Frequently acts as a NPN or PNP transistor, or sometimes a specialized diode, depending on the specific manufacturer marking conventions. Marking: "GYD9E" is the top marking on the package. 2. GYD9E Key Specifications (Typical)
– Connect directly to the main input source. Engineers must route a low-ESR ceramic decoupling capacitor as close to this pin as possible to eliminate parasitic loop inductance. gyd9e datasheet