EasyEDA Component Library: The Complete Guide to 700,000+ Parts (2025)

Library Types and Sources

EasyEDA organizes components into several library sources:

Library Structure Explained

EasyEDA libraries contain different types of elements:

• Symbols — Schematic representations of components
• Spice Symbols — Components configured for SPICE simulation
• Footprints — PCB land patterns for physical mounting
• SCH Modules — Reusable circuit blocks that separate when placed
• PCB Modules — Reusable PCB layout sections
• 3D Models — Visual 3D representations linked to footprints

In EasyEDA Standard, symbols and footprints are separate entities that you link together. In EasyEDA Pro, a "Device" combines Symbol + Footprint + 3D Model + Properties into a unified component, making library management more streamlined.

Basic Search Techniques

Access the library via SHIFT+F or the "Library" button in the left panel. Here are the basic search methods:

1. Search by Part Number

If you know the exact part number, type it directly into the search box:

Examples:
MAX232          → Find MAX232 RS-232 transceiver
LM7805          → Find 7805 voltage regulator
ESP32-WROOM-32  → Find ESP32 module

2. Search by Value + Footprint

Combine component values with package sizes for quick filtering:

Examples:
1k 0603     → 1kΩ resistor in 0603 package
100nF 0402  → 100nF capacitor in 0402 package
10uF 0805   → 10µF capacitor in 0805 package

3. Quick Filter

Use the Filter function to narrow results. Type a keyword like "0603" to instantly filter all components with that footprint size.

Advanced Parameter Search

For more specific searches, use the category navigation:

1. Select the Library Type (LCSC, System, etc.)
2. Click Table of Contents to open the category tree
3. Navigate through categories: Resistors → Chip Resistors → 0603
4. Browse or search within that category

Using LCSC Search Engine

The LCSC Search Engine provides powerful parameter-based searching similar to lcsc.com:

1. In the Library panel, click "Search Engine - LCSC Electronics"
2. Search by parameters: voltage, current, tolerance, package, etc.
3. View pricing, stock levels, and datasheets
4. Place components directly into your schematic

This is the best method when you need parts with specific electrical characteristics.

Finding JLCPCB Assembly Parts

If you're planning to use JLCPCB's SMT assembly service, understanding the difference between Basic and Extended parts is critical for cost optimization.

Finding Basic Parts Efficiently

1. Go to jlcpcb.com/parts
2. Enable "Basic Parts" filter
3. Search for your required component
4. Copy the LCSC part number (C1234567)
5. Paste into EasyEDA's library search

In EasyEDA, you can also filter for "LCSC Assembled" and sort by the SMT Type column, but the jlcpcb.com/parts database is more reliable.

Placement Workflow

EasyEDA uses a click-click placement methodology (not drag-and-drop):

1. Find the component in the Library panel
2. Click on the component to select it
3. Move your mouse to the schematic canvas
4. Left-click to place the component
5. Continue clicking to place multiple instances
6. Press ESC or right-click to exit placement mode

Multi-Part Components

Complex ICs like the 74HC04 Hex Inverter are split into multiple sub-parts for schematic clarity:

• Each logic gate is a separate part (U?.1, U?.2, etc.)
• Power pins (VCC/GND) are typically in a dedicated part
• This reduces schematic clutter and improves readability

When placing multi-part components, you can place different parts from the same IC in different locations on your schematic. EasyEDA will assign them the same reference designator (e.g., U1.1, U1.2).

Keyboard Shortcuts for Speed

Master these shortcuts to dramatically speed up your workflow:

Symbol Creation Basics

1. Go to File → New → Symbol
2. Consult your component's datasheet for pin configuration
3. Draw the symbol outline using rectangles, lines, and arcs
4. Add pins using the P hotkey
5. Configure each pin's properties
6. Set component attributes (Name, Prefix, Footprint)
7. Save to your personal library with CTRL+S

Pin Configuration

Pin configuration is critical for proper schematic-to-PCB conversion. Each pin has several important properties:

Pin Placement Best Practices

• Pin dot must point outward — Away from the symbol body
• Keep pins on grid — Enables clean wire connections
• Group related pins — VCC/GND together, data lines together
• Use standard orientations — Inputs on left, outputs on right

Using the Symbol Wizard

For ICs with many pins, the Symbol Wizard can generate symbols automatically:

1. Open the Symbol Editor
2. Go to Tools → Symbol Wizard
3. Enter pin names and numbers
4. Configure pin electrical types
5. Click Update Symbol
6. Adjust the layout as needed
7. Save to your personal library

The Symbol Wizard is excellent for quickly creating symbols for dual inline packages (DIP), QFP, and other standard IC formats.

