# MMBT4401_R1_00001

**PANJIT International** · Bipolar (BJT) · SOT-23

MMBT4401_R1_00001 from PANJIT International, 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 | B | input | Base of the NPN transistor, shown on the lower-left lead in the top view; VEBO max 6 V and VCBO max 60 V. |
| 2 | E | passive | Emitter of the NPN transistor, shown on the lower-right lead (arrow) in the top view; VEBO max 6 V. |
| 3 | C | passive | Collector of the NPN transistor, shown on the single top lead in the top view; VCEO 40 V, VCBO 60 V, IC continuous 600 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PANJIT International |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `MMBT4401_R1_00001`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbt4401-r1-00001-etched.step` / `mmbt4401-r1-00001-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt4401-r1-00001.step` / `mmbt4401-r1-00001.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [PANJIT International datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586191503169900544) (6 pp, sha256 `2d4617124119f881`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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-r1-00001-datasheet.pdf)