# AQ4024-01FTG

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

AQ4024-01FTG from Littelfuse, 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 | Pin 1 | passive | Cathode side of the unidirectional TVS diode (cathode polarity marking for unidirectional parts); protected line connection, 24V reverse standoff (VRWM) and 26V breakdown at 1mA, Pin 1 to Pin 2. |
| 2 | Pin 2 | passive | Second terminal of the TVS diode (anode side for the unidirectional AQ4024-01FTG), typically ground reference; ±30kV ESD and 7A (8/20µs) surge protection between Pin 1 and Pin 2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | SOD-323 |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating Temperature | TOP | -40 |  | 150 | °C |  | 2 |
| Storage Temperature | TSTOR | -55 |  | 150 | °C |  | 2 |
| Peak Current | IPP |  |  | 7 | A | tp=8/20μs | 2 |
| Peak Pulse Power | PPk |  |  | 350 | W | tp=8/20μs | 2 |
| Diode Capacitance | CD |  | 1.3 | 2 | pF | Reverse Bias=0V, f=1MHz, Pin 1 to Pin 2 | 2 |
| ESD Withstand Voltage (Contact Discharge) | VESD | 30 |  |  | kV | IEC 61000-4-2 (Contact Discharge) | 2 |
| ESD Withstand Voltage (Air Discharge) | VESD | 30 |  |  | kV | IEC 61000-4-2 (Air Discharge) | 2 |
| Reverse Standoff Voltage | VRWM |  | 24 |  | V | IR≤1μA with Pin 1 to Pin 2 | 2 |
| Breakdown Voltage | VBD |  | 26 |  | V | IT=1mA with Pin 1 to Pin 2 | 2 |
| Leakage Current | ILEAK |  | 0.5 |  | μA | VR=24V with Pin 1 to Pin 2 | 2 |
| Clamp Voltage | VC |  | 34 |  | V | IPP=1A, tp=8/20µs, Fwd | 2 |
| Clamp Voltage | VC |  | 36 |  | V | IPP=2A, tp=8/20µs, Fwd | 2 |
| Clamp Voltage | VC |  | 43 |  | V | IPP=5A, tp=8/20µs, Fwd | 2 |
| Clamp Voltage | VC |  | 48 |  | V | IPP=7A, tp=8/20µs, Fwd | 2 |
| Dynamic Resistance | RDYN |  | 0.7 |  | Ω | TLP tp=100ns, Pin 1 to Pin 2 | 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 | tin | Lead Plating Matte tin Lead Material Copper Alloy | 3 |

## CAD (KiCad official)

- Symbol: `AQ4024-01FTG`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `aq4024-01ftg-etched.step` / `aq4024-01ftg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `aq4024-01ftg.step` / `aq4024-01ftg.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/8588938419019911168) (4 pp, sha256 `28c8579bf92430d4`, retrieved 2026-11-06, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/aq4024-01ftg-datasheet.pdf)