component
AQ3522-01FTG
Public Made by Adomby adom
Littelfuse ESD And Surge Protection (TVS/ESD), SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownAQ3522-01FTG
Littelfuse · ESD And Surge Protection (TVS/ESD) · SOD-323
AQ3522-01FTG 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 | 1 | passive | Bidirectional TVS diode terminal (Pin 1) protecting high-speed signal lines, with ±22kV contact / ±30kV air IEC 61000-4-2 ESD withstand and 0.15pF typical capacitance at 3GHz. |
| 2 | 2 | passive | Bidirectional TVS diode terminal (Pin 2) with 5V reverse standoff voltage and 8.5V minimum breakdown at 1mA; either terminal may connect to the signal line or to ground. |
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 |
|---|---|---|---|---|---|---|---|
| Reverse Standoff Voltage | VRWM | 5 | V | IR=1μA | 2 | ||
| Breakdown Voltage | VBR | 8.5 | 9.2 | V | IR=1mA | 2 | |
| Reverse Leakage Current | ILEAK | 0.02 | 0.1 | μA | VR=5V | 2 | |
| Clamp Voltage | VC | 15.5 | 18 | V | IPP=2.5A, tp=8/20µs, I/O to GND | 2 | |
| Peak Current | IPP | 2.5 | A | tp=8/20μs | 2 | ||
| Operating Temperature | TOP | -40 | 150 | °C | 2 | ||
| Storage Temperature | TSTOR | -55 | 150 | °C | 2 | ||
| Dynamic Resistance | RDYN | 1.2 | Ω | TLP, tp=100ns, I/O to GND | 2 | ||
| ESD Withstand Voltage (Contact) | VESD | 22 | kV | IEC 61000-4-2 (Contact) | 2 | ||
| ESD Withstand Voltage (Air) | VESD | 30 | kV | IEC 61000-4-2 (Air) | 2 | ||
| Diode Capacitance | CI/O-GND | 0.15 | pF | Reverse Bias=0V, f= 3 GHz | 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 | 4 |
CAD (KiCad official)
- Symbol:
AQ3522-01FTG - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
aq3522-01ftg-etched.step/aq3522-01ftg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);aq3522-01ftg.step/aq3522-01ftg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (5 pp, sha256
da94c5b4644a64b8, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).