The BT138-800E is a Silicon Controlled Rectifier (SCR) manufactured by NXP Semiconductors. It is a three-terminal device with an anode and two cathodes, and is designed for blocking, phase control and on/off control applications. It has a maximum current rating of 800A, a maximum power rating of 200W at a maximum forward Voltage drop of 1.6V. The SCR also has a blocking voltage of 600V, a minimum turn on voltage of 400V, and a maximum gate trigger current of 5mA. The BT138-800E is RoHS compliant, with a package amount of three, packaged in D2PAK and lead free.