A bill of materials (BOM) is the list of manufacturer part numbers required to build a board, assembly, or repair kit. BOM search lets buyers paste that list into a marketplace and see which lines are in stock from registered suppliers — instead of searching one MPN at a time.
Why procurement teams use BOM search
Contract manufacturers, repair depots, and OEM procurement desks often need dozens or hundreds of lines at once. Single-part search works for one shortage; BOM search works for production planning, end-of-life redesigns, and cost-down projects.
Free BOM search on USParts.us runs an indexed lookup across supplier inventory so you can compare availability before contacting vendors individually.
How to format a BOM for upload
You do not need a formal ERP export. A simple list of MPNs — one per line or separated by spaces — is enough to start. Include manufacturer names in your internal worksheet if you have them, but our part search primarily matches on part numbers and known aliases.
- One MPN per line is easiest to review
- Space-separated lists also work for quick checks
- Package variants (LM358N vs LM358D) may match related suffixes
- Re-run the BOM after updating your internal shortage list
When BOM search beats broker calls
Brokers are useful for hard-to-find lines, but calling for every BOM line is slow. BOM search shows what is already published in US supplier inventory. Use quote requests on matching listings to confirm price, date code, and lead time before you pick up the phone.
Ready to search or list parts?
Use free BOM search to source components, or list your surplus inventory so buyers can find your MPNs on USParts.us.