The ESD5Z12T with TVS SOD-523 RoHS is an electronic component produced by Yenji, a Japanese company. It is a transient voltage suppressor diode, and is commonly used in systems that require protection from high voltage spikes. The device works by clamping down on the voltage, reducing its level to a safe one, and dissipating any energy that goes past its rated limit. It features a small package size, contains an integrated avalanche diode, and is 100% lead-free and RoHS compliant. The ESD5Z12T is designed for automotive applications, making it well-suited for industrial and automotive use.