# RCLAMP3521P

**TECH PUBLIC** · Electrostatic And Surge Protection (TVS/ESD) · DFN1006-2

RCLAMP3521P from TECH PUBLIC, in a DFN1006-2. 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 | 1 | passive | Terminal 1 of the bi-directional TVS diode, shown on the pin configuration diagram; the device has a reverse working voltage of 3.3 V max and ESD immunity of ±20 kV per IEC 61000-4-2 (contact and air). |
| 2 | 2 | passive | Terminal 2 of the bi-directional TVS diode, shown on the pin configuration diagram; the device has a reverse working voltage of 3.3 V max and ESD immunity of ±20 kV per IEC 61000-4-2 (contact and air). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | DFN1006-2 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `RCLAMP3521P`
- Footprint: `Diode_SMD:D_SOD-882`
- 3D model: DFN1006-2 (KiCad packages3D, STEP)
- 3D model files: `rclamp3521p-etched.step` / `rclamp3521p-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rclamp3521p.step` / `rclamp3521p.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/rclamp3521p-datasheet.pdf) (4 pp, sha256 `dfc917d2e48b6ea5`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/rclamp3521p-datasheet.pdf)