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  • Surface Mount (SMT)
  • Thru-hole
  • Mixed Technology (SMT/Thru-hole)
  • Single or Double Sided Placement


  • Quickturn (1-5 days)
  • Standard (10 days)
  • Scheduled Deliveries


  • No Minimun Order Quantity
  • First Articles
  • Prototype – Production


  • Passive Down to 01005 Sizes
  • Ball Grid Array (BGA)
  • Quad Flat Package No-Lead (QFN)
  • Quad Flat Package (QFP)
  • Small Chip Package (Pitch of 0.2 mm)


  • Schematic Design
  • PCB Layout
  • Rework Services
  • Wire & Cable Harnesses
  • Box Build
  • DFM Analysis
  • XRAY Inspection
  • Aqueous Cleaning
  • PCB Testing Services



CEN specializes in quickturn prototype and short run printed circuit board assembly.

Our high speed automated machines can handle production orders. No NRE, minimums or contracts

CEN PCBA, Beside PCB Assembly, we also offers box build assembly services.

Customers provide all the parts including the bare PCB and components, CEN assembles teh PCB using our state of the art automated equipment.

Customer “hard to find” parts, the “custom” parts, or the parts you have in inventory, whatever parts you have! We help procure the rest of the parts, the PCBs and Assembly

CEN manageS the whole process from componnets sourcing, PCB manucturing to PCB assembly and testing as your application requires.

File Needed for Your PCB Order

To ensure a smooth and efficient PCB assembly experience, please submit the following files in a single ZIP archive with your order:

1. Comprehensive Gerber Files:

  • Include all necessary layers for accurate PCB fabrication, such as copper, soldermask, silkscreen, solder paste, etc.

2. Precise Centroid File (Pick and Place File):

  • This file, also known as a pick and place file, is crucial for component placement during assembly. It should detail component locations, rotations, and reference designators for a flawless assembly process.

3. Detailed Bill of Materials (BOM) in Excel Format:

  • Your BOM should provide a clear and comprehensive list of all components required for your PCB assembly. Include the following details:
    • Reference Designators: Unique identifiers for each component on the PCB.
    • Quantity: The exact number of each component needed.
    • Manufacturer Part Number: Specific identification for sourcing the components.
    • Part Description: A brief description of each component’s function.
    • Type: Specify component type (SMT, Thru-Hole, Fine-pitch, BGA, etc.) for proper placement.
    • Package Description (Optional): While not mandatory, including the package description (e.g., QFN32, SOIC, 0805) can further enhance assembly accuracy.

By providing this well-organized information, you’ll expedite the PCB assembly process and guarantee a successful outcome.


All Printed Circuit Boards must have fiducial marks.

    • Your PCB length and width must be at least 2 inches (approximately 50mm).
    • If your individual PCB is smaller than this, then please panelize your boards. Our engineering team will be happy to assist if you need help
    • Components should be at least 0.120 inches (3mm) from board edge. If components are closer or overhang the board edge then borders will be required. When components are close to the edge we prefer tab routs with mouse bites instead of V-scored panels


Guideline for Ordering Board Level Components (Parts) Including Overages

  • Extra parts will be required on small builds (1 to 25 boards) to be as follow:
  • 0201 to 0603 size: Minimum extra quantity 25 plus required quantity
  • 0805 to 1206 size: Minimum extra quantity 10 plus required quantity
  • On large size components 1 or 2 extra parts is fine
  • All items must be on a continuous strip or reel
  • For large runs extra parts by percentage is OK
  • Special instructions must be provided if components need special handling such as no clean solder.

Our Streamlined PCB Assembly Process: From Design to Delivery

At CEN PCBA, we take pride in delivering high-quality PCB assemblies with a meticulous and efficient process. Here’s what you can expect:

1. Pre-Production:

  • Our team meticulously reviews your order details and verifies the essential files (BOM, Centroid, Gerber files) for any discrepancies.
  • We program our advanced machines based on the BOM and Centroid data, ensuring accurate component placement even before materials arrive.

