9 circuits at 3.96 mm pitch — wire-to-board spacing, not mezzanine
The 1744489-9: The 0.156" (3.96 mm) pitch is wider than the typical 0.100" (2.54 mm) board-to-board header — this is a wire-to-board spacing, designed to accept individual crimp terminals rather than mate with another PCB. The 9 positions are fully loaded, so every pin carries circuit current. Tin plating suits moderate mating cycles (50–100) in clean, dry environments; the thickness here is above the typical 40–80 µin flash, which extends wipe life before fretting corrosion starts. Friction lock on the shroud — not a ramp latch or screw — means the mating housing snaps on with a push and holds against moderate vibration, but won't survive a pull test without the lock engaged. The single-wall shroud leaves the top of the pins exposed, which helps visual alignment during hand assembly.
Glow wire — not every Economy Power header carries it
Glow wire compliant per the evidence — this variant passes the glow-wire ignition test, a requirement for IEC 60335-1 household appliance applications. The standard Economy Power header without glow wire rating may not pass the same test. If your BOM calls out glow wire, this is the version to lock.