The 1-178315-3: The 3.81mm pitch gives you a bit more room per circuit than the common 2.54mm grid, which helps with routing wider traces or higher-voltage clearance. The 4-wall shroud protects the gold-plated tab contacts from physical damage and guides the mating housing into alignment — a real time-saver during assembly when you're working blind behind a panel.
Board mounting and retention
The 0.150" (3.81mm) post length suits standard 1.6mm-thick boards.
