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Evidence-backed decisions for obsolete industrial parts

Mitsubishi Electric · MELSERVO-J2S · Servo drive · MR-J2S 1.0kW servo amplifier

Mitsubishi Electric MR-J2S-100A

Discontinued

Analysis reviewed: September 11, 2026

What should replace this part?

The verified replacement is MR-J4-100A + HG-SR102 motor + kit SC-J2SJ4KT1K. This is a migration, not a drop-in swap.

Replace with the J4 kit including the motor — never the amplifier alone

Your options

MR-J4-100A + HG-SR102 motor kit (SC-J2SJ4KT1K)
The renewal mapping pairs amplifier MR-J4-100A with motor HG-SR102 in kit SC-J2SJ4KT1K. Conversion cables SC-SAJ3PW2KC1M-S2 and SC-HAJ3ENM3C1M apply — and per the renewal table, the existing encoder cable is reusable.
Repair or source used
The manufacturer repair window closed in August 2022. No third-party repair or used channel is confirmed for this exact model — check with the nameplate data.

What will need to change?

HardwareBoth the amplifier and the motor change (HC-SFS102 to HG-SR102). Check mounting dimensions against the renewal kit.
WiringPower, encoder, and brake conversion cables come with the kit. Connector shape, pinout, and location differ, so check them before installation.
CommunicationsSSCNET gives way to SSCNET III/H. B-type axes need a conversion unit.
SoftwareMove the setup from MR Configurator to MR Configurator2, following its parameter conversion rules.

For anything not listed here, check the replacement manual against your existing configuration.

Need help confirming this replacement?

Send us the part number and current setup for MR-J2S-100A. We'll help determine whether you need a replacement, repair, original-stock sourcing, or a migration.

Request a replacement review

Can I still buy the original?

Repair — Not confirmed for this exact modelUsed — Not confirmed for this exact modelRefurbished — Not confirmed for this exact model

We did not verify current new-original stock for this exact part.

Lifecycle

Status: Discontinued

Discontinuation date: 2015-08 (repair to 2022-08)

Lifecycle source · us.mitsubishielectric.com

Technical evidence

The recommendation above is based on the sources listed here. OEM source means the manufacturer published it; third-party source means a distributor, repair company or reseller states it. Confidence reflects how directly those sources support the recommendation: High — directly supported by manufacturer documentation. Medium — supported by family-level, secondary, or otherwise less-direct evidence. Low — limited or indirect evidence; verify independently before ordering.

OEM / manufacturer sources

OEM source Confidence: High Mitsubishi Electric System & Service (OEM-affiliated renewal guide)
The renewal table pairs the MR-J2S-100A with HC-SFS102(B) motor to the MR-J4-100A in kit SC-J2SJ4KT1K with HG-SR102(B) motor.
Source excerpt“MR-J2S-100A / HC-SFS102(B) / MR-J4-100A / SC-J2SJ4KT1K / HG-SR102(B)”
View source · Note: Renewal combination table, page 8. The row reads across amplifier, motor, amplifier, kit, and motor columns.
OEM source Confidence: Medium Mitsubishi Electric System & Service (OEM-affiliated renewal guide)
The cable rows assign conversion cables SC-SAJ3PW2KC1M-S2 and SC-HAJ3ENM3C1M, with the existing encoder cable reusable for this motor class.
Source excerpt“SC-SAJ3PW2KC1M-S2, SC-HAJ3ENM3C1M, Existing cable can be used (per motor class)”
View source · Note: The cable-to-kit assignment follows the table layout. Confirm against the kit document before ordering.
OEM source Confidence: Medium Mitsubishi Electric
The J2S series ran from 1999 to its 2015 discontinuation, with repair through August 2022.
Source excerpt“Lifecycle: Introduced (1999) - Discontinued (2015) / Repair Service available until August 2022.”
View source · Note: Series-level dates covering the 100A. The exact-variant date is unconfirmed.

Limitation: Cable assignments follow the kit table, so confirm against the kit document before ordering. The lifecycle dates are series-level.

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