SMBJ11A-Q is a unidirectional transient voltage suppressor diode designed for surge and ESD protection applications in compact DO-214AA (SMB) surface mount package. It features a working peak reverse voltage (VRWM) of 11V with a breakdown voltage range of 11.1V to 12.3V, providing fast response times of less than 1.0 picosecond from 0V to breakdown voltage. The device is rated for 600W peak power dissipation and includes a maximum clamping voltage of 17.0V at 9.0A, with a maximum peak clamping pulse voltage of 176.5V at 176.5A. SMBJ11A-Q is RoHS compliant and AEC-Q101 automotive grade qualified, making it suitable for protection of power buses, I/O interfaces, and overvoltage transient protection in telecom, computer, industrial, and consumer electronics applications.