# HSM05-7

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

HSM05-7 from HXY MOSFET, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | I/O1 | passive | Protected I/O line 1. Anode of the first internal ESD steering diode; cathode is tied to pin 3. Connect in series/shunt to the data line requiring transient protection. Reverse working voltage 5.0 V, reverse breakdown 6.0 V min (IT = 1 mA), clamping voltage 9.8 V max at 1 A (8/20 µs) and 18 V max at 17 A (8/20 µs). |
| 2 | I/O2 | passive | Protected I/O line 2. Anode of the second internal ESD steering diode; cathode is tied to pin 3. Same electrical characteristics as pin 1 (VRWM = 5.0 V, VBR = 6.0 V min, VC = 9.8 V @ 1 A / 18 V @ 17 A, CJ ≈ 180 pF typ at VR = 0 V, 1 MHz). |
| 3 | COM/K | passive | Common cathode of both internal ESD diodes. Typically connected to the local power/reference rail (or GND for bidirectional-line protection) to sink ESD/EFT surge current away from the protected I/Os. Reverse leakage current 10 µA max at VRWM = 5.0 V. |

## Key specifications

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

## Ordering variants

Same part, different packaging or reel option.

- `HSM05-7`

## CAD (KiCad official)

- Symbol: `HSM05-7`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `hsm05-7-etched.step` / `hsm05-7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hsm05-7.step` / `hsm05-7.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/8603008785719828480) (None pp, sha256 `445f812871929695`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/hsm05-7-datasheet.pdf)