# BSS138BKW-TP

**MCC Micro Commercial Components** · MOSFETs · SOT-323

BSS138BKW-TP from MCC Micro Commercial Components, in a SOT-323. 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 | GATE | input | Gate terminal of the N-channel MOSFET; gate-source voltage is rated ±20 V per the datasheet maximum ratings. |
| 2 | SOURCE | passive | Source terminal of the N-channel MOSFET, the reference for the gate-source (±20 V) and drain-source (50 V) ratings. |
| 3 | DRAIN | passive | Drain terminal of the N-channel MOSFET; drain-source voltage is rated 50 V, with continuous drain current of 0.37 A and pulsed drain current of 1.48 A listed in the ratings table. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC Micro Commercial Components |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BSS138BKW-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bss138bkw-tp-etched.step` / `bss138bkw-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bss138bkw-tp.step` / `bss138bkw-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MCC Micro Commercial Components datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603215939291144192) (5 pp, sha256 `362fc5c9453c604a`, 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/bss138bkw-tp-datasheet.pdf)