Can anyone confirm that MS310x may be replaced by MS345x connectors? for example, MS3106 → MS3456?
Hello nick4,
Welcome to the DigiKey TechForum.
We do not carry either of the MS3106 or MS3456 connectors, so we are unable to verify if one would be a cross to the other.
You should contact a vendor, that carries these connectors, to get help with this.
There’s some ambiguity of intent regarding the “may be replaced by…” concept.
The wikipedia page and other sources on MIL-DTL-5015 connectors show that the distinction between the series I and III flavors in question involves the nature of the contacts and their assembly; solder vs crimp and front vs rear release.
While completed assemblies of comparable parts from the two series may inter-mate, the practicalities of assembly differ substantially. The degree to which a person is concerned with the latter would affect the answer to the “may be replaced by” question.