The TE 3-1971775-3 is a 6-position, 2-row receptacle housing from the Power Triple Lock, Standard series, on a 6.00 mm pitch. It's a panel-mount shell that accepts crimp tab contacts — the housing itself is the wire-side interface for a sealed, latch-locked power interconnect. The blue colour and cap (cover) feature are visual and mechanical identifiers for this specific variant.
Critical Detail: Contacts Are Sold Separately
This listing is for the housing only — the crimp tab contacts are not included. The housing accepts tab-type contacts terminated to the wire via a standard crimp tool, then inserted into the cavity until the latch seats. Without the contacts, this is just an empty shell; make sure your BOM line accounts for both the housing and the per-position terminals.
The glass-filled PBT insulation holds up to the heat and resists creep under the latch load. If your application lives above 105°C ambient, you'll need a different material grade.
The cap (cover) on this housing protects the contact cavities when unmated.