# PJM138NSA

**PJSEMI** · MOSFETs · SOT-23

PJM138NSA 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 | Gate | input | Gate terminal of the N-channel MOSFET, with gate-source voltage rated at ±20 V. |
| 2 | Source | passive | Source terminal of the N-channel MOSFET, with diode forward current rated at 0.22 A. |
| 3 | Drain | passive | Drain terminal of the N-channel MOSFET, with drain-source voltage rated at 50 V and continuous drain current at 0.22 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PJSEMI |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| 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 Breakdown Voltage | V(BR)DSS | 50 |  |  | V | VGS=0V,ID=250μA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 0.5 | μA | VDS=50V,VGS=0V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 100 | nA | VDS=30V,VGS=0V | 2 |
| Gate-Body Leakage Current | IGSS | -10 |  | 10 | μA | VGS=±20V,VDS=0V | 2 |
| Gate Threshold Voltage | VGS(th) | 0.6 | 1 | 1.4 | V | VDS=VGS,ID=250μA | 2 |
| Drain-Source On-Resistance | RDS(on) |  | 1 | 3.5 | Ω | VGS=10V,ID=0.22A | 2 |
| Drain-Source On-Resistance | RDS(on) |  | 1.1 | 6 | Ω | VGS=4.5V,ID=0.22A | 2 |
| Diode Forward Voltage | VSD |  |  | 1.4 | V | VGS=0V,IS=0.22A | 2 |
| Diode Forward Current | IS |  |  | 0.22 | A |  | 2 |
| Drain-Source Voltage | VDS |  |  | 50 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Drain Current-Continuous | ID |  |  | 0.22 | A |  | 1 |
| Maximum Power Dissipation | PD |  |  | 0.35 | W |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance, Junction-to-Ambient | RθJA |  |  | 357 | ℃/W | Surface mounted on FR4 board, t ≤ 10 sec (Note 1) | 1 |

## CAD (KiCad official)

- Symbol: `PJM138NSA`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `pjm138nsa-etched.step` / `pjm138nsa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pjm138nsa.step` / `pjm138nsa.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/8588884474335125504) (6 pp, sha256 `8aef2fe2d69d2a4b`, 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/pjm138nsa-datasheet.pdf)