The ES5AC is a Hyperfast SMC RoHS rectifier diode manufactured by Jingdao. This diode is designed for use in switch mode power supply (SMPS) applications, and its Hyperfast feature ensures a faster, more reliable switching operation. The diode has a low forward voltage drop, low reverse leakage current, and high surge current capability, making it suitable for high power applications. It is RoHS compliant, meaning that it does not contain any hazardous materials, such as lead and cadmium, which could be unsafe and pose hazardous environmental effects.