BTB12-600BW3G is a type III bi-directional transient voltage suppressor (TVS) diode module manufactured by Littelfuse. It is designed to protect data lines, such as Ethernet and USB ports, from high voltage spikes generated by internal and external events such as electrostatic discharge (ESD) and surges. It features a 3.6V breakdown voltage, 600W peak pulse power dissipation, and 100V clamping voltage. The device is UL Recognized, RoHS compliant, and halogen-free.