The 3-641215-3: The 3 circuits are all loaded — no empty positions. That pitch matches standard 0.100" ribbon cable; if you're pressing an IDC connector onto ribbon, the pitch has to match the ribbon, and this one does. The header is shrouded on one wall — the single wall guides the mating housing but leaves the other side open. That's typical for MTA-100 wire-to-board applications where the receptacle has its own alignment features.
Gold Mating Finish — 30 µinch for Repeated Mate Cycles
The solder tails are tin-plated, 150.0 µinch (3.81 µm) thick — tin wets well in wave solder and holds a reliable joint without gold embrittlement risk.
Friction Lock and UL94 V-0 Housing
The fastening type is a friction lock — a simple ramp on the header that engages a matching latch on the receptacle. It's not a secondary lock, but it prevents the connector from backing off under light vibration or cable tug.
Active Production — Orderable Now
No EOL notice or successor has been issued. The part is ROHS3 compliant and available in bulk packaging.