# HDFLT28A7

**HXY MOSFET** · ESD And Surge Protection (TVS/ESD) · SOD-123FL

HDFLT28A7 from HXY MOSFET, in a SOD-123FL. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | SOD-123FL |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse stand-off voltage (unidirectional) | VRWM |  |  | 28 | V | HDFLT28A7 (unidirectional) row, as printed in the electrical characteristics table | 1 |
| Breakdown voltage | VBR | 31.1 |  | 34.4 | V | @IT = 1 mA | 1 |
| Maximum clamping voltage | VC |  |  | 45.4 | V | @IPP = 4.4 A | 1 |
| Peak pulse current | IPP |  |  | 4.4 | A | 10/1000us waveform, as printed in electrical characteristics table | 1 |
| Reverse leakage current | IR |  |  | 1 | μA | @VRWM | 1 |
| Peak pulse power dissipation | PPPM |  |  | 4.4 | W | 10/1000μs waveform (Note1, Note2, Fig.1) | 1 |
| Steady state power dissipation | PM(AV) |  |  | 1 | W | TA=50℃ (Fig.5) | 1 |
| Peak forward surge current | IFSM |  |  | 30 | A | 8.3ms single half sine-wave superimposed on rated load, JEDEC Method (Note3, Fig.6) | 1 |
| Operating junction and storage temperature range | TJ,TSTG | -65 |  | 150 | °C |  | 1 |
| Thermal resistance junction to lead | RθJL |  | 38 |  | °C/W | Typical | 1 |
| Thermal resistance junction to ambient | RθJA |  | 180 |  | °C/W | Typical; mounted on 5.0mm×5.0mm copper pads to each terminal (Note 2) | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | 2. Mounted on 5.0mm×5.0mm (0.03mm thick) copper pads to each terminal. | 1 |

## CAD (KiCad official)

- Symbol: `HDFLT28A7`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `hdflt28a7-etched.step` / `hdflt28a7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hdflt28a7.step` / `hdflt28a7.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/8604438637371142144) (4 pp, sha256 `d9b7951872a74c5c`, retrieved 2026-10-16, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/hdflt28a7-datasheet.pdf)