The SMBJ440A with 713V 492V 440V SMB(DO-214AA) TVS ROHS manufactured by LGE is an unidirectional surface mount transient voltage suppressor. It is a Surface mounted technology (SMT), also known as a component package that is placed directly onto the surface of a PCB (Printed Circuit Board) for added protection from sudden, four-time voltages, such as electrostatic discharge (ESD) and transient voltage spikes. This ROHS SMBJ440A is constructed from a plastic material, and it has a storage temperature of -55C to +150C, with a peak reflow temperature of 260C. Furthermore, this device has a Breakdown Voltage: of 713V Maximum, Clamping Voltage of 492V Maximum, and a Working Voltage of 440V Maximum. This component is manufactured by LGE, a largest mobile phone company headquartered in South Korea.