Part Number - MR-J4-20A

MR-J4-20A is

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Product Details

  • Melservo MR-J4 Servo Amplifier 200W (MRJ420A)
  • Manufacturer: Mitsubishi
  • Series: MELSERVO MR-J4

Product Description

The Mitsubishi MR-J4-20A (MRJ420A) is a Melservo MR-J4 series servo amplifier with an output of 200W. The servo amplifier has a rated output current of 1.5 Amp. The main circuit power supply has 3-phase or 1-phase, whose voltage is 200 to 240VAC and a frequency is 50/60Hz. The control circuit power supply has a 1-phase voltage of 200 to 240VAC with a frequency of 50/60Hz. The allowable voltage oscillation is the same for both power supplies except that the main circuit also has a 3-phase.

The MR-J4-20A servo amplifier can connect with a variety of external objects. The CN1 port can attach to a signal connector, especially those that are from the FX series and Q-series. To connect with a motor, the amplifier must connect its CN2 port and encoder cable to the motor’s encoder. Then a motor power cable connects to the ‘U, V, W’ terminal. The MR-J4-20A servo amplifier may also append itself to a PC with a MR Configurator 2 by connecting the CN5 port to a MR-J3USBCBL3M cable. There is the CN3 port that connects by a RS-422 communication to GOT series Mitsubishi touchscreens. The CN8 port may concatenate with a signal connector, particularly the MR-J3-D05 and they can link by using the MR-D05UDL3M-B STO cable.

The MR-J4-20A servo amplifier can connect with five felicitous motors. The HG-KR23 and the HG-MR23 are the applicable rotary motor; the LM-U2PAB-05M-0SS0 and the LM-U2PBB-07M-1SS0 are the applicable linear servo motors; and the TM-RFM002C20 is the applicable direct drive motor. These servo motors may be implemented as described from above.

Here is the manual referenced:

Technical Specifications

Part Number: MR-J4-20A (MRJ420A)
Module Type: Servo Amplifier
Voltage/Frequency: 200 to 240VAC, 3- or 1-phase 50/60Hz
Output Wattage: 200W
Weight: 1.76lbs (0.8kg)

Related Parts

HC-MFS73BK - Mitsubishi Melservo HC Servo Motor with Brake Key
HC-UFS72K - Mitsubishi Melservo HC Servo Motor with KEY
HC-UFS73 - Mitsubishi Melservo HC Servo Motor

Shipping and Order Information

  • TRW Supply can usually ship in stock items same day before 3:30 PM EST for no extra cost and before 5 PM with a rush fee
  • Mitsubishi MELSERVO MR-J4 Shipping options vary by location. Call for an accurate quote.


  • The Mitsubishi MR-J4-20A comes with a two year warranty.
  • A three year warranty is available. Please inquire for pricing.

Additional Information

TRW Electric & Supply Company is a global automation supplier. We deliver reliable new and refurbished parts at a great value. Our product focus is Omron and Mitsubishi products, but we have been able to provide our customers with solutions from other manufacturers as well. Our goal is to supply the automation industry with the best service and pricing, and of course conduct business with a high level of integrity.

Authorized Distributors

A Mitsubishi Authorized Distributor for MELSERVO-MR-J4 is not the only source for Mitsubishi products. Many of the Mitsubishi products have been discontinued and therefore are no longer available from authorized suppliers. TRW Electric & Supply has many new and refurbished Mitsubishi MELSERVO-MR-J4 parts available for purchase.

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