component
KMBT3904
Public Made by Adomby adom
KEXIN 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
markdownKMBT3904
KEXIN · Bipolar (BJT) · SOT-23
KMBT3904 from KEXIN, 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 terminal of the NPN transistor; the datasheet gives VEBO 6 V (emitter-base) and VBE(sat) 0.95 V at IC=50 mA, IB=5 mA. |
| 2 | Emitter | passive | Emitter terminal of the NPN transistor; the datasheet rates emitter-base voltage VEBO at 6 V and continuous collector current IC at 0.2 A. |
| 3 | Collector | passive | Collector terminal of the NPN transistor; the datasheet rates VCBO at 60 V, VCEO at 40 V, IC continuous at 0.2 A and collector power dissipation PC at 0.2 W. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | KEXIN |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
KMBT3904 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
kmbt3904-etched.step/kmbt3904-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);kmbt3904.step/kmbt3904.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KEXIN datasheet (2 pp, sha256
9fc9ec86806f25db, 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).