Footprint

QFN-20-1EP

Quad Flat No-lead — 20-pin leadless package with exposed thermal pad

⚡ Install this footprint

Paste this into Claude Code (VS Code panel, Adom editor, or terminal) to install:

Search the Adom Wiki for the footprint "QFN-20-1EP" (slug: qfn-20-1ep) at https://wiki-ufypy5dpx93o.adom.cloud/wiki/footprints/qfn-20-1ep. Download the .kicad_mod file and any .glb 3D model from the wiki page's static assets. Add the footprint to my current KiCad project's footprints/ directory and register in fp-lib-table.
Category IC Package
Library Package_DFN_QFN
Footprint QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm
Pads 21
Pitch 0.5mm
Body Size 4.0 x 4.0mm
Mounting Surface Mount
Footprint
3D Model

AI Skill Technical Reference

Edit AI Skill

QFN-20-1EP

Package: QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm Library: Package_DFN_QFN Category: IC Package Pads: 21 Pitch: 0.5mm Body Size: 4.0 x 4.0mm Mounting: Surface Mount

Description

The QFN-20-1EP is a modern 20-pin Quad Flat No-lead package with an exposed thermal pad. The leadless design (4 x 4mm body, 0.5mm pitch) provides smaller footprint than equivalent leaded packages while offering superior thermal and electrical performance through the exposed pad. The 2.5 x 2.5mm thermal pad provides excellent heat dissipation. Used for sensor ICs, small microcontrollers, RF transceivers, and power management chips.

Usage Notes

  • Designed for reflow soldering (paste stencil recommended)
  • Pad size optimized for 0.5mm pitch components
  • Follow IPC-7351 land pattern guidelines

KiCad Library Reference

This footprint is from the official KiCad Package_DFN_QFN library. Full identifier: Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm

To use in your project:

  1. Open the Footprint Library Manager in KiCad
  2. Search for QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm
  3. Assign to your schematic symbol in the Symbol Properties dialog

Sub-Skills
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What are Sub-Skills?

Sub-skills are community-contributed AI skill extensions for this component. They teach AI assistants about specific tools, configurators, or workflows.

Examples:

  • A manufacturer’s configuration tool for a motor controller
  • A community-written design guide for an amplifier circuit
  • An automated test/validation script for a sensor module

How to add one: Click Add Sub-Skill, provide the URL to your skill and a brief description. Submissions are reviewed by the Adom team before going live.

No sub-skills yet. Be the first to contribute one!

0 revisions · KiCad Library: Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm · Updated 2026-03-02 17:31:36