MR-J4-350A4-RJ
The Mitsubishi MR-J4-350A4-RJ is a compact servo amplifier in the Mitsubishi MELSERVO J4 Series, rated at 3.5KW, 480V, and 7.9A. This unit combines precision motion control with industrial networking, delivering repeatable performance for machinery and automation systems requiring synchronized multi-axis operation.
Mitsubishi MR-J4-350A4-RJ repair, refurbishment, and new-replacement options are available with a 2-year warranty on repairs. The MELSERVO J4 Series integrates Ethernet and CANopen connectivity, absolute encoder feedback, and advanced diagnostics for seamless integration into factory automation environments. Contact us for a quote or technical consultation.
Repair option: send in your faulty unit for component-level repair — $1,090.00 with free diagnostics, a 2-year warranty, and a 5–30 business day turnaround. Repair typically costs 40–70% of a new unit, saving you 30–60%. Learn more about our servo drive repair service.
Technical Specifications
| Part Number: | MR-J4-350A4-RJ |
| Manufacturer: | Mitsubishi |
| Voltage: | 480V |
| Current: | 7.9A |
| Power: | 3.5KW |
| Type: | MELSERVO J4 Series |
| Control Modes: | Position, velocity, torque |
| Communication: | General-purpose interface: pulse train position command, analog speed/torque command |
| Feedback: | Absolute multi-turn encoder |
| Safety: | Safe Torque Off (STO) and SS1 as standard - EN ISO 13849-1 cat. 3 PL d, IEC 61508 SIL 2 |
| Enclosure: | IP67 |
| Software: | MR Configurator 2 |
Compatible alternatives
Equivalent units from other manufacturers — all in-stock at Flexa, covered by the same 2-year warranty.
