BT53W/1/B27 – FUJITSU

The FUJITSU BT53W/1/B27 is a bipolar junction transistor (BJT) likely intended for high-frequency amplification or switching applications. Based on the part number convention and manufacturer, the “BT” prefix designates a bipolar transistor, “53” suggests a specific internal design and performance characteristics, and “W” likely indicates a lead forming or packaging variant. The “/1” suffix denotes a specific electrical grade or selection within the BT53W family. The “B27” likely represents a date or lot code, or potentially a tighter hFE grouping than standard. The provided “NOT RoHS” designation indicates the component contains lead (Pb) or other restricted substances exceeding RoHS directive limits, precluding its use in applications requiring RoHS compliance. Further characterization requires access to the original FUJITSU datasheet, as parameters such as Vceo, Ic, fT, and power dissipation are not specified in the provided information.