The SMBJ28A is a surface mount transient voltage suppressor (TVS) manufactured by Shikues that is fully RoHS compliant. It is a 2.8 V rated Zener diode with 600 W peak pulse power rating, and is capable of withstanding reverse voltages of up to 7.5kV. It is available in various packages and is designed to protect against electrostatic discharge (ESD) and electrical fast transients (EFT). This device is commonly used in power supply components and electronic circuit boards.