H3V3LD5B

H3V3LD5B is a low-capacitance ESD protection diode from Zhuhai HongJiaCheng in SOD-523, package marking 3C, verified word-for-word against the maker’s datasheet for this code. Verified figures: a maximum reverse standoff of 3.3 V, breakdown between 3.5 V and 6.5 V at 1 mA, clamping of 6 V maximum at 1 A and 12 V maximum at 8 A, junction capacitance of 12.5 pF typical and 25 pF maximum, and an IEC 61000-4-2 rating of ±25 kV air discharge and ±20 kV contact discharge. The selection point is the pairing of a 3.3 V standoff with double-digit-picofarad capacitance in the tiny SOD-523 body — protection for a 3.3 V data or control pin that cannot carry the far larger capacitance of a power-line TVS. Selection advice: read the clamp at the current your threat model assumes — 6 V at 1 A and 12 V at 8 A are both this code’s figures, and the downstream pin’s absolute maximum has to clear the one that matches the surge. Note on attribution: the candidate pool labelled this line R+O (HongJiaCheng); the figures here are HongJiaCheng’s own datasheet values. Parameters verified against the HongJiaCheng H3V3LD5B datasheet.