CMPESD24CA Bi-Directional ESD Protection Diode Central Semiconductor CMPESD24CA Dual, Bi-Directional ESD Protection Diode is a low capacitance, dual, bi-directional ESD protection diode. This device is designed to protect two data lines against ESD damage. CMPESD24CA features a low leakage current and 20kV ESD protection. In addition to data line protection, this device is also ideal for user interface protection and charging/power port protection.