Board footprint and ribbon match
The 5-104071-4: The 1.27 mm pitch and 20 positions on a single row set the board footprint — this is the AMPMODU System 50 series, designed for dense signal routing where every tenth of an inch matters. The 0.050" pitch matches standard 0.050" ribbon cable, so you can terminate this header directly to a ribbon with an IDC receptacle — watch pin-one every press.
Retention and environment
ROHS3 compliant. No official second-source or cross-reference from TE — the pitch and circuit count are specific to the AMPMODU System 50 series.