BOM scrub
Normalize MPNs, flag NRND/obsolete and ask for clarifications on ambiguous lines.
Component sourcing
Component Purchasing Services for PCB Assembly
XFPCB purchases and kits electronic components against your BOM so assembly is not waiting on missing passives, connectors or ICs. We validate manufacturer part numbers and respect your approved-vendor rules.
Purchasing Built for Assembly
Component buying for PCBA fails when descriptions replace MPNs or when alternates are assumed. XFPCB scrubs the BOM for missing manufacturer names, obsolete status and packaging mismatches before placing orders.
You can run full turnkey purchasing or a hybrid kit where you consign security-sensitive ICs and we buy the remainder.
Purchasing Workflow
Sourcing
Buy from authorized or customer-approved channels per your rules; report lead times early.
Incoming check
Verify part marking, quantity and packaging before kitting to the SMT line.
Kit to build
Issue parts to the assembly traveler with DNP and substitute records attached.
Sourcing Controls
- No silent substitutes on lines marked do not sub.
- Customer-furnished parts are logged separately from purchased stock.
- ESD- and moisture-sensitive parts stay in proper packing until open-bag time.
- Price and lead-time changes on constrained parts are communicated before purchase when possible.
Purchasing Scope
| Project Area | XFPCB Guidance |
|---|---|
| Best inputs | MPN, manufacturer, reference designator, quantity, DNP |
| Common buys | Passives, connectors, regulators, MCUs, LEDs |
| Customer often consigns | Programmed MCUs, FPGAs, custom ASICs |
| Output | Kitted parts ready for XFPCB SMT/THT assembly |
BOM Quality Checklist
Manufacturer Part Numbers
Every electrical line should carry a real MPN - not only a generic description.
Alternate Rules
List approved alternates or state that no substitutes are allowed.
Quantity & Attrition
Share build quantity plus expected attrition for low-value chip parts when you want extras purchased.
Useful Terms
- MPN
- Manufacturer part number.
- AVL
- Approved vendor list.
- Consigned parts
- Components you ship to XFPCB for the build.
- Kitting
- Grouping all parts for one assembly job.
Related XFPCB Pages
Component Purchasing Services for PCB Assembly FAQs
Do I need manufacturer part numbers?
Yes for reliable purchasing. Descriptions alone force clarification loops and increase counterfeit risk.
Can XFPCB suggest alternates?
We can suggest alternates when your AVL allows. Restricted lines stay locked to the named MPN unless you approve a change.
How are consigned parts handled?
Ship them labeled by job and reference designator. We inspect incoming quantity and kit them with purchased parts.
What causes purchasing delays?
Obsolete MPNs, missing package info, and unclear substitute policy. A clean BOM shortens both quote and buy cycles.
Request Component Purchasing Support
Send your BOM and assembly quantity so we can scrub MPNs and return lead-time risks with the PCBA quote.
- Include manufacturer names and MPNs for every line.
- Mark consigned parts and no-substitute parts.
- State destination and whether parts ship only for XFPCB assembly.