condition at AutoDCSTech
| Part Number | MR-J3-700T-ED |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Japan |
