component
MMBT8550D
Public Made by Adomby adom
ST Semtech Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMMBT8550D
ST Semtech · Bipolar (BJT) · SOT-23
MMBT8550D from ST Semtech, 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 | input | Base of the PNP transistor; -VEBO max 6 V and -V(BR)EBO min 6 V at -IE = 100 µA. |
| 2 | EMITTER | passive | Emitter of the PNP transistor; emitter-base voltage limited to 6 V. |
| 3 | COLLECTOR | passive | Collector of the PNP transistor; -VCBO 40 V, -VCEO 25 V, -IC max 600 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBT8550D - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbt8550d-etched.step/mmbt8550d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbt8550d.step/mmbt8550d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST Semtech datasheet (2 pp, sha256
90002028bd6819bb, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).