BAV Series Diodes Vishay Semiconductors BAV Series Diodes are high voltage small signal switching diodes for general-purpose applications. The silicon epitaxial planar diodes are AEC-Q101 qualified. The Vishay Semiconductors BAV Series includes BAV17, BAV18, BAV19, BAV20, and BAV21. The devices are available in a DO-35 (DO-204AH) package.