# SI9433BDY

**TECH PUBLIC** · MOSFETs · SOP-8

SI9433BDY from TECH PUBLIC, in a SOP-8. 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 | S | passive | Source of the P-channel MOSFET; source-drain body diode continuous current max -1.5A at TA=25°C. |
| 2 | S | passive | Source of the P-channel MOSFET; source-drain body diode continuous current max -1.5A at TA=25°C. |
| 3 | S | passive | Source of the P-channel MOSFET; source-drain body diode continuous current max -1.5A at TA=25°C. |
| 4 | G | input | Gate of the P-channel MOSFET; gate-source voltage max ±12V, threshold -0.4V min to -1.0V max. |
| 5 | D | passive | Drain of the P-channel MOSFET; drain-source voltage max -20V, continuous drain current -7.5A at TA=25°C. |
| 6 | D | passive | Drain of the P-channel MOSFET; drain-source voltage max -20V, continuous drain current -7.5A at TA=25°C. |
| 7 | D | passive | Drain of the P-channel MOSFET; drain-source voltage max -20V, continuous drain current -7.5A at TA=25°C. |
| 8 | D | passive | Drain of the P-channel MOSFET; drain-source voltage max -20V, continuous drain current -7.5A at TA=25°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOP-8 |
| Category | Transistors/Thyristors |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `SI9433BDY`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `si9433bdy-etched.step` / `si9433bdy-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si9433bdy.step` / `si9433bdy.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603087766050271232) (3 pp, sha256 `e665e1d01d295bd4`, retrieved 2026-10-18, 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/si9433bdy-datasheet.pdf)