Transient voltage diode, bidirectional tvs diode, TVS Zener diode
LC Series 18 V 1800 W SMT Low Capacitance TVS for High Speed Interface – SOIC-8 Website URL: https://www.futureelectronics.com/p/electromechanical–circuit-protection–tvs-diodes/lc03-3-3-tbt-semtech-6146773