4-position unshrouded header, 0.156" pitch
The 640384-4 is the 4-circuit member of TE Connectivity's MTA-156 unshrouded header line, a single-row board-to-wire interconnect rated 600 VAC with tin-plated mating contacts.
Position count within the MTA-156 series
Within the MTA-156 series the 640384-4's 4 positions sit between the 2-position and 6-position siblings — the 0.156" pitch, unshrouded profile, and through-hole termination are shared across the series, so match the position count to the circuit count required.