The JST 02SUR-36L is a 2-position IDC receptacle in the SUR series, terminated to 36 AWG discrete wire. The closed-end yellow housing blocks moisture and flux from wicking up the wire, which matters when the connector lives inside a sealed enclosure or near a washdown zone. It mates with the matching SUR header (same pitch, same series) to form a wire-to-board interconnect.
IDC termination on 36 AWG — the fine-wire reality
The 02SUR-36L is specced for discrete 36 AWG wire. The tin-plated female socket contacts pierce the insulation on insertion — no stripping, no crimping.
The closest functional sibling is the 02SUR-32S — same 2-position, same 0.80mm pitch, same closed-end IDC design, but specced for 32 AWG instead of 36 AWG. The 02SUR-36L is the finer-wire variant; if your harness uses 32 AWG, the 02SUR-32S is a drop-in swap on the board footprint. The 03SUR-32S and 04SUR-32S add positions at the same pitch for higher circuit counts, but the wire gauge difference (32 vs 36 AWG) is the real selection fork — pick the one that matches your conductor diameter.