Designing around available parts
At a glance
- Compare exact manufacturer, MPN and package matches from DigiKey, Mouser and LCSC/JLCPCB when each connector is authorized
- Every provider reports ready, blocked, quota, rate-limit, auth, outage, invalid-response or stale state independently
- Stock can be a known number or unknown; unknown is never shown as zero
- Quotes carry currency, price breaks, order constraints, fetched time and expiry
- Save the approved sourcing decision in the project so it remains explicit offline
- Pinning a manufacturer part number prevents automatic substitution
Choose the electrical and physical requirements first, then compare orderable parts by exact manufacturer, MPN and package. JetCad3 can query DigiKey, Mouser and LCSC/JLCPCB through its website service when each provider is authorized and ready. Supplier credentials never enter the desktop application.
Provider state is part of the answer
Each provider reports its own state. Blocked means its all-user service permission or deployment gate is incomplete. Quota, rate limiting, authentication failure, outage, invalid response and stale cache are separate states. One provider failing does not turn another provider's result into a pass.
As of September 12, 2026, the shared connectors still require documented all-user permission before they can be enabled. A blocked connector is expected until that evidence exists. JetCad3 does not scrape a replacement source or label bundled example rows as live stock.
What an offer means
An offer carries the exact manufacturer and MPN, package, supplier SKU, currency, stock as a known number or unknown, minimum/order multiple, price breaks, lifecycle, product link, fetched time and expiry. LCSC can carry JLCPCB assembly eligibility when the approved response provides it. Missing eligibility remains unknown.
A cached quote is marked stale after its freshness window. Unknown is never rewritten as zero, and a missing price is never presented as free.
Save the decision
Compare offers against quantity, budget, lifecycle, package, temperature and assembly requirements. Saving a choice writes the exact sourcing evidence into the project. The decision remains readable offline with its original provider and capture time. It is not silently replaced when a fresher quote appears.
A manually pinned manufacturer part number always wins. Changing the footprint, MPN or physical requirement makes dependent sourcing evidence stale and requires a new review.