# ESD5452E-3

**WILLSEMI Will Semicon** · ESD And Surge Protection (TVS/ESD) · SOT-23

ESD5452E-3 from WILLSEMI Will Semicon, in a SOT-23. 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 | I/O1 | passive | Protected line 1 of the bi-directional TVS, rated for ±5V max reverse stand-off voltage and ±30kV IEC61000-4-2 contact and air discharge. |
| 2 | I/O2 | passive | Protected line 2 of the bi-directional TVS, rated for ±5V max reverse stand-off voltage and ±30kV IEC61000-4-2 contact and air discharge. |
| 3 | GND | power_in | Common ground reference for both TVS lines, which clamp to about 9V typ. at IPP = 16A (TLP). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Peak pulse power (tp = 8/20μs) | Ppk |  |  | 80 | W | tp = 8/20μs | 2 |
| Peak pulse current (tp = 8/20μs) | IPP |  |  | 8 | A | tp = 8/20μs | 2 |
| ESD according to IEC61000-4-2 air discharge | VESD | -30 |  | 30 | kV | IEC61000-4-2 air discharge | 2 |
| ESD according to IEC61000-4-2 contact discharge | VESD | -30 |  | 30 | kV | IEC61000-4-2 contact discharge | 2 |
| Operation temperature | TOP | -40 |  | 85 | oC |  | 2 |
| Storage temperature | TSTG | -55 |  | 150 | oC |  | 2 |
| Lead temperature | TL |  |  | 260 | oC |  | 2 |
| Reverse stand-off voltage | VRWM | -5 |  | 5 | V |  | 3 |
| Reverse leakage current | IR |  |  | 100 | nA | VRWM = 5V | 3 |
| Junction capacitance | CJ |  | 17.5 | 22 | pF | VR = 0V, f = 1MHz | 3 |
| Junction capacitance | CJ |  | 11.5 | 16 | pF | VR = 5V, f = 1MHz | 3 |
| Reverse breakdown voltage | VBR |  | 5.1 |  | V | IBR = 1mA | 3 |
| Reverse holding voltage | VHOLD |  | 5.1 |  | V | IHOLD = 50mA | 3 |
| Clamping voltage (TLP) | VCL |  | 9 |  | V | IPP = 16A, tp = 100ns | 3 |
| Clamping voltage (ESD contact) | VCL |  | 9 |  | V | VESD = 8kV | 3 |
| Clamping voltage | VCL |  | 6.5 |  | V | IPP = 1A, tp = 8/20μs | 3 |
| Clamping voltage | VCL |  | 8.5 |  | V | IPP = 5A, tp = 8/20μs | 3 |
| Clamping voltage | VCL |  | 10 |  | V | IPP = 8A, tp = 8/20μs | 3 |
| Dynamic resistance | RDYN |  | 0.2 |  | Ω |  | 3 |

## CAD (KiCad official)

- Symbol: `ESD5452E-3`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `esd5452e-3-etched.step` / `esd5452e-3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd5452e-3.step` / `esd5452e-3.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [WILLSEMI Will Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589784854537154560) (6 pp, sha256 `70e9aa2c67801336`, retrieved 2026-10-17, 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/esd5452e-3-datasheet.pdf)