This is a transient voltage suppressor (TVS) diode, manufactured by Yageo, with the part number 1.5KE130A. It features a unidirectional voltage function, and has a peak surge peak reverse voltage rating of 179V, a working peak reverse voltage rating of 124V and a breakdown voltage of 111V, and comes in a DO-201 package style. It is compliant with the RoHS directive.