2. Material Inspection:

  • Upon receiving all materials, a comprehensive kit audit is conducted. Our team identifies any discrepancies or missing components and promptly addresses any questions you might have.
  • To guarantee a smooth production flow, we require all clarifications before assembly commences.

3. Assembly Begins:

  • If your PCB design requires SMT (Surface Mount Technology) components, these are assembled first using our automated equipment.
  • The very first assembled board undergoes rigorous quality checks to verify correct component placement and polarity.
  • As each board exits the reflow oven, it’s meticulously inspected both visually and with an Automated Optical Inspection (AOI) machine.

4. Advanced Quality Control:

  • Ball Grid Array (BGA) components undergo X-ray inspection for precise placement and to detect potential solder bridges.
  • Following SMT assembly, boards are washed (if applicable) to remove any residual flux.

5. Thru-Hole Components and Final Touches:

  • Thru-hole components are meticulously inserted, either manually or using a selective soldering machine depending on the quantity and board design.
  • Similar to SMT boards, thru-hole boards are washed again (if applicable) for a clean finish.

6. Final Inspection and Shipment:

  • Each PCB assembly undergoes a final quality inspection to ensure it meets all specifications and functions flawlessly.
  • Your completed assemblies and any excess materials are carefully packaged and prepared for shipment.
  • You’ll receive a tracking number via email for real-time shipment monitoring.

Partner with CEB PCBA for a seamless and reliable PCB assembly experience. Contact us today to discuss your project!

PCB Assembly Checklist: Ensure a Smooth and Accurate Build with CEN PCBA

At CEN PCBA, we prioritize a seamless and accurate assembly process for every customer. To optimize your experience and avoid delays, please follow these key guidelines:

1. Accurate Documentation:

  • Essential Files: Every project requires a complete set of documents for error-free assembly. This includes:
    • Bill of Materials (BOM): A comprehensive list of all components with their reference designators. Include a “DO NOT POPULATE” (DNP) column for unpopulated parts.
    • Pick and Place File (Centroid File): This data guides component placement during assembly.
    • Matching Gerber Files: These files accurately represent the PCB’s physical design for fabrication.
  • Footprint Verification: Ensure the components listed in your BOM match their corresponding footprints on the PCB layout.

2. Organized Components:

  • Clear Labeling: For effortless identification, organize your components into individual, labeled bags or trays. Each label should include:
    • Manufacturer Name
    • Manufacturer Part Number
    • All Reference Designators where the component is used
  • Multiple Jobs: Submitting multiple PCB assemblies in one order? Package the parts for each project separately and include distinct BOMs and pick and place files for each.

3. Component Quantities:

  • Extra Parts: To account for potential assembly losses, include some extra parts:
    • 0201 to 0603 Size: Minimum 50 extra parts + required quantity.
    • 0805 to 1206 Size: Minimum 25 extra parts + required quantity.
    • Large Components: 1-2 extra parts.
  • Preferred Packaging: We prefer all SMT (Surface Mount Technology) parts to be supplied on continuous strips or reels. For large production runs, a percentage-based extra parts approach is acceptable.
  • Returns: Any unused parts will be returned with your completed PCB assemblies.

4. Design Updates:

  • Consistency is Key: If you make last-minute design changes, ensure these are reflected in your BOM, pick and place files, and any other relevant documents.

5. Polarity Markings:

  • Clear Direction: For all polarized components (ICs, capacitors, diodes), clearly indicate their proper orientation. This can be done with a dot or “1” marking on pin 1 for ICs, or appropriate markings on capacitors and diodes.

6. Special Instructions:

  • Detailed Explanations: Have specific assembly instructions for your boards? Provide clear descriptions with sketches, photos, PDFs, or drawings to avoid any misunderstandings.

7. Drop Shipping:

  • Clear Labeling: If your components are drop-shipped from suppliers, request them to include the CEN PCBA order number on the package exterior for smooth receiving.

By following these simple guidelines, you’ll ensure a streamlined and successful PCB assembly experience with CEN PCBA. If you have any questions, don’t hesitate to contact us!

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