The SMAJ43A manufactured by LGE is a two-way, three-terminal, unidirectional, surface-mounted, transient voltage-suppression (TVS) diode. It is designed to protect components against damage from transients in the electronic control circuits of consumer applications. It is RoHS-compliant (Restriction of Hazardous Substances) and has an absolute maximum peak reverse voltage rating of 69.4V, a peak pulse current rating of 47.8V and a breakdown voltage rating of 43V. It is typically used in power supplies, telecommunication systems, electronic components, circuit boards and military applications.