The housing is sealed, so it can be specified for locations exposed to moisture, splash, or washdown, such as door harnesses or engine-bay junction boxes.
Pitch, Sealing, and the Contacts-Not-Included Trap
The 1.80 mm pitch drives the board-side footprint — the mating header must match this pitch exactly, and the PCB layout must accommodate the tighter trace routing that comes with it. The sealed feature means this housing includes a perimeter seal or gasket that keeps water and dust out of the mated interface; it is not just a weather-resistant shell. The single most common procurement mistake on this part is ordering the housing alone and assuming contacts are included — the spec explicitly states Contacts Not Included. The housing is black PA66 glass-filled nylon, which handles underhood temperatures and vibration without cracking.
There is no official replacement or cross-reference on record; the 0349672005 is the standard 2-position sealed Mini50 receptacle housing, and any alternative would be a different series with a different pitch or sealing level.