Mitsubishi Electric MR-J2 Series Servo Drives: MR-J2-20A1 MR-JCCBL5M-L PARTS 3000 SA 0022-15835 S00000024B-3D 1K4PP23BB000 PP23BB –

Technical Dossier

Product Details And Specifications

Mitsubishi Electric MR-J2 Series: Comprehensive Module Range and Technical Overview

The Mitsubishi Electric MR-J2 series represents one of the most widely deployed AC servo drive platforms in global heavy industry. Installed across petrochemical refineries, nuclear power auxiliary systems, automotive stamping lines, and continuous-process chemical plants, the MR-J2 platform established Mitsubishi Electric's position as a tier-one motion control supplier throughout the 1990s and 2000s. Its closed-loop analog and digital hybrid architecture, combined with a standardized encoder interface, made it the default servo solution for machine builders across Japan, Europe, and Southeast Asia. Installed base density remains high in facilities with 15–25 year equipment lifecycles, making reliable spare parts sourcing a critical operational requirement.

The Evolution of MR-J2 Architecture

The MR-J2 series succeeded the MR-J1 platform and introduced a 16-bit serial encoder interface, replacing the earlier resolver-based feedback of predecessor drives. The base MR-J2 variant supported analog speed/torque command inputs and pulse-train position commands, targeting general-purpose servo applications. The MR-J2-A sub-series added enhanced analog command resolution and expanded I/O for multi-axis coordination. The MR-J2S (Super) generation, which followed, introduced full digital SSCNET (Servo System Controller NETwork) communication, enabling synchronous multi-axis control at 0.888 ms cycle times.

Compatibility constraints are significant: MR-J2 drives use a 26-bit incremental encoder protocol incompatible with MR-J3/MR-J4 absolute encoder systems. Motor cables (e.g., MR-JCCBL5M-L) are series-specific and cannot be substituted with MR-J3 or MR-J4 cable assemblies without signal-level adaptation. Control wiring pinouts differ between MR-J2 and MR-J2S, requiring schematic verification before cross-generation substitution. For facilities migrating from MR-J2 to MR-J4, Mitsubishi Electric provides the MR-J4-DU conversion unit, though full rewiring of encoder and power connectors is required.

MR-J2 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked models within the MR-J2 and MR-J2-A product families. Each entry includes a concise functional descriptor for procurement and maintenance reference.

MR-J2-10A: 100W single-phase 200VAC analog command servo amplifier
MR-J2-20A: 200W single-phase 200VAC general-purpose servo amplifier
MR-J2-20A1: 200W single-phase 200VAC servo amplifier, enhanced I/O variant
MR-J2-40A: 400W single-phase 200VAC servo amplifier, standard torque control
MR-J2-70A: 700W single-phase/three-phase 200VAC servo amplifier
MR-J2-100A: 1kW three-phase 200VAC servo amplifier, mid-range axis drive
MR-J2-200A: 2kW three-phase 200VAC servo amplifier, high-inertia load rated
MR-J2-350A: 3.5kW three-phase 200VAC servo amplifier, heavy-duty axis
MR-J2-500A: 5kW three-phase 200VAC servo amplifier, large-frame motor compatible
MR-J2-700A: 7kW three-phase 200VAC servo amplifier, press/extruder axis
MR-J2-10B: 100W SSCNET-compatible servo amplifier (MR-J2S sub-series)
MR-J2-20B: 200W SSCNET bus-connected servo amplifier
MR-J2-70B: 700W SSCNET servo amplifier for multi-axis controllers
MR-J2-200B: 2kW SSCNET servo amplifier, synchronized motion axis
MR-JCCBL5M-L: 5-meter encoder cable assembly, low-bend-radius, MR-J2 compatible
MR-JCCBL10M-L: 10-meter encoder cable, standard flex, MR-J2/MR-J2S series
MR-BAT: Absolute position backup battery unit for MR-J2S absolute encoder retention
MR-J2-03A5: 30W micro servo amplifier, compact axis positioning
MR-RB032: Regenerative brake resistor unit, 30Ω, MR-J2 series compatible

Sourcing Hard-to-Find & Obsolete MR-J2 Series Parts

The MR-J2 series reached end-of-production status, with Mitsubishi Electric having transitioned its servo amplifier roadmap through MR-J3 and into the current MR-J4/MR-J5 generation. Factory new stock is no longer available through standard distribution channels. DriveKNMS maintains a dedicated inventory program for MR-J2 lifecycle extension, sourcing verified surplus, refurbished, and new-old-stock (NOS) units from decommissioned OEM lines and authorized liquidation channels globally.

For facilities operating MR-J2-based systems beyond their original design life, DriveKNMS provides: direct unit replacement with tested equivalents, cross-reference identification for unlabeled or damaged units, and technical consultation on MR-J2 to MR-J4 migration feasibility. All sourced units are traceable to original manufacturer documentation and are supplied with test reports on request.

Quality Control for the MR-J2 Range

MR-J2 servo amplifiers incorporate a multi-layer PCB backplane with integrated IGBT power modules, encoder signal conditioning circuits, and a dedicated DSP for current-loop control. DriveKNMS applies a structured test protocol to all MR-J2 units prior to dispatch: power-stage IGBT leakage and switching verification, encoder interface signal integrity check at 2.5MHz clock rate, analog command input linearity test across ±10V range, regenerative circuit continuity and resistor value verification, and full-load thermal cycling at rated output current for a minimum of 30 minutes. Units exhibiting capacitor ESR degradation — a common failure mode in drives exceeding 15 years of service — are recapped using equivalent-specification components before re-testing. Each unit ships with a test record identifying pass/fail criteria and measured values.