The SMBJ440A is a unidirectional Transient Voltage Suppressor (TVS) diode designed for surge and electrostatic discharge (ESD) protection. It provides a working peak reverse voltage of 440V and has a minimum breakdown voltage of 492V. This device is rated for a peak pulse power dissipation of 600W and exhibits a maximum reverse leakage current of just 1.0 µA at its working voltage. Housed in a compact DO-214AA (SMB) surface-mount package, the SMBJ440A is ideal for protecting sensitive electronics in applications requiring compliance with standards like IEC 61000-4-5 for surge immunity.