The ZS4742A-Q1-H is a high-performance unidirectional TVS diode manufactured by Formosa Microsemi. Supreme Components International is an authorised distributor of Formosa Microsemi components. This diode is designed to protect sensitive electronic circuits from voltage transients induced by lightning, ESD, and inductive load switching. With a power dissipation rating of 400W, the ZS4742A-Q1-H effectively clamps transient voltages to safe levels, preventing damage to downstream components. Its DO-214AC (SMA) package allows for easy surface mounting and efficient heat dissipation. This TVS diode is suitable for a wide range of applications, including automotive electronics, industrial equipment, and consumer electronics, where reliable transient voltage protection is critical. The unidirectional configuration provides optimal protection for DC circuits.