# ESD5Z12T5G

**onsemi** · TVS · SOD-523

ESD5Z12T5G from onsemi, in a SOD-523. 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 of the uni-directional ESD protection diode, marked by the polarity band on the SOD-523 package. |
| 2 | Anode | passive | Anode of the uni-directional ESD protection diode, the side opposite the cathode band on the SOD-523 package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Total Power Dissipation on FR-4 Board | PD |  |  | 500 | mW | @ TA = 25°C (Note 1) | 2 |
| Junction and Storage Temperature Range | TJ, Tstg | -55 |  | 150 | °C |  | 2 |
| Lead Solder Temperature - Maximum (10 Second Duration) | TL |  |  | 260 | °C | 10 second duration | 2 |
| IEC 61000-4-2 (ESD) Contact |  | -30 |  | 30 | kV | Contact | 2 |
| IEC 61000-4-2 (ESD) Air |  | -30 |  | 30 | kV | Air | 2 |
| IEC 61000-4-4 (EFT) |  |  |  | 40 | A |  | 2 |
| ESD Voltage Per Human Body Model |  |  |  | 16 | kV | Per Human Body Model | 2 |
| ESD Voltage Per Machine Model |  |  |  | 400 | V | Per Machine Model | 2 |
| Maximum Reverse Leakage Current | IR |  |  | 0.01 | A | @ VRWM | 3 |
| Breakdown Voltage | VBR | 14.1 |  |  | V | @ IT = 1.0 mA (Note 2) | 3 |
| Clamping Voltage Max | VC |  |  | 25 | V | @ Max IPP | 3 |
| Maximum Reverse Peak Pulse Current | IPP |  |  | 9.6 | A | Surge current waveform per Figure 5 | 3 |
| Peak Power Dissipation | Ppk |  |  | 240 | W | Surge current waveform per Figure 5 | 3 |
| Forward Voltage | VF |  |  | 1.1 | V | @ IF = 10 mA for all types | 3 |
| Working Peak Reverse Voltage | VRWM |  | 12 |  | V |  | 3 |
| Clamping Voltage | VC |  | 17 |  | V | @ IPP = 5.0 A | 3 |
| Max. Capacitance | C |  | 55 |  | pF | @ VR = 0 and f = 1 MHz | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | LEAD FINISH: 100% Matte Sn (Tin) MOUNTING POSITION: Any | 1 |

## CAD (KiCad official)

- Symbol: `ESD5Z12T5G`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `esd5z12t5g-etched.step` / `esd5z12t5g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd5z12t5g.step` / `esd5z12t5g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/esd5z12t5-d.pdf) (6 pp, sha256 `56ee5fd48804e547`, retrieved 2026-10-30, tier: manufacturer)
- **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/esd5z12t5g-datasheet.pdf)