Bill of Materials(BOM) File for SMT Assembly

Bill of Materials is a list of all the parts that are needed for PCB Assembly, and matches those parts to the Reference Designators in the PCB layout. The BOM should have details with respect to description of the Part(value), reference designator, package, manufacturer’s part number, etc.

The Bill of Materials (BOM) must contain the information below:

  • Comment - Specify the type, specification, tolerance and so on. (e.g. 100nF 80% -20% 50CV)
  • Designator - Mark the location of components on your board. (e.g. R201, R20, C100, U1 )
    (Note: Please don't use case distinction to specify your different components, we will turn all the letters into Capital case when using it for production. If you happen to use to case distinction for different parts, please do correct it)
  • Footprint - The part package. (e.g. 0402, 0805, SSOP-8)

Recommended File Format: .csv, .xls and .xlsx.

Below is a Sample BOM file: 

Download JLCSMT Sample BOM.

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