# SP20P18T1

**Siliup** · MOSFETs · SOT-23-3L

SP20P18T1 from Siliup, in a SOT-23-3L. 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 limited to ±10 V absolute maximum, threshold VGS(th) -0.4 to -1.1 V at ID=-250µA. |
| 2 | S | passive | Source of the P-channel MOSFET; body diode runs from drain to source with forward voltage max -1.2 V at IS=-1A. |
| 3 | D | passive | Drain; drain-source voltage rated -20 V, continuous drain current -7 A, pulsed -28 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Siliup |
| Package | SOT-23-3L |
| 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 Voltage | VDSS |  |  | -20 | V |  | 2 |
| Gate-Source Voltage | VGSS | -10 |  | 10 | V |  | 2 |
| Continuous Drain Current | ID |  |  | -7 | A |  | 2 |
| Pulse Drain Current Tested | IDM |  |  | -28 | A |  | 2 |
| Power Dissipation | PD |  |  | 1.3 | W |  | 2 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 2 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | °C |  | 2 |
| Thermal Resistance Junction-to-Ambient | RθJA |  |  | 96 | °C/W |  | 2 |
| Drain-Source Breakdown Voltage | BVDSS | -20 |  |  | V | VGS=0V, ID=-250µA | 2 |
| Drain-Source Leakage Current | IDSS |  |  | -1 | uA | VDS=-16V, VGS=0V | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±10V, VDS=0V | 2 |
| Gate Threshold Voltage | VGS(th) | -0.4 | -0.7 | -1.1 | V | VDS=VGS, ID=-250µA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 18 | 26 | mΩ | VGS=-4.5V, ID=-5A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 28 | 36 | mΩ | VGS=-2.5V, ID=-4A | 2 |
| Diode Forward Voltage | VSD |  |  | -1.2 | V | VGS=0V, IS=-1A, TJ=25℃ | 2 |

## CAD (KiCad official)

- Symbol: `SP20P18T1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `sp20p18t1-etched.step` / `sp20p18t1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sp20p18t1.step` / `sp20p18t1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Siliup datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604428608740487168) (5 pp, sha256 `72b8ce903520b32f`, retrieved 2026-10-19, 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/sp20p18t1-datasheet.pdf)