Dear All,
Under IPC-A-620A Section 9.1 Hardware Mounting Jackpost height, it is stated that for defect, the jackpost face extends above the connector face or greater than 0.75mm below the connector face. For acceptable, the jackpost face is flush to 0.75mm below the face of the connector. I guess the requirement stated in this section give the best assurance of maximum connector pin contact.

If this is the requirement, I am puzzled why I am seeing jackpost with its face extended slightly beyond the connector face in those COTS modules. Because of this observation, we are seeing another alternative requirements for the DSUB connectors. This lead to debate whether in-house build modules with D-SUB connectors and jackpost should follow what is practice in those COTS modules or stick to IPC-A-620 Section 9.1.

Hope to hear some feedback from your experiences.

Thanks and regards,
~wee mei~


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