# HESD9B5VDA

**HXY MOSFET** · ESD And Surge Protection (TVS/ESD) · SOD-923

HESD9B5VDA from HXY MOSFET, in a SOD-923. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1 | passive | One terminal of the bidirectional ESD protection diode, which the datasheet describes as protecting one bi-directional line where arrays are not practical; the datasheet does not state which terminal is the line and which is the reference. |
| 2 | 2 | passive | The other terminal of the bidirectional ESD protection diode, rated for IEC61000-4-2 Level 4 ESD protection with a stand-off voltage of 5 V; the datasheet does not state which terminal is the line and which is the reference. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | SOD-923 |
| Category | Circuit Protection |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power | PPP |  |  | 80 | W | tp = 8/20μs | 1 |
| Maximum lead temperature for soldering | TL |  |  | 260 | °C | during 10s | 1 |
| Storage Temperature Range | Tstg | -55 |  | 155 | °C |  | 1 |
| Maximum junction temperature | Tj |  |  | 150 | °C |  | 1 |
| IEC61000-4-2 (ESD) air discharge |  | -25 |  | 25 | KV | air discharge | 1 |
| IEC61000-4-2 (ESD) contact discharge |  | -25 |  | 25 | KV | contact discharge | 1 |
| Operating Temperature Range | Top | -40 |  | 125 | °C |  | 1 |
| Reverse leakage current | IR |  |  | 0.1 | μA | @ VRWM | 2 |
| Breakdown voltage | VBR | 5.6 |  |  | V | @ IT = 1.0 mA (Note 2: pulse test, 25°C) | 2 |
| Clamping voltage | VC |  |  | 8.5 | V | @ IPP = 5 A | 2 |
| Capacitance | C |  | 15 |  | pF |  | 2 |

## CAD (KiCad official)

- Symbol: `HESD9B5VDA`
- Footprint: `Diode_SMD:D_SOD-923`
- 3D model: SOD-923 (KiCad packages3D, STEP)
- 3D model files: `hesd9b5vda-etched.step` / `hesd9b5vda-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hesd9b5vda.step` / `hesd9b5vda.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [HXY MOSFET datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603008847854653440) (4 pp, sha256 `7202fd50ad8b4613`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/hesd9b5vda-datasheet.pdf)