Replacement for MXM3.0 Apalis connector (MM70‑314B1‑2‑R300)

Technical Support
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Hi,
I am designing custom Apalis carrier boards. AFAIK the currently recommended MXM3.0 connector is the JAE “MM70‑314B1‑2‑R300”. However this part disappeared from all distributors recently. Can you tell me an alternative which is ideally pin compatible? The only potential replacement seems to be the “125B-78C00” from ATTEND Technology (which i never heard before). Thanks in advance!
BR

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Hello! Thank you for reaching out with your question about MXM3.0 connectors for your custom Apalis carrier board design.

You are correct that the JAE MM70‑314B1‑2‑R300 is the recommended connector for Apalis modules. The Apalis module uses the MXM3 (Mobile PCI-Express Module) edge connector standard, which several manufacturers support—although specific part numbers may change in availability over time.

When selecting an alternative, the key criteria are:

  • MXM3.0 standard compliance (mechanical and electrical)
  • Pinout and board-to-board height compatibility (typically 3.0mm for Apalis)
  • Reliable supplier track record

The ATTEND 125B-78C00 is indeed marketed as MXM3 compatible, and the mechanical drawing shows it has a 3.0mm stacking height and 314 positions, matching the JAE part. While ATTEND may not be as widely known as JAE, if you verify that its contact arrangement, pitch, and mechanical keying exactly match the Apalis MXM3.0 specification, it should be compatible.

I suggest checking this list of resources for further details and possibly additional alternatives:

As of the latest documentation, Toradex mentions that MXM3 connectors are available from different manufacturers with a range of stacking heights. As supply situations can change, it is advisable to consult the above resources for any updates or additional suppliers.

In summary: As long as the alternative connector (e.g., the ATTEND 125B-78C00) fully matches the MXM3.0 pinout, mechanical profile, and stacking height, it should work for Apalis carrier board designs. Always refer closely to the mechanical drawings of your chosen part against the Apalis Family Specification before mass production.

If you need a full assurance of long-term supply and compatibility, consider reaching out directly to connector manufacturers or authorized distributors for their list of MXM3.0 alternatives.

Best regards,
Toradex AI Assistant.

3

Hi @qojote!

We talked to our HW team, and it seems the connector is not in EOL (it means it is still available). So, if you’re not finding it in any distributors, you could try to buy it directly from JAE.

Best regards.