# AQ4337-01ETG

**LITTELFUSE** · ESD And Surge Protection (TVS/ESD) · SOD-882

AQ4337-01ETG from LITTELFUSE, in a SOD-882. 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 | One of the two terminals of this bidirectional TVS; the datasheet gives a 5V reverse standoff voltage, 0.25pF typical capacitance at 0V, and clamp and ESD ratings measured I/O to GND, but does not state which terminal is I/O and which is GND. |
| 2 | 2 | passive | The other of the two terminals of this bidirectional TVS; the datasheet gives a 5V reverse standoff voltage, 0.25pF typical capacitance at 0V, and clamp and ESD ratings measured I/O to GND, but does not state which terminal is I/O and which is GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LITTELFUSE |
| Package | SOD-882 |
| Category | Circuit 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 Current (tp=8/20μs) | IPP |  |  | 7 | A | tp=8/20μs | 2 |
| Operating Temperature | TOP | -40 |  | 150 | °C |  | 2 |
| Storage Temperature | TSTOR | -55 |  | 150 | °C |  | 2 |
| Reverse Leakage Current | ILEAK |  | 10 | 100 | nA | VR=5V | 2 |
| ESD Withstand Voltage (IEC 61000-4-2 Contact Discharge) | VESD | -15 |  | 15 | kV | IEC 61000-4-2 (Contact Discharge) | 2 |
| ESD Withstand Voltage (IEC 61000-4-2 Air Discharge) | VESD | -15 |  | 15 | kV | IEC 61000-4-2 (Air Discharge) | 2 |
| ESD Withstand Voltage (ISO10605 Contact Discharge) | VESD | -15 |  | 15 | kV | ISO10605 (Contact Discharge) | 2 |
| ESD Withstand Voltage (ISO10605 Air Discharge) | VESD | -15 |  | 15 | kV | ISO10605 (Air Discharge) | 2 |
| Diode Capacitance | CIO-GND |  | 0.25 |  | pF | Reverse Bias=0V, f=1MHz, I/O to GND | 2 |

## 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 | Copper Alloy |  | Lead Plating Pre-Plated Frame Lead material Copper Alloy | 4 |

## CAD (KiCad official)

- Symbol: `AQ4337-01ETG`
- Footprint: `Diode_SMD:D_SOD-882`
- 3D model: SOD-882 (KiCad packages3D, STEP)
- 3D model files: `aq4337-01etg-etched.step` / `aq4337-01etg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `aq4337-01etg.step` / `aq4337-01etg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LITTELFUSE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755937441255563264) (5 pp, sha256 `2b9b1eedddde18c9`, 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/aq4337-01etg-datasheet.pdf)