This SMF120CA with 193V 133V 120V SOD-123 TVS ROHS is a transient voltage suppression (TVS) diode manufactured by AnBon. It is designed to protect sensitive electronic equipment from voltage transients induced by electric discharge, electrostatic discharge, lightning, and inductive load switching, among other causes. It features fast response times of less than 1 nanosecond, excellent clamping performance, low capacitance, and low leakage current. The device is RoHS compliant and housed in a compact, SOD-123 surface-mount package.