Short answer: A fully assembled PCB prototype from a European EMS typically takes 10–15 working days from complete files to shipment: 1–2 days for quote and DFM review, 5–10 days for bare boards and components, 2–3 days for assembly and 1–2 days for test and dispatch. Expedited runs of 5–8 working days are possible when the bare PCB is quick-turned and every component is in stock. Component availability, not assembly capacity, is the usual reason a date slips.
Where the days actually go
| Phase | Standard | Expedited | What you control |
|---|---|---|---|
| Quote and DFM review | 1–2 working days | same day | Complete Gerber, BOM, pick-and-place |
| Bare PCB fabrication | 5–8 working days | 2–3 working days | Layer count, standard stack-up, standard finish |
| Component procurement | in parallel, 3–10 days | in stock only | Alternates in the BOM, no long-lead parts |
| SMT/THT assembly | 2–3 working days | 1–2 working days | Panelisation, no manual rework |
| Test, inspection, shipping | 1–2 working days | 1 day | Test spec agreed up front |
The four things that decide the date
- Component availability: one part on 16-week allocation delays the whole board. A BOM with alternates is the single biggest lead-time saver.
- Bare PCB complexity: 4-layer, ENIG, standard tolerances ship in a week; HDI, blind vias and controlled impedance add days.
- File completeness: every missing polarity mark or unclear BOM line costs a question-and-answer cycle.
- Test readiness: if the test procedure exists before the boards do, the last day is a day, not a week.
Key facts
- Standard prototype: 10–15 working days from complete files.
- Expedited prototype: 5–8 working days, parts in stock and quick-turn PCB.
- A missing or ambiguous file adds 1–3 days per question cycle.
- Comtec Labs runs prototypes on the same SMT lines as series production, so the prototype is the process qualification.
How to shorten your next prototype
Order the bare PCB and the long-lead components at the same time as the assembly, freeze the BOM before layout is complete, and agree the test procedure with the manufacturer during the DFM review. Comtec Labs reviews every prototype for manufacturability before the first board is built, which removes most of the questions that would otherwise arrive on day three.
Frequently asked questions
Can I get an assembled PCB prototype in one week?
Yes, when the bare board is a standard 2–6 layer build, every component is available from stock and the files are complete. Typical expedited time is 5–8 working days.
What is the longest part of PCB prototype lead time?
Component procurement. Bare PCBs and assembly are predictable; a single allocated part is not.
Does consigned material shorten lead time?
Only if it arrives kitted and labelled. Partial or unlabelled kits usually add time.
Do you build prototypes in Finland?
Yes. Comtec Labs assembles prototypes and series in Vaasa, Finland, on the same production lines.
Ready to reduce PCB surprises?
Comtec Labs offers a full suite of services to streamline your workflow:
PCB design service
PCB prototyping service
PCB component sourcing
PCB component assembly
PCB testing service
PCB repair and modifications
Printed circuit board production
PCB mass production