Part Number - MR-J4-350A

MR-J4-350A is

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Product Details

  • Melservo MR-J4 Servo Amplifier 3.5KW 200V (MRJ4350A)
  • Manufacturer: Mitsubishi
  • Series: MELSERVO MR-J4

Product Description

The Mitsubishi MR-J4-350A (MRJ4350A) is a 200V, 3.5kW Melservo MR-J4 Servo Amplifier (MRJ4350A). The amplifier’s output voltage is 170VAC at 3-phases and a current of 17.0A. There are two circuit power supplies: a main and a control. The voltage for both power supplies ranges from 200 to 240VAC, for the main circuit it is 3-phases and for the control circuit, it is 1-phase. The MR-J4-350A’s frequency for both power supplies is 50/60Hz.

There are multifarious modules that the MR-J4-350A servo amplifier links to. There are seven rotary servo motors that the servo amplifier can attach to, especially those from the HG-SR or HG-JR series; the servo amplifier can connect to four linear servo motor and three direct drive motors from the TM-RFM series.

The MR-J4-350A servo amplifier may connect to a servo motor by an encoder cable and a servo motor power cord. The first cable can attach to the CN2 port that bond with an encoder connector. The other cord may attach to the ‘U, V, W’ connector. Below the CN2 connector is a CN4 connector that can contain a MR-BAT6V1SET battery. The MR-J4-350A servo amplifier’s small CN5 connector is a USB port that utilizes the MR-J3USBCBL3M USB cable. This cable can then connect with a personal computer that deploys a MR Configurator2. The CN1 port may connect with a Mitsubishi module such as a controller from the FX3 or Q series. A RS-422 connector is utilized to attach to a Mitsubishi GOT series touchscreen display. Lastly, the CN8 port can connect to a MR-J3-D05 logic module using a MR-D05UDL3M-B STO cable.

Here is the manual referenced:

Technical Specifications

Part Number: MR-J4-350A (MRJ4350A)
Module Type: Servo Amplifier
Voltage/Frequency: 200 to 240VAC, 3-phase 50/60Hz
Output Wattage: 3.5kW
Weight: 5.07lbs (2.3kg)

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-J4-350A 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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