# SQ2303ES

**Leiditech** · MOSFETs · SOT-23

SQ2303ES from Leiditech, 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 | G | input | Gate; gate-source voltage limit is ±12 V, with RDS(ON) specified down to VGS=-2.5V. |
| 2 | S | passive | Source of the P-channel MOSFET; body diode connects source to drain. |
| 3 | D | passive | Drain; VDS max -30 V, continuous drain current -5.0 A at TC=25°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| 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 | BVDSS | -30 |  |  | V | VGS=0V ID=-250μA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | μA | VDS=-30V,VGS=0V | 2 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±12V,VDS=0V | 2 |
| Gate Threshold Voltage | VGS(th) | -0.5 | -0.9 | -1.5 | V | VDS=VGS,ID=-250μA | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 41 | 50 | mΩ | VGS=-10V, ID=-4.0A | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 50 | 65 | mΩ | VGS=-4.5V, ID=-3.5A | 2 |
| Drain-Source On-State Resistance | RDS(ON) |  | 60 | 90 | mΩ | VGS=-2.5V, ID=-2.0A | 2 |
| Diode Forward Voltage | VSD |  | 0.72 | 1.4 | V | VGS=0V,ISD=-1A | 2 |
| Drain-Source Voltage | VDS | -30 |  |  | V |  | 1 |
| Gate-Source Voltage | VGS | -12 |  | 12 | V |  | 1 |
| Drain Current-Continuous | ID | -5 |  |  | A | TC=25°C | 1 |
| Drain Current-Continuous | ID | -3.5 |  |  | A | TC=100°C | 1 |
| Drain Current-Pulsed | IDM | -20 |  |  | A |  | 1 |
| Maximum Power Dissipation | PD |  |  | 2.1 | W |  | 1 |
| Junction and Storage Temperature Range | TJ,TSTG | -55 |  | 150 | °C |  | 1 |
| Thermal Resistance junction-case | RθJc |  | 1.1 |  | °C/W |  | 1 |
| Thermal Resistance junction-to-ambient | RθJA |  | 60 |  | °C/W |  | 1 |

## CAD (KiCad official)

- Symbol: `SQ2303ES`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sq2303es-etched.step` / `sq2303es-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sq2303es.step` / `sq2303es.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Leiditech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904170972979200) (6 pp, sha256 `98c6fa6ec6c592df`, retrieved 2026-10-17, 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/sq2303es-datasheet.pdf)