The SMBJ30CA is an electronic part manufactured by Shikues that is RoHS compliant. It is a TVS (transient voltage suppressor) diode which is designed to limit voltage transients on a circuit. It is constructed with two high temperature epoxy-encapsulated chips and a lead frame, and it is rated for 30V to protect against reverse and overvoltage transients. The SMBJ30CA has a peak pulse power rating of 600 watts, a reverse clamping voltage of 27-36V, and is designed for surface mount placement.