component
AQ4021-01FTG-C
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
markdownAQ4021-01FTG-C
Littelfuse · ESD And Surge Protection (TVS/ESD) · SOD-323
AQ4021-01FTG-C 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 | Pin 1 of the bidirectional AQ4021-01FTG-C TVS diode (marking 5C), protecting against ESD up to ±30kV and 25A 8/20μs surge with 2.5pF capacitance. |
| 2 | 2 | passive | Pin 2 of the bidirectional AQ4021-01FTG-C TVS diode (marking 5C), protecting against ESD up to ±30kV and 25A 8/20μs surge with 2.5pF capacitance. |
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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | VBD | 6.3 | V | IR=2uA | 2 | ||
| Reverse Standoff Voltage | VRWM | 5 | V | IR≤1μA | 2 | ||
| Leakage Current | ILEAK | 0.5 | μA | VR=5.0V | 2 | ||
| Clamp Voltage | VC | 9.3 | V | IPP=1A, tp=8/20µs, Fwd | 2 | ||
| Clamp Voltage | VC | 14 | V | IPP=10A, tp=8/20µs, Fwd | 2 | ||
| Clamp Voltage | VC | 20.5 | V | IPP=25A, tP=8/20μs, Fwd | 2 | ||
| ESD Withstand Voltage (Contact) | VESD | 30 | kV | IEC 61000-4-2 (Contact Discharge) | 2 | ||
| ESD Withstand Voltage (Air) | VESD | 30 | kV | IEC 61000-4-2 (Air Discharge) | 2 | ||
| Dynamic Resistance | RDYN | 0.35 | Ω | TLP, tP=100ns, I/O to GND | 2 | ||
| Diode Capacitance | CD | 2.5 | pF | Reverse Bias=0V, f=1MHz | 2 | ||
| Peak Current | IPP | 25 | A | tp=8/20μs | 2 | ||
| Peak Pulse Power | PPk | 600 | W | tp=8/20μs | 2 | ||
| Operating Temperature | TOP | -40 | 150 | °C | 2 | ||
| Storage Temperature | TSTOR | -55 | 150 | °C | 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:
AQ4021-01FTG-C - Footprint:
Diode_SMD:D_SOD-323 - 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files:
aq4021-01ftg-c-etched.step/aq4021-01ftg-c-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);aq4021-01ftg-c.step/aq4021-01ftg-c.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (5 pp, sha256
89bd2ee03862d4d0, 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).