The SMBJ45A is a RoHS-compliant transient voltage suppressor (TVS) diode made by Semiware. It is a DO-214AA package with three breakdown voltages of 72.7V, 50V, and 45V. This diode is designed to reduce voltage transients (spikes) on electrical lines, protecting the device against voltage surges. It is used to prevent responses to external parameters or internal processes that cause overvoltage. The maximum peak pulse power of the SMBJ45A is 1500W, the maximum clamping voltage is 110V, and the maximum operating temperature is+150°C.