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If you run Yaskawa SGDM or SGDH servopacks, you have probably already noticed that Yaskawa’s own documentation no longer treats this generation as current. That is not a rumor — it is a documented, phased wind-down, and it changes how you should plan maintenance for these drives.
This article explains what “end of factory support” actually means for SGDM/SGDH in practice, what Yaskawa has published about the Sigma family’s discontinued status, and the three realistic paths open to a plant still running this generation.
What SGDM and SGDH actually are
SGDM and SGDH are digital servopack (servo amplifier) families from Yaskawa’s Sigma-II generation, used together with Yaskawa SGMG, SGMP, SGMS and related servo motors across machine tools, injection moulding, packaging, and general factory automation. The wider Sigma-II family — SGDM, SGDH, SGDP, and SGDJ — has been discontinued by Yaskawa, whose published direction for new installations is the current Sigma-7 platform.
What “end of factory support” means, specifically
Yaskawa Singapore’s own discontinued-products notice documents the phased end of support across the Sigma family. It lists the Sigma-III SGDS as discontinued in 2015, with factory repair service for that unit ending on 20 March 2025. That single, dated fact is the clearest evidence available that Yaskawa’s own factory support for older Sigma generations is not open-ended — it has a published end date, generation by generation.
For a maintenance team, this means three things in plain terms:
- New-unit purchase from Yaskawa for SGDM/SGDH is no longer possible — the platform is discontinued.
- Factory repair service through Yaskawa itself has a documented wind-down pattern across the Sigma family, generation by generation.
- Yaskawa’s own recommended path for anyone starting fresh is the Sigma-7 series, not a Sigma-II successor.
None of this means an SGDM/SGDH unit currently running will fail tomorrow. It means the safety net you’d normally rely on — “just send it back to Yaskawa” — is not guaranteed to exist for this generation, and the plant should plan accordingly rather than discover the gap during an unplanned stop.
Why Indian plants are still seeing real repair demand for this generation
Despite the discontinued status, repair demand for Yaskawa SGDM/SGDH drives from plants in India is real and ongoing — these units were built into machines that are still running, and replacing the machine is rarely the first option a maintenance team reaches for. That is the practical reality this article is written for: a large installed base that outlived the platform’s factory support window.
Three realistic paths for an SGDM/SGDH drive today
1. Repair and keep the architecture as-is
Repair keeps your wiring, tuning, and motor pairing exactly as built — no requalification. This is the lowest-risk route when the fault is in a repairable area (power stage, capacitors, connectors, feedback interface) and you are not ready for a migration project.
2. Source a replacement unit of the same model
An exact-model replacement avoids any re-engineering, but availability depends entirely on what exists in the surplus and specialist-stockist market for a discontinued platform — nobody can honestly promise a date for a part that may not currently exist anywhere. The realistic move is to start that search before the drive is actually down.
3. Migrate to Sigma-7
Yaskawa’s own published migration direction is Sigma-7. Moving from Sigma-II to Sigma-7 is a genuine engineering project — wiring, tuning, and in some cases motor pairing all need review — so it is a guided replacement evaluation, not a drop-in swap.
SGDM / SGDH — direct answers
Is my SGDM or SGDH still supported by Yaskawa?
The Sigma-II family is discontinued. Yaskawa’s published direction is its Sigma-7 series, and factory service for earlier Sigma generations has a documented end date (Yaskawa Singapore’s notice records the Sigma-III SGDS factory repair service ending 20 March 2025).
Should I repair or migrate my SGDM/SGDH drive?
Repair first if the machine is otherwise healthy and the fault is in a repairable area — it keeps the architecture unchanged. Migration to Sigma-7 becomes the better route when no verified same-model replacement exists, the drive fails repeatedly, or the machine is already scheduled for a control upgrade.
Can I still buy a new SGDM or SGDH?
No — the platform is discontinued at the factory level. Available units come from the surplus/specialist market, and availability is never guaranteed for a discontinued model.
Running an Allen-Bradley SLC 500 instead?
See our Allen-Bradley SLC 500 (1747) sourcing & replacement support — the same repair-vs-source-vs-replace logic applies to that platform.
What to send us
For a repair evaluation, exact-model sourcing check, or a Sigma-7 migration review, send the full drive nameplate (model, serial, rated voltage/current) and the motor it’s paired with to Ask Star. If you’d rather check first, our Yaskawa SGDM/SGDH repair & sourcing support page has the current service scope.