EquipVector
Evidence-backed decisions for obsolete industrial parts

Mitsubishi Electric · MELSERVO-J2S · Servo drive · MR-J2S 0.75kW servo amplifier (flat-type motor class)

Mitsubishi Electric MR-J2S-70A

Discontinued

Analysis reviewed: September 11, 2026

What should replace this part?

The verified replacement is MR-J4-70A + HG-UR72 motor + kit SC-J2SJ4KT1K. This is a migration, not a drop-in swap.

Replace with the J4 kit including the flat-type motor — never the amplifier alone

Your options

MR-J4-70A + HG-UR72 flat-type motor kit (SC-J2SJ4KT1K)
The renewal mapping pairs amplifier MR-J4-70A with flat-type motor HG-UR72 in kit SC-J2SJ4KT1K. Expect parameter, SSCNET, and mounting rework.
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-UFS72 flat-type to HG-UR72). Check mounting dimensions against the renewal kit.
WiringThe power, encoder, and brake connections change. Order the matching replacement cables and check the connector pinout 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-70A. 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 flat-type renewal row pairs the MR-J2S-70A with HC-UFS72(B) motor to the MR-J4-70A in kit SC-J2SJ4KT1K with HG-UR72(B) motor.
Source excerpt“MR-J2S-70A / HC-UFS72(B) / MR-J4-70A / SC-J2SJ4KT1K / HG-UR72(B)”
View source · Note: Flat-type (UFS) class, table page 8. The pairing differs from the SFS class.
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 70A. The exact-variant date is unconfirmed.

Limitation: Confirm the UFS flat-type motor class from the nameplate — the standard SFS kit does not apply. Cable assignments follow the kit table.

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