component
2N5551S-RTK
Public Made by Adomby adom
KEC Semicon 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
markdown2N5551S-RTK
KEC Semicon · Bipolar (BJT) · SOT-23
2N5551S-RTK from KEC Semicon, 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 | EMITTER | passive | NPN emitter terminal; the datasheet rates emitter-base voltage VEBO at 6 V maximum and emitter-base breakdown V(BR)EBO at 6 V minimum. |
| 2 | BASE | passive | NPN base terminal; base current is rated at 100 mA maximum, and VBE(sat) is at most 1.0 V at IC=50 mA, IB=5 mA. |
| 3 | COLLECTOR | passive | NPN collector terminal; ratings are VCBO 180 V, VCEO 160 V, and collector current IC 600 mA, with collector power dissipation PC 350 mW when the package is mounted on 99.5% alumina. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
2N5551S-RTK - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
2n5551s-rtk-etched.step/2n5551s-rtk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);2n5551s-rtk.step/2n5551s-rtk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEC Semicon datasheet (3 pp, sha256
39406473fae30a16, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).