The SMDJ22CA-AT with TVS SMC(DO-214AB) RoHS is a unidirectional, surface-mount ESD/Transient Voltage Suppressor diode manufactured by Yageo. It is designed to protect sensitive electrical components from electrical transients. It is a fast acting device that will quickly absorb the transient overvoltages in order to protect integrated circuits from damaging overvoltage. The SMDJ22CA-AT uses an DO-214AB package, which is a small, rectangular, epoxy-sealed package designed for surface mounting. It is also RoHS compliant, meaning it meets the highest environmental standards and is free from hazardous substances.