A reliable PCB assembly quotation needs more than a board quantity. Two PCBs with similar dimensions can have different component counts, package types, THT requirements and sourcing scope. A structured technical package helps purchasing and engineering teams compare quotations on the same basis.
BOM: the material list
A useful BOM can include reference designators, manufacturer part number, manufacturer, value, package, quantity and notes about approved alternatives.
Gerber data
Gerber files describe PCB manufacturing layers and geometry. When bare PCB supply is included, additional specifications such as layer count, thickness and surface finish may need separate confirmation.
Pick & Place
The Pick & Place file provides X-Y coordinates and component rotation information. It must match the same board revision as the Gerber and BOM.
Assembly drawing, quantity and sourcing responsibility
Assembly drawings help clarify orientation and mechanical notes. Quantity affects production planning, while the quotation should also state whether components are customer-supplied, supplier-sourced or mixed.
SEMKO can evaluate electronic component supply together with assembly when part numbers and quantities are provided.
Revision, testing and special processes
Keep BOM, Gerber and Pick & Place in one current release. If functional testing, programming, coating, cleaning or special packaging is required, define it during quotation.
You can submit these files using the SEMKO quotation form.
Frequently Asked Questions
What is the most important file for a PCB assembly quotation?+
The BOM is a key document, but Gerber, Pick & Place, quantity and assembly information are also commonly needed.
Are Gerber and Pick & Place the same?+
No. Gerber describes PCB manufacturing geometry, while Pick & Place contains component coordinates and rotation.
Should a BOM contain manufacturer part numbers?+
Whenever possible. MPN information reduces the risk of incorrect component matching.
Can I request a quote if some files are missing?+
Yes. Submit the available files and clarify the missing technical information during review.
Is this relevant to your project?
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