All 18 positions are loaded, meaning the BOM line count must match exactly; there's no depopulation option to fudge a mismatch.
The 5A per-contact rating at the stated operating temperature is typical for signal-level interconnect — this header isn't sized for a power bus, but it handles logic-level loads.
No official cross-reference or successor is on record, so stick with this exact order code for the BOM line.