Footprint Creation Basics

Creating accurate footprints is essential for successful PCB manufacturing. Follow these steps:

1. Get the datasheet — Download the component's technical documentation
2. Identify orientation — Note the 0° reference position
3. Note dimensions — Land pattern, pad sizes, pitch
4. Go to File → New → Footprint
5. Set grid and snap — Match your package pitch (e.g., 100mil for DIP)
6. Place pads — Use the P hotkey
7. Draw silkscreen — Switch to TopSilkLayer
8. Add pin 1 marker — Use a dot or triangle
9. Set origin — Use "Set Canvas Origin → By Center of Pads"
10. Verify dimensions — Tools → Check Dimension
11. Save with CTRL+S

Pad Types and Configuration

EasyEDA supports four pad shapes:

• Round — Through-hole components, test points
• Rectangular — SMD components (most common)
• Oval — Through-hole with slot tolerance
• Polygon — Custom shapes for special components

Key Pad Properties

Using the Footprint Wizard

EasyEDA Pro includes a Footprint Wizard that generates common package types:

1. Select the footprint type (SOIC, QFP, DIP, etc.)
2. Enter physical dimensions from the datasheet
3. The wizard automatically reserves pad margins
4. Customize thermal pad and solder paste settings if needed
5. Generate and adjust as necessary

Note that wizard-generated dimensions are for reference. Always verify against the component datasheet.

IPC-7351 Compliance

IPC-7351 is the industry standard for land pattern design. Key specifications include:

• Pad geometry — Shape, dimensions, spacing
• Component orientation — Standard 0° reference
• Courtyard area — Keep-out zone around component
• Solder mask and paste — Opening sizes and clearances

Using the Footprint Manager

The Footprint Manager connects schematic symbols to PCB footprints. Access it via Tools → Footprint Manager or the shortcut Alt+F.

1. Open the Footprint Manager
2. Select a component from the list
3. Double-click the desired footprint to assign it
4. Verify pin-to-pad assignments
5. Click Update to apply changes

Pin-to-Pad Mapping

The Footprint Manager shows how symbol pins map to footprint pads. Verify that:

• Pin 1 connects to Pad 1
• All pins have corresponding pads
• No pins are left unmapped
• Orientation matches your component placement intent

For custom footprints, you may need to manually adjust the pin-to-pad mapping if the automatic assignment is incorrect.

Attaching 3D Models

3D models enhance visualization and enable enclosure design integration. EasyEDA supports OBJ and WRL formats.

Importing 3D Models

1. Prepare your model in OBJ or WRL format
2. For OBJ files, zip together with the MTL material file
3. Open your PCB or Footprint
4. Go to Tools → 3D Model Manager
5. Click Import and select your file
6. Adjust position, rotation, and scale
7. Click Update to bind the model

Using Favorites

Favorites provide quick access to frequently used components:

• Click the heart icon on any component to add to Favorites
• Access favorites in Library → Favorites
• Favorites are references, not copies—they update with the source library
• Use for components you place in every project

For infrequently used parts, simply search and place directly—no need to favorite.

Personal Library Organization

Your personal library stores custom components you've created or imported:

• Location: Library → Symbols/Footprints → Workspace
• Double-click any personal part to edit and refine it
• Use descriptive names and tags for easy searching
• Include datasheet links in component descriptions

Suggested Naming Convention

[MANUFACTURER]_[PART_NUMBER]_[PACKAGE]

Examples:
TI_LM7805_TO220
ESPRESSIF_ESP32-WROOM-32_MODULE
VISHAY_0603_0R1_1PCT

Project Libraries

The Project Library contains all components placed in the current project:

• Automatically populated when you place components
• Serves as a historical record of all devices used
• Deleted components remain for reference
• Modified components apply only to the current project

Saving Project Components to Personal Library

1. Open the project's Library panel
2. Select Project Library
3. Right-click the component(s) to save
4. Select Save As
5. Choose destination in your personal library

Team Library Sharing

For team collaboration, you can share your personal libraries:

1. Go to User Center → Libraries → Personal
2. Select components to share
3. Transfer to the team library

This ensures all team members use the same verified components, reducing errors and maintaining design consistency.

Importing from SamacSys

1. Visit componentsearchengine.com
2. Search for your component
3. Download the Eagle format (.lbr file)
4. In EasyEDA, go to File → Import → Eagle
5. Select the downloaded .lbr file
6. Check both symbol and footprint boxes
7. Click Add to My Library

Importing from SnapEDA

1. Visit snapeda.com
2. Search for your component
3. Download the Eagle format
4. Import using EasyEDA's Eagle import feature
5. Add symbols and footprints to your library

Importing from Ultra Librarian

1. Visit ultralibrarian.com
2. Search and download in Eagle format
3. Import through EasyEDA's Eagle import
4. Verify footprints against datasheets

Library Versioning

Starting with EasyEDA v6.4.20.8, the editor maintains version history for symbols and footprints:

• Each save creates a new version record
• Placed components use the version from when they were placed
• Library updates don't automatically affect existing designs
• You choose when to update components in your schematics

This protects your designs from unexpected changes when libraries are updated.

Syncing Schematic to PCB

After modifying schematics, synchronize changes to the PCB:

1. In the schematic, go to Design → Update Components from Library
2. Review changes and confirm updates
3. Switch to the PCB editor
4. Go to Design → Import Changes
5. Apply the modifications

Updating Footprints

If you've edited a footprint after placing it in a design:

1. Open the schematic
2. Use the Footprint Manager (Alt+F)
3. Select the component(s) to update
4. Re-assign the updated footprint
5. Import changes to PCB