component
MMBT5551
Public Made by Adomby adom
hongjiacheng Bipolar (BJT), SOT-23. Datasheet-verified pinout, 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
markdownMMBT5551
hongjiacheng · Bipolar (BJT) · SOT-23
MMBT5551 from hongjiacheng, 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 | B | input | Base; control input for NPN transistor |
| 2 | E | passive | Emitter; current return path for NPN transistor |
| 3 | C | output | Collector; current output for NPN transistor with maximum 0.6 A |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBT5551 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbt5551-etched.step/mmbt5551-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbt5551.step/mmbt5551.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (3 pp, sha256
d4a70afeee466866, retrieved 2026-09-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).