The SMDJ28CA is a surface-mount transient voltage suppression (TVS) diode made by Jinkaisheng. It is RoHS compliant and is designed to provide protection from electrostatic discharge (ESD), electrical transients, surge events, and other forms of overvoltage. This device is perfect for use in laptops, cell phones, portable electronic devices, and other applications that are prone to voltage spikes. With a low capacitance of 0.9pF, it ensures that the signal quality remains unaffected. It comes with an operating voltage range of 4.5-14.5V and a breakdown voltage range of 28V-32V. Its maximum peak pulse current rating is 300A (10/1000µs), and its maximum power dissipation is 1.5W.