Identifying the 5.08 mm Terminal Block Plug
The 39980-0310 is a Molex NEO 5.08mm TB Plug, S98 STY09 CKT — a 5.08 mm pitch terminal block plug, not a standard pin header.

Molex 39980-0310, NEO 5.08mm TB Plug S98 STY09 CKT, a 5.08 mm pitch terminal block plug in the Header Plugs & Sockets category, active production, ROHS3 compliant.
| Parameter | Value |
|---|---|
| Series | * |
| Package | Box |
The 39980-0310 is a Molex NEO 5.08mm TB Plug, S98 STY09 CKT — a 5.08 mm pitch terminal block plug, not a standard pin header.
Yes, it is ROHS3 Compliant, meeting the latest EU RoHS directive requirements.
The description indicates a 5.08 mm pitch, which is the center-to-center spacing between adjacent circuits on the terminal block plug.