# LDP01-35AY

**STMicroelectronics** · ESD And Surge Protection (TVS/ESD) · D2PAK

LDP01-35AY from STMicroelectronics, in a D2PAK. 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 | A | passive | Anode lead of the unidirectional TVS; both anode leads must be connected together. |
| 2 | K | passive | Cathode, which is the exposed metal tab (the middle lead position has no lead); stand-off voltage VRM is 30 V and breakdown voltage VBR is 33.3 V min to 36.9 V max at 1 mA for LDP01-35AY. |
| 3 | A | passive | Anode lead of the unidirectional TVS; both anode leads must be connected together. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | D2PAK |
| Category | Circuit Protection |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `LDP01-35AY`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: D2PAK (KiCad packages3D, STEP)
- 3D model files: `ldp01-35ay-etched.step` / `ldp01-35ay-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ldp01-35ay.step` / `ldp01-35ay.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/ldp01-35ay.pdf) (11 pp, sha256 `7c700397afe02388`, retrieved 2026-10-12, tier: manufacturer)
- **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/ldp01-35ay-datasheet.pdf)