What this 4-pin breakaway header fits
The 5-146252-2: It's unshrouded, so there's no keying — the mating receptacle aligns by the board layout or visual check.
Footprint and mating half
The dual-row 0.100" pitch and 0.318" mating pin length match standard AMPMODU Mod II receptacles. Because it's unshrouded, the mating connector aligns by board layout or visual check.
