# S8550M-D

**Foshan Blue Rocket Elec** · Bipolar (BJT) · SOT-23

S8550M-D from Foshan Blue Rocket Elec, 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 | Base | passive | Base terminal of the silicon PNP transistor; the absolute maximum base current is -200 mA at Ta=25℃. |
| 2 | Emitter | passive | Emitter terminal of the PNP transistor; the emitter-to-base breakdown voltage VEBO is -6.0 V minimum at IE=-0.1 mA. |
| 3 | Collector | passive | Collector terminal of the PNP transistor; the absolute maximum collector current is -800 mA and the collector-to-emitter voltage VCEO is -25 V at Ta=25℃. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Foshan Blue Rocket Elec |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `S8550M-D`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `s8550m-d-etched.step` / `s8550m-d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s8550m-d.step` / `s8550m-d.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Foshan Blue Rocket Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586200981076262912) (6 pp, sha256 `0b87e03cdc2b7ad7`, retrieved 2026-10-09, 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/s8550m-d-datasheet.pdf)