The SMF43A, manufactured by JSMSEMI, is a unidirectional, RoHS-compliant, SOD-123FL Transient Voltage Suppressor (TVS) with 2.9A, 1uA, 69.4V, 47.8V, 43V, and 52.8V ratings. It is designed to protect against short-term overvoltage transients and is suited for use in electronic circuits to provide protection from damaging voltage transients. It is typically used in automotive, industrial, telecommunications, consumer, data communications, and other applications.