Quick Takeaways
- Mitsubishi Electric listed a new August 2026 sales and service bulletin for contactors and motor starters.
- The bulletin covers a color change of locking hooks for instantaneous stop/restart relays.
- The target product shown in Mitsubishi Electric's listing is UA-DL2.
- Buyers should confirm identification, replacement-part handling and panel documentation before mixing older and newer stock.
Industry Update
Mitsubishi Electric's Factory Automation update page added a technical bulletin dated August 21, 2026, under contactors and motor starters. The listed document, YAMA0558, is titled "Notice regarding color change of Locking Hooks for Instantaneous Stop/Restart Relays."
The document listing categorizes the update as a specification change and identifies UA-DL2 as the target product. Mitsubishi Electric's download page also shows the bulletin as published in August 2026.
For motor control panels, a change like this is most relevant when technicians inspect relay accessories, compare installed components with spare stock, or approve incoming parts after a supplier shipment. The source listing does not state a change in relay performance, ratings, certifications or application limits.
Buyer Considerations
Panel builders and maintenance teams should update internal part photos, inspection notes and receiving checks so that a changed hook color is not mistaken for a wrong item. This is especially useful for facilities that keep both older and newer spare parts for motor starter panels.
Procurement teams should ask distributors to reference the Mitsubishi Electric bulletin when supplying UA-DL2 related parts. That helps reduce unnecessary returns or hold points when the physical appearance differs from earlier inventory.
Engineers should still verify the full relay model, accessory compatibility and control-panel documentation before approving substitutions. A color change can simplify identification, but it does not replace normal checks for electrical ratings, enclosure fit, wiring layout and maintenance procedures.
Frequently Asked Questions
What changed in the Mitsubishi Electric update?
Mitsubishi Electric posted an August 2026 bulletin about a color change of locking hooks for instantaneous stop/restart relays.
Which product is listed as the target?
The Mitsubishi Electric download listing identifies UA-DL2 as the target product for bulletin YAMA0558.
Does the listing claim a performance change?
No. The accessible listing identifies a specification change related to hook color and does not state a change in relay performance, ratings or certifications.
What should motor panel buyers check?
Buyers should verify relay model numbers, accessory compatibility, spare-part labeling and panel maintenance records when receiving or installing affected parts.
Source
This article summarizes publicly available source information. Confirm technical details, pricing and compliance requirements with the original source before making purchasing decisions.
Source date: 2026-08-24