# SI9433DY-T1-E3-VB

**VBsemi Elec** · MOSFETs · SO-8

SI9433DY-T1-E3-VB from VBsemi Elec, in a SO-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, tied to pins 2 and 3; drain-source voltage rated -20 V. |
| 2 | S | passive | Source of the P-channel MOSFET, tied to pins 1 and 3; continuous source-drain diode current is -6 A at TC = 25 °C. |
| 3 | S | passive | Source of the P-channel MOSFET, tied to pins 1 and 2; pulsed drain current is limited to -50 A. |
| 4 | G | input | Gate of the P-channel MOSFET; gate-source voltage is limited to ±12 V and the threshold is -0.5 V to -1.2 V at ID = -250 µA. |
| 5 | D | passive | Drain of the P-channel MOSFET, tied to pins 6, 7 and 8; RDS(on) is 0.015 Ω at VGS = -4.5 V. |
| 6 | D | passive | Drain of the P-channel MOSFET, tied to pins 5, 7 and 8; drain-source voltage rated -20 V. |
| 7 | D | passive | Drain of the P-channel MOSFET, tied to pins 5, 6 and 8; continuous drain current is -13 A at TC = 25 °C. |
| 8 | D | passive | Drain of the P-channel MOSFET, tied to pins 5, 6 and 7; RDS(on) is 0.021 Ω at VGS = -2.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | VBsemi Elec |
| Package | SO-8 |
| Category | Transistors/Thyristors |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `SI9433DY-T1-E3-VB`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `si9433dy-t1-e3-vb-etched.step` / `si9433dy-t1-e3-vb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si9433dy-t1-e3-vb.step` / `si9433dy-t1-e3-vb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [VBsemi Elec datasheet](docs/si9433dy-t1-e3-vb-datasheet.pdf) (9 pp, sha256 `75231a918ac43389`, retrieved 2026-10-27, 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/si9433dy-t1-e3-vb-datasheet.pdf)