Cisco QSFP-100G-SM-SR 100G CWDM4 Lite QSFP Transceiver, 2km over SMF, 10-60C 5 1

Worked first try

Installed in a Nexus 93180YC-EX and it linked up right away. No weird compatibility drama, temps stayed normal, and the LC connection felt solid. Been running a few weeks now without drops.

5