# ESD9B3.3ST5G-ES

**ElecSuper** · ESD Protection Devices · SOD-923

ESD9B3.3ST5G-ES from ElecSuper, in a SOD-923. 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 | IO1 | bidirectional | Connects to the protected I/O line; the device is a bi-directional ESD protector with 3.3 V peak reverse working voltage (VRWM) and IEC 61000-4-2 Level 4 protection of ±25 kV contact and ±25 kV air discharge. |
| 2 | IO2 | bidirectional | Connects to the protected I/O line; the device is a bi-directional ESD protector with 3.3 V peak reverse working voltage (VRWM) and IEC 61000-4-2 Level 4 protection of ±25 kV contact and ±25 kV air discharge. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ElecSuper |
| Package | SOD-923 |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak pulse power (tp=8/20us)@25℃ | Ppk |  |  | 100 | W | tp=8/20us @25℃ | 2 |
| Peak pulse current (tp=8/20us)@25℃ | IPP |  |  | 12 | A | tp=8/20us @25℃ | 2 |
| ESD (IEC61000-4-2 air discharge) @25℃ | VESD |  |  | 25 | kV | IEC61000-4-2 air discharge @25℃ | 2 |
| ESD (IEC61000-4-2 contact discharge) @25℃ | VESD |  |  | 25 | kV | IEC61000-4-2 contact discharge @25℃ | 2 |
| Junction temperature | TJ |  |  | 150 | ℃ |  | 2 |
| Operating temperature | TOP | -40 |  | 125 | ℃ | Over operating free-air temperature range | 2 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 2 |
| Lead temperature | TL |  |  | 260 | ℃ |  | 2 |
| Clamping Voltage | VC |  | 5 | 6 | V | IPP=1A; tp=8/20us | 3 |
| Clamping Voltage | VC |  | 7 | 8 | V | IPP=12A; tp=8/20us | 3 |
| Junction Capacitance | CJ |  | 15 | 20 | pF | I/O to GND; VR=0V; f=1MHz | 3 |
| Reverse Stand-off Voltage | VRWM |  |  | 3.3 | V |  | 3 |
| Reverse Breakdown Voltage | VBR | 3.7 |  |  | V | IT=1mA | 3 |
| Reverse Leakage Current | IR |  |  | 1 | uA | VRWM=3.3V | 3 |

## CAD (KiCad official)

- Symbol: `ESD9B3.3ST5G-ES`
- Footprint: `Diode_SMD:D_SOD-923`
- 3D model: SOD-923 (KiCad packages3D, STEP)
- 3D model files: `esd9b3-3st5g-es-etched.step` / `esd9b3-3st5g-es-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd9b3-3st5g-es.step` / `esd9b3-3st5g-es.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ElecSuper datasheet](docs/esd9b3-3st5g-es-datasheet.pdf) (6 pp, sha256 `9816a8719a7c1e8b`, retrieved 2026-10-21, 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/esd9b3-3st5g-es-datasheet.pdf)