# MMBTSC3875Y

**PJSEMI** · Bipolar (BJT) · SOT-23

MMBTSC3875Y from PJSEMI, 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 rates the emitter-base voltage VEBO at 5 V maximum and the collector current IC at 150 mA maximum. |
| 2 | Emitter | passive | Emitter terminal of the NPN transistor; the emitter-base breakdown voltage V(BR)EBO is at least 5 V at IE = 100 µA. |
| 3 | Collector | passive | Collector terminal of the NPN transistor; the datasheet rates VCBO at 60 V, VCEO at 50 V, and IC at 150 mA maximum. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `MMBTSC3875Y`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbtsc3875y-etched.step` / `mmbtsc3875y-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbtsc3875y.step` / `mmbtsc3875y.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PJSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884480911794176) (4 pp, sha256 `2aac360818a97ee6`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/mmbtsc3875y-datasheet.pdf)