# MMBT5551_R1_00101

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

MMBT5551_R1_00101 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; VEBO max 6 V, and the transistor has hFE of 80 min at VCE=5V, IC=1mA. |
| 2 | E | passive | Emitter of the NPN transistor; emitter-base voltage limited to 6 V. |
| 3 | C | passive | Collector of the NPN transistor; VCEO 160 V, VCBO 180 V, IC continuous 600 mA. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `MMBT5551_R1_00101`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbt5551-r1-00101-etched.step` / `mmbt5551-r1-00101-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbt5551-r1-00101.step` / `mmbt5551-r1-00101.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/8590230894507294720) (6 pp, sha256 `2bd5c94b483cddd9`, 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/mmbt5551-r1-00101-datasheet.pdf)