72 Circuits at 0.100" Pitch — Board Fit
The 3-534998-6: The 0.100" grid is a legacy standard that matches a wide installed base of headers and ribbon-cable IDC connectors — the board footprint is a straightforward 0.100" square grid, 36 per row.
Contact Plating and Current Duty
The 2A rating is a per-contact ceiling at room temperature; the actual current in a dense 72-position connector is limited by the total bundle temperature rise. For a 72-circuit fully loaded harness, derate the per-contact current to stay within the housing material limit.
Temperature Range and Housing
In high-vibration environments, additional strain relief or a secondary locking mechanism on the mating header is recommended.
The base product number 534998 identifies the receptacle family; the matching header base numbers are in the 5-534206 or 5-534237 ranges (verify the exact pin length and plating).