The DT16T10I-B with ITO-220 TRIACs ROHS is a RoHS (Restrictions of Hazards Substances) compliant electronic switching component manufactured by Doeshare. It is a triac, which is a three terminal electronic component that allows current to flow through it in either direction when triggered. This particular model is housed in an ITO-220 package, meaning it has three metal leads for connection. The size of the component also allows for larger current flow, making it suitable for a variety of applications. This model of triac is useful for devices and applications which require the control of AC (alternating current) power in both directions.