B5819W

B5819W is a Schottky barrier diode from CJ (Jiangsu Changjing) in SOD-123, verified against the Changjing B5817W-5819W datasheet, which prints package marking SL for this code. Verified figures are Changjing’s own row: repetitive peak reverse voltage of 40 V, average forward current of 1 A, non-repetitive surge current of 9 A, forward voltage of 0.6 V maximum at 1 A and reverse current of 1 mA maximum. One figure needs care: the 9 A surge rating is this maker’s number — same-named B5819W sheets from other makers print a higher surge figure, and that figure does not apply to this code. Selection advice: qualify a substitute against the 9 A surge and the 0.6 V forward ceiling of this row, not against the highest numbers circulating under the B5819W name. Parameters verified against the Changjing B5819W datasheet.