| name | jlcpcb-component-finder |
| description | Search the JLCPCB electronic components database (~7 million parts) for hardware/electronics projects. Use when the user needs to: (1) Find electronic components (resistors, capacitors, inductors, ICs, connectors, diodes, transistors, MOSFETs, op-amps, microcontrollers, sensors, LEDs, etc.), (2) Look up specific part numbers, LCSC numbers (C-prefix), or manufacturer part numbers, (3) Find alternatives or equivalents for components, (4) Check component availability and stock at JLCPCB/LCSC, (5) Get component specifications (package type, footprint, description), (6) Search for parts for PCB assembly (PCBA) projects, (7) Find SMD or through-hole components, (8) Look up voltage regulators (LDO, linear, switching), audio jacks, connectors, or any other electronic parts. Keywords: JLCPCB, LCSC, electronic components, PCB parts, SMT assembly, BOM, bill of materials, component sourcing. |
JLCPCB Parts Finder
Search the JLCPCB electronic components database (~7 million parts) for hardware/electronics projects. Use when the user needs to: (1) Find electronic components (resistors, capacitors, ICs, connectors, etc.), (2) Look up specific part numbers or manufacturers, (3) Find alternatives or equivalents for components, (4) Check component availability and stock at JLCPCB, (5) Get component specifications (package type, description, etc.), or (6) Search for parts for PCB assembly projects.
Database Location
Database: ~/.jlcpcb-db/cache.sqlite3
If missing, user should download from https://yaqwsx.github.io/jlcparts/
Query Script
Use ~/.claude/skills/jlcpcb-component-finder/query.js for all database queries.
List categories:
node ~/.claude/skills/jlcpcb-component-finder/query.js list-categories
Search parts:
node ~/.claude/skills/jlcpcb-component-finder/query.js search-parts <category_id> [keyword] [limit]
Examples:
node ~/.claude/skills/jlcpcb-component-finder/query.js search-parts 208 "3.5" 10
node ~/.claude/skills/jlcpcb-component-finder/query.js search-parts 111 "LDO" 15
node ~/.claude/skills/jlcpcb-component-finder/query.js search-parts 208 "" 20
Common Categories
Quick reference for frequently used categories:
- Audio Connectors: 208
- Linear Voltage Regulators: 130
- LDO Regulators: 111, 120
- PMIC - Current & Power Monitors & Regulators: 512
For other categories, use list-categories to find the appropriate ID.
Workflow
- Understand request - What component does the user need?
- Find category:
- If known, proceed to search
- If unknown, list categories to find the right one
- Search parts with category ID and optional keyword
- Present results:
- Part number (C-prefix LCSC number)
- Manufacturer
- Description
- Package type
- Stock availability
- Detail page URL for each part
Output Format
Results from query.js are formatted as:
C{lcsc}: {mfr} - {description} ({package}, Stock: {stock})
→ https://jlcpcb.com/partdetail/C{lcsc}
Example:
C5155561: PJ-393-8P - 3.5mm Headphone Jack 1A -20℃~+70℃ 20V Gold Phosphor Bronze SMD Audio Connectors (SMD, Stock: 1995)
→ https://jlcpcb.com/partdetail/C5155561
Important: Always include the URL in your response so users can view detailed specifications and datasheets.
Tips
- Start with broader keywords if specific searches return no results
- Part numbers may vary (e.g., "7812" vs "LM7812")
- Results are sorted by stock (descending) - highest stock first
- Limit initial searches to 10-20 results to avoid overwhelming output
- For DIY projects, suggest through-hole over SMD when appropriate
- Always show stock availability in recommendations
SQL Reference
The query script uses these SQL patterns:
With keyword:
SELECT lcsc, mfr, description, package, stock
FROM components
WHERE category_id = ? AND (mfr LIKE ? OR description LIKE ?)
ORDER BY stock DESC LIMIT ?
Without keyword:
SELECT lcsc, mfr, description, package, stock
FROM components
WHERE category_id = ?
ORDER BY stock DESC LIMIT ?
Alternative: Use sqlite3 CLI directly if needed:
sqlite3 ~/.jlcpcb-db/cache.sqlite3 "SELECT id, category, subcategory FROM categories LIMIT 10"
