Mitsubishi MR-J3-40A Servo Amplifier: Your 400W Motion Control Solution

Power your precision machines with the Mitsubishi MR-J3-40A. This reliable 400W servo drive offers smooth control and is packed with essential features. It's the smart choice for upgrading your automation system.

Top Features at a Glance

• All-in-One Design: Built-in dynamic brake and 10W regenerative resistor included.
• Saves Energy: 85% inverse efficiency reduces your power costs.
• Easy Power Connection: Compatible with both single and three-phase inputs.
• Quiet & Smooth: Sine-wave PWM control for stable, low-vibration operation.
• Saves Space: Compact and lightweight for easy panel mounting.

Detailed Product Specifications

Brand: Mitsubishi Electric

Series: MELSERVO-J3 Series

Model: MR-J3-40A

Power Rating: 400 Watts (0.4 Kilowatts)

Current Rating: 2.8 Amps

Output: 3-Phase, 170 Volts AC

Main Input Voltage: 200-230V AC, 50/60 Hz (1-Phase or 3-Phase)

Control Input Voltage: 200-230V AC, 50/60 Hz (1-Phase)

Interface Power: 24V DC

Built-in Resistor: 10 Watts

System Efficiency: 85%

Control Method: Sine-wave PWM, Current Control

Communication Port: RS-422

Safe Temperature Range: 0°C to +55°C

Product Weight: 0.79 kg

Product Size: Compact form factor

Cooling: Natural convection (no fan needed)

Frequently Asked Questions

Is the built-in regenerative resistor sufficient?

For most standard 400W applications with moderate stop/start cycles, the 10W built-in resistor is adequate. For very high-duty cycling, check your machine's regeneration energy calculation.

How do I connect the power for this unit?

You have options. Connect either a standard 230V single-phase line OR a 200-230V three-phase line to the main power terminals for maximum installation flexibility.

What maintenance does the MR-J3-40A require?

Very little. With natural cooling (no fan), there are no filters to clean or fans to replace. Just ensure the unit is kept free of excessive dust and operates within its temperature range.

Can I use this to replace an older servo drive?

Often, yes. The MR-J3-40A's general-purpose design and standard control modes (speed/torque/position) make it a common upgrade path. Verify your motor compatibility and parameter settings.

What's the first thing to check if there's a fault?

First, check the 5-digit LED display on the unit. It shows an alarm code. Common issues are wiring errors or incorrect parameter settings, which are usually quick to fix.

Order Information & Support

In the Box: 1 x MR-J3-40A Servo Amplifier.

Our Promise: Backed by a full 12-month warranty for your peace of mind.

Fast Delivery: Shipped quickly worldwide via FedEx, UPS, or DHL.

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