Mitsubishi MELSERVO MR-J4
MELSERVO MR-J4 is the right family when the project is really about servo-axis behavior, motion response, and keeping a Mitsubishi motion standard intact. It is especially relevant in service and retrofit situations where the machine has already been tuned around the MR-J4 platform and continuity matters. Use the series page before choosing the exact amplifier to check axis demand, communication expectations, feedback compatibility, and safety needs. In motion work, the wrong family choice creates more downstream friction than the wrong price point. Mitsubishi MELSERVO MR-J4 currently indexes 2 model entries in this seed. Use that list as a decision queue, not as proof that every order code is equivalent for your application.
Compare related series
Start with the Servo Drives and Amplifiers overview to compare nearby series, review the main selection factors, and narrow the shortlist before choosing a specific model.
Series Products

Mitsubishi Electric
Mitsubishi Electric MR-J4-40A
MR-J4-40A
MR-J4-40A is a Mitsubishi Electric MELSERVO-J4 single-axis servo amplifier in the 200 V class, rated at 0.4 kW with 2.8 A output for general-purpose pulse and analog command applications.
Lifecycle Status: PM280 — Active
Mitsubishi Electric
Mitsubishi Electric MR-J4-70A
MR-J4-70A
MR-J4-70A is a Mitsubishi Electric MELSERVO-J4 single-axis servo amplifier in the 200 V class, rated at 0.75 kW with 5.8 A output for general-purpose pulse and analog command applications.
Lifecycle Status: PM280 — Active