component
MMBT4401 2X
Public Made by Adomby adom
TDSEMIC Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MMBT4401 2X
TDSEMIC · Bipolar (BJT) · SOT-23
MMBT4401 2X from TDSEMIC, 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 NPN switching transistor; Vebo max 6 V, breakdown V(BR)EBO min 6 V at IE=100µA. |
| 2 | EMITTER | passive | Emitter of the NPN transistor; Vcbo 60 V and Vceo 40 V are measured with respect to it/the base. |
| 3 | COLLECTOR | passive | Collector of the NPN transistor; Vceo max 40 V, Vcbo max 60 V, Ic max 600 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TDSEMIC |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBT4401 2X - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbt4401-2x-etched.step/mmbt4401-2x-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbt4401-2x.step/mmbt4401-2x.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TDSEMIC datasheet (3 pp, sha256
87d872432d408714, retrieved 2026-10-09, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(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).
# MMBT4401 2X
**TDSEMIC** · Bipolar (BJT) · SOT-23
MMBT4401 2X from TDSEMIC, 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 NPN switching transistor; Vebo max 6 V, breakdown V(BR)EBO min 6 V at IE=100µA. |
| 2 | EMITTER | passive | Emitter of the NPN transistor; Vcbo 60 V and Vceo 40 V are measured with respect to it/the base. |
| 3 | COLLECTOR | passive | Collector of the NPN transistor; Vceo max 40 V, Vcbo max 60 V, Ic max 600 mA. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TDSEMIC |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `MMBT4401 2X`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbt4401-2x-etched.step` / `mmbt4401-2x-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt4401-2x.step` / `mmbt4401-2x.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [TDSEMIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618863227069747200) (3 pp, sha256 `87d872432d408714`, retrieved 2026-10-09, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-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).
[Datasheet PDF](docs/mmbt4401-2x-datasheet.pdf)