# ESD3Z12CA

**YFW** · Electrostatic And Surge Protection (TVS/ESD) · SOD-323

ESD3Z12CA from YFW, in a SOD-323. 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 | Cathode | passive | Cathode terminal of the bidirectional ESD protection diode, rated for 12.0 V reverse stand-off voltage and 350 W peak pulse power at tp=8/20 us. |
| 2 | Anode | passive | Anode terminal of the bidirectional ESD protection diode, rated for 12.0 V reverse stand-off voltage and 350 W peak pulse power at tp=8/20 us. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SOD-323 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse Breakdown Voltage | VBR | 13.3 |  | 15.5 | V | IT=1mA | 1 |
| Reverse Leakage Current | IR |  |  | 1 | uA | VRWM=12V,Ta=25℃ | 1 |
| Reverse Stand-Off Voltage | VDRM |  |  | 12 | V |  | 1 |
| Clamping Voltage | VC |  | 24 |  | V | IPP=15A,tp=8/20us | 1 |
| Junction Capacitance | Cj |  | 100 |  | pF | VR=0V,f=1HMz | 1 |
| Peak Pulse Power | PPPM |  |  | 350 | W | tp=8/20us | 1 |
| Peak Pulse Current | IPP |  |  | 15 | A | tp=8/20us | 1 |
| Operating Junction Temperature | TJ | -55 |  | 150 | °C |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `ESD3Z12CA`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `esd3z12ca-etched.step` / `esd3z12ca-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd3z12ca.step` / `esd3z12ca.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](docs/esd3z12ca-datasheet.pdf) (3 pp, sha256 `75226e650e9baf8c`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/esd3z12ca-datasheet.pdf)