MSThe P6SMB120A is a Transient Voltage Suppressor (TVS) manufactured by Formosa MS. It is designed to protect sensitive electronic components from electrical transients, such as those caused by electrical induction, electrostatic discharge, voltage surges, and lightning strikes. It is formed in the surface-mount SMB (DO-214AA) case and is RoHS compliant. It has a bi-directional maximum peak pulse power of 600 watts and a breakdown voltage of 12 Volts. Other features include low breakover and clamping voltage, fast response time, low reverse leakage current, and low capacitance.