# SI9435BDY-TP

**TECH PUBLIC** · MOSFETs · SOP-8

SI9435BDY-TP 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; Vds is -30V max and continuous drain current is -7A. |
| 2 | S | passive | Source of the P-channel MOSFET, connected to the other source pins 1 and 3. |
| 3 | S | passive | Source of the P-channel MOSFET, connected to the other source pins 1 and 2. |
| 4 | G | input | Gate of the P-channel MOSFET; Vgs is ±20V max, threshold -1.0V min to -2.5V max. |
| 5 | D | passive | Drain of the P-channel MOSFET, connected to drain pins 6, 7 and 8; pulsed drain current is -40A max. |
| 6 | D | passive | Drain of the P-channel MOSFET, connected to the other drain pins 5, 7 and 8. |
| 7 | D | passive | Drain of the P-channel MOSFET, connected to the other drain pins 5, 6 and 8. |
| 8 | D | passive | Drain of the P-channel MOSFET, connected to the other drain pins 5, 6 and 7. |

## Key specifications

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

## 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 | VDS | -30 |  |  | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID | -7 |  |  | A |  | 1 |
| Pulsed Drain Current | IDM | -40 |  |  | A | Repetitive rating: pulse width limited by maximum junction temperature (note 1) | 1 |
| Maximum Power Dissipation | PD |  |  | 5 | W |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance, Junction to Ambient | RθJA |  | 50 |  | ℃/W | t≤10s; mounted on 1 inch square PCB (FR4 material) (note 2) | 1 |

## CAD (KiCad official)

- Symbol: `SI9435BDY-TP`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `si9435bdy-tp-etched.step` / `si9435bdy-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si9435bdy-tp.step` / `si9435bdy-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/si9435bdy-tp-datasheet.pdf) (4 pp, sha256 `2ae551a5935b9092`, retrieved 2026-10-18, 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/si9435bdy-tp-datasheet.pdf)