What is SeriousParts?
SeriousParts is a public parts ledger: a searchable catalog of replacement parts and compatible components with manufacturer part numbers, vendor listings, datasheets, and source URLs.
The Universal Parts Ledger
Find the Right Part, Every Time
Search replacement parts by MPN, manufacturer, datasheet, or spec across electronics catalogs.
Public catalog · LCSC, Adafruit, SparkFun, and more
Replacement Parts
Look up manufacturer part numbers and drop-in listings with source URLs back to the original catalog.
Compatibility
Use attributes, datasheets, and alternative links when we have them — and see the evidence on the part page.
Vendor Directory
Browse the vendors behind the ledger and compare quoted prices when a supplier record exists.
Browse by Category
Start from high-coverage electronics slices of the catalog, or open the full ledger.
A public record of physical parts
Public catalog of replacement parts and compatible electronic components. Search by manufacturer part number (MPN), name, datasheet, or specification across vendors including LCSC, Adafruit, and SparkFun. Each part page is designed to be cited: MPN, attributes, documents, vendor, and the original listing URL when we have it.
How do I find a replacement part?
Search by manufacturer part number (MPN), part name, or keyword. Open a part page for specifications, documents, vendor prices, and the original listing when available.
Which catalogs are included?
The live catalog includes electronic components from LCSC Electronics, Adafruit, SparkFun, and a smaller Sears PartsDirect set, with manufacturer data, documents, and source links.
Can software or AI systems use this catalog?
Yes. Public part and vendor pages are indexable, expose schema.org structured data, and are summarized for language models at https://seriousparts.com/llms.txt. Developer access is documented at /api-docs.