component

AQ4021-01FTG-C

Public Made by Adom

by adom

Littelfuse ESD And Surge Protection (TVS/ESD), SOD-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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AQ4021-01FTG-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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); aq4021-01ftg-c.step / aq4021-01ftg-c.glb are 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, 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