EquipVector
Evidence-backed decisions for obsolete industrial parts

Mitsubishi Electric · Q series · PLC CPU · Q02 entry high-performance CPU

Mitsubishi Electric Q02CPU

Discontinued

Analysis reviewed: September 11, 2026

What should replace this part?

The verified replacement is Q03UDVCPU. This is a migration, not a drop-in swap.

Replace with Q03UDVCPU and budget the compatibility rework

Your options

Q03UDVCPU — manufacturer alternative
The alternative-model table maps the Q02CPU to the Q03UDVCPU. Programs need modification, some functions are restricted, and GX Developer projects move to GX Works2.
Repair or source used
No third-party repair or used channel is confirmed for this exact model. Check with the nameplate data.

What will need to change?

HardwareThe CPU moves from Q02CPU (entry high-performance class) to Q03UDVCPU. Check base-unit and rack compatibility.
CommunicationsRS-232 port is lost; use USB or Ethernet, or add a QJ71C24N serial module.
SoftwareGX Developer stops being supported after the swap. Move to supported versions of GX Works2, MX Component, and MX Sheet.
AccessoriesPlan on replacing GOT displays and intelligent function modules with compatible versions.

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 Q02CPU. 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: unknown (series discontinuation Dec 2016 per FA-A-0223)

Lifecycle source · mitsubishielectric.co.jp

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 (discontinuation bulletin FA-A-0223-B) · 2019-03
The discontinuation bulletin's alternative-model row maps the Q02CPU to the Q03UDVCPU — an asymmetric mapping, not the larger UDV.
Source excerpt“Model to be discontinued Q02CPU / Alternative model Q03UDVCPU”
View source · Note: The neighboring Q02HCPU has no verified target in this table, so this page does not cover it.
OEM source Confidence: Medium Mitsubishi Electric (discontinuation bulletin FA-A-0223-B) · 2019-03
The Q-series discontinuation bulletin lists the Q02CPU among the affected models, with production ending December 2016.
Source excerpt“Relevant Models incl. Q02CPU; production of MELSEC-Q models will be discontinued”
View source · Note: Establishes the lifecycle dates used on this page.

Limitation: Programs need modification and some functions are restricted — check the bulletin precautions, and don't extend this mapping to the neighboring Q02HCPU.

Related replacement analyses