The SMF160CA with 259V 178V 160V SOD-123FL TVS ROHS is a transient voltage suppression diode manufactured by Jingdao. It is designed to protect sensitive electronics from voltage spikes, electrostatic discharge, lightning, and other transient overvoltage events. The SOD-123FL package is designed for surface-mount applications, and the device is RoHS compliant, meaning it does not contain hazardous materials that are harmful to the environment. The device's maximum breakdown voltage is 259V, clamp voltage is 178V, and its reverse stand-off voltage is 160V.