# 8550M-D

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

8550M-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 PNP transistor; the datasheet rates base current IB at -0.5 A maximum and emitter-base voltage VEBO at -6.0 V. |
| 2 | Emitter | passive | Emitter terminal of the PNP transistor; emitter-base breakdown voltage VEBO is -6.0 V minimum at IE = -0.1 mA. |
| 3 | Collector | passive | Collector terminal of the PNP transistor; the datasheet rates collector-emitter voltage VCEO at -25 V and collector current IC at -1.5 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Foshan Blue Rocket Elec |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| 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 |
|---|---|---|---|---|---|---|---|
| Collector to Base Voltage | VCBO |  |  | -40 | V |  | 2 |
| Collector to Emitter Voltage | VCEO |  |  | -25 | V |  | 2 |
| Emitter to Base Voltage | VEBO |  |  | -6 | V |  | 2 |
| Collector Current | IC |  |  | -1.5 | A |  | 2 |
| Base Current | IB |  |  | -0.5 | A |  | 2 |
| Collector Power Dissipation | PC |  |  | 300 | mW |  | 2 |
| Junction Temperature | Tj |  |  | 150 | ℃ |  | 2 |
| Storage Temperature Range | Tstg | -55 |  | 150 | ℃ |  | 2 |
| Collector to Base Breakdown Voltage | VCBO | -40 |  |  | V | IC=-0.1mA IE=0 | 2 |
| Collector to Emitter Breakdown Voltage | VCEO | -25 |  |  | V | IC=-2.0mA IB=0 | 2 |
| Emitter to Base Breakdown Voltage | VEBO | -6 |  |  | V | IE=-0.1mA IC=0 | 2 |
| Collector Cut-Off Current | ICBO |  |  | -0.1 | μA | VCB=-35V IE=0 | 2 |
| Emitter Cut-Off Current | IEBO |  |  | -0.1 | μA | VEB=-6.0V IC=0 | 2 |
| DC Current Gain hFE(2) | hFE(2) | 40 |  |  |  | VCE=-1.0V IC=-800mA | 2 |
| DC Current Gain hFE(3) | hFE(3) | 45 |  |  |  | VCE=-1.0V IC=-5.0mA | 2 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  | -0.28 | -0.5 | V | IC=-800mA IB=-80mA | 2 |
| Base-Emitter Saturation Voltage | VBE(sat) |  | -0.98 | -1.2 | V | IC=-800mA IB=-80mA | 2 |
| Base-Emitter Voltage | VBE |  | -0.66 | -1 | V | VCE=-1.0V IC=-10mA | 2 |
| Transition Frequency | fT | 100 | 200 |  | MHz | VCE=-10V IC=-50mA | 2 |
| Collector Output Capacitance | Cob |  |  | 15 | pF | VCB=-10V IE=0 f=1.0MHz | 2 |

## CAD (KiCad official)

- Symbol: `8550M-D`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `8550m-d-etched.step` / `8550m-d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `8550m-d.step` / `8550m-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/8586200633661116416) (6 pp, sha256 `da6e603e24224851`, 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/8550m-d-datasheet.pdf)