# HESDNC7

**HXY MOSFET** · ESD And Surge Protection (TVS/ESD) · SOT-23

HESDNC7 from HXY MOSFET, in a SOT-23. 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 pair (tied with pin 2 in all electrical characteristics); clamping voltage is max 12 V at IPP = 10 A (8x20 µs) from pin 1/2 to pin 3, and junction capacitance is max 15 pF at 0 V, 1 MHz. |
| 2 | 2 | passive | The second terminal of the bidirectional ESD protection diode pair (tied with pin 1 in all electrical characteristics); clamping voltage is max 12 V at IPP = 10 A (8x20 µs) from pin 1/2 to pin 3, and junction capacitance is max 15 pF at 0 V, 1 MHz. |
| 3 | 3 | passive | Common terminal of the bidirectional protection pair, opposite pins 1 and 2; clamping voltage from pin 3 to pin 1/2 is max 20 V at IPP = 10 A (8x20 µs), and junction capacitance is max 15 pF. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## 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 |  |  | 200 | W | tp = 8/20μs | 1 |
| Maximum lead temperature for soldering | TL |  |  | 260 | °C | during 10s | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C |  | 1 |
| Operating Temperature Range | Top | -55 |  | 125 | °C |  | 1 |
| Maximum junction temperature | Tj |  |  | 150 | °C |  | 1 |
| IEC61000-4-2 ESD air discharge |  | -30 |  | 30 | KV | IEC61000-4-2 (ESD) air discharge | 1 |
| IEC61000-4-2 ESD contact discharge |  | -30 |  | 30 | KV | IEC61000-4-2 (ESD) contact discharge | 1 |
| IEC61000-4-4 EFT |  |  |  | 15 | A | IEC61000-4-4 (EFT) | 1 |
| Reverse stand-off voltage (Pin 1、2 to Pin 3) | VRWM |  |  | 7 | V | Pin 1、2 to Pin 3 | 2 |
| Reverse stand-off voltage (Pin 3 to Pin 1、2) | VRWM |  |  | 12 | V | Pin 3 to Pin 1、2 | 2 |
| Reverse breakdown voltage (Pin 1、2 to Pin 3) | VBR | 7.5 |  |  | V | IT = 1 mA, Pin 1、2 to Pin 3 | 2 |
| Reverse breakdown voltage (Pin 3 to Pin 1、2) | VBR | 13.3 |  |  | V | IT = 1 mA, Pin 3 to Pin 1、2 | 2 |
| Reverse leakage current (Pin 1、2 to Pin 3) | IR |  |  | 200 | nA | VR = VRWM, Pin 1、2 to Pin 3 | 2 |
| Reverse leakage current (Pin 3 to Pin 1、2) | IR |  |  | 100 | nA | VR = VRWM, Pin 3 to Pin 1、2 | 2 |
| Clamping voltage (Pin 1、2 to Pin 3) | VC |  |  | 12 | V | IPP = 10A (8 x 20µs pulse), Pin 1、2 to Pin 3 | 2 |
| Clamping voltage (Pin 3 to Pin 1、2) | VC |  |  | 20 | V | IPP = 10A (8 x 20µs pulse), Pin 3 to Pin 1 、2 | 2 |
| Junction capacitance (Pin 1、2 to Pin 3) | CJ |  |  | 15 | pF | VR = 0V, f = 1MHz, Pin 1、2 to Pin 3 | 2 |
| Junction capacitance (Pin 3 to Pin 1、2) | CJ |  |  | 15 | pF | VR = 0V, f = 1MHz, Pin 3 to Pin 1、2 | 2 |

## CAD (KiCad official)

- Symbol: `HESDNC7`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `hesdnc7-etched.step` / `hesdnc7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hesdnc7.step` / `hesdnc7.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/8758128555958120448) (5 pp, sha256 `2c98ae0743fbf0c1`, retrieved 2026-10-17, 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/hesdnc7-datasheet.pdf)