The 3.81 mm pitch gives enough barrier spacing for the 250 V class without crowding the panel layout, and the polarizing key stops a mis-mate when you have multiple connectors in the same harness.
It accepts male pin contacts that are crimp-terminated to the wire. The Dynamic D-3100 series uses a specific crimp terminal; the exact TE part number for the contact depends on the wire gauge you are running. For a typical 16-20 AWG power circuit, the standard pin contact is the TE 1-178802-2 (loose piece) or the reel-fed version for automated crimping. Always confirm the contact part number against your wire size and the housing's current rating before committing the BOM.
What does the operating temperature tell you?
The glass-filled thermoplastic polyester holds its dimensional stability across that span, so the terminal retention and polarizing key alignment stay true. The 105°C ceiling is the housing material limit, not the contact rating; the actual current the assembly can carry will derate above 85°C or so, depending on the contact and wire size.