# BSS138W-TP

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

BSS138W-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 of the N-channel MOSFET, with a maximum gate-source voltage of ±20 V and a threshold of 0.8 V min to 1.50 V max at ID=1 mA. |
| 2 | SOURCE | passive | Source of the N-channel MOSFET, with a body diode to drain and a maximum continuous drain current of 0.22 A. |
| 3 | DRAIN | passive | Drain of the N-channel MOSFET, with a maximum drain-source voltage of 50 V and a maximum RDS(on) of 3.5 ohm at VGS=10 V, ID=0.22 A. |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Drain-Source Voltage | VDS |  |  | 50 | V |  | 1 |
| Gate-Source Voltage | VGS |  |  | 20 | V |  | 1 |
| Drain Current-Continuous | ID |  |  | 0.22 | A |  | 1 |
| Operating Junction Temperature | TJ | -55 |  | 150 | °C |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | °C |  | 1 |
| Thermal Resistance Junction to Ambient | RthJA |  | 417 |  | °C/W | Junction to Ambient | 1 |

## CAD (KiCad official)

- Symbol: `BSS138W-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bss138w-tp-etched.step` / `bss138w-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bss138w-tp.step` / `bss138w-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MCC(Micro Commercial Components) datasheet](docs/bss138w-tp-datasheet.pdf) (4 pp, sha256 `0192590a496a4523`, retrieved 2026-10-22, tier: lcsc)
- **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/bss138w-tp-datasheet.pdf)