Mid Volume PCB Assembly

Mid Volume PCB Assembly

Mid volume PCB assembly has been one of the core capabilities of Sierra Assembly, since 1982. We are equipped to handle mid volume PCB assemblies that cover orders up to 6000 units.  

Mid Volume PCB Assembly

At Sierra Assembly, we provide expert mid volume PCB assembly solutions designed for businesses in the United States that require precision, efficiency, and reliability. Our experienced team handles orders ranging from hundreds to several thousand units, ensuring every board meets strict quality standards.

Our mid volume PCB assembly services combine fast turnaround times with cost-effective production, making us a trusted partner for U.S. companies in medical, automotive, defense, and electronics industries. As a leading mid volume PCB manufacturer, Sierra Assembly delivers turnkey solutions that simplify your production process while maintaining flexibility and performance.

What is Mid Volume PCB Assembly and Why It’s Important

Mid volume PCB assembly refers to the production of printed circuit boards in moderate quantities typically 500 to 6,000 units per order. This range bridges the gap between low-volume prototypes and high-volume manufacturing.

Why Businesses Choose Mid Volume PCB Assembly

  • Ideal for testing products before scaling up production
  • Cost-effective for limited runs without sacrificing quality
  • Flexible to accommodate design changes or updates
  • Faster production turnaround than large-volume runs

By leveraging our mid volume PCB assembly services, Sierra Assembly ensures your project is delivered on time, meets your specifications, and remains cost-efficient.

Difference Between Low, Mid, and High-Volume PCB Assembly

Sierra Assembly excels at mid volume PCB assembly, providing the perfect balance between affordability, flexibility, and high-quality output.

Feature Low Volume Mid Volume High Volume
Quantity 1–500 units 500–6,000 units 6,000+ units
Cost Optimized for prototypes Balanced cost & quality Higher setup, lower per-unit
Turnaround Very fast Fast and flexible Longer setup
Customization High Moderate to high Limited
Risk Low Moderate High at scale

If you want to learn more about Low-Volume PCB Assembly or High-Volume PCB Assembly, click link.

Our Mid Volume PCB Assembly Process

Sierra Assembly offers turnkey mid volume PCB assembly, managing the entire process from concept to delivery. Our step-by-step approach ensures efficiency, accuracy, and quality.
  1. Design for Manufacturing (DFM): Our engineers optimize your PCB design to reduce errors, improve manufacturability, and lower production costs.
  2. Component Sourcing: We source high-quality components from trusted suppliers, ensuring availability and reliability.
  3. PCB Fabrication: Boards are produced using advanced substrates like FR-4, high-TG laminates, and specialized materials tailored to your application.
  4. Assembly: Our team handles SMT, through-hole, and mixed-technology assemblies with precision, using automated lines and skilled technicians.
  5. Testing & Quality Assurance: Boards undergo rigorous inspections, functional tests, and simulations to meet strict industry standards.
  6. Delivery: Assembled PCBs are packaged and shipped on schedule, ready for immediate use.
If you have any questions about our Mid Volume PCB Assembly process, contact us anytime we’re happy to help

Materials We Use for Mid Volume PCB Assembly

Choosing the right materials ensures reliability, longevity, and performance. At Sierra Assembly, we use only the highest-quality materials to support our mid volume PCB assembly services.
Material Description Typical Application
FR-4 Standard epoxy fiberglass Consumer electronics, general
applications
High-TG Laminates High-temperature resistant Automotive, medical, industrial
Specialty Substrates Flexible, rigid-flex, or high-
frequency
Aerospace, defense
Lead-free Solder RoHS-compliant Environmentally safe assembly
Standard & Heavy
Copper
Supports high current and complex
circuits
Power electronics, industrial equipment

Advantages of Choosing Sierra Assembly for Mid Volume PCB Assembly

Partnering with a reliable mid volume PCB assembly company ensures you receive boards that meet both technical and business needs.
  1. Cost-Efficient Production: Reduced per-unit costs compared to low-volume prototypes
  2. Faster Turnaround:  Efficient processes allow quicker delivery
  3. Customizable Solutions:  Flexibility for design updates and varied order sizes
  4. High-Quality Standards: Advanced testing and inspections ensure consistent performance
  5. Turnkey Capabilities: End-to-end mid volume PCB assembly services simplify project management
Advantage Benefit
Quantity Flexibility Supports 500–6,000 units per order
Turnkey Services Complete solution from fabrication to delivery
Quality Assurance AOI, X-ray, ICT, and functional testing
RoHS Compliance Lead-free and environmentally responsible assembly

Testing & Quality Assurance

At Sierra Assembly, our mid-volume PCB assembly services include comprehensive testing to ensure every board meets stringent quality standards. Each assembly undergoes multiple verification steps to guarantee reliability, performance, and long-term functionality.
  • Automated Optical Inspection (AOI): Detects surface defects, misaligned components, soldering issues, and missing parts. This early-stage inspection ensures every board is visually accurate and ready for assembly.
  • X-ray Inspection: Verifies hidden solder joints and Ball Grid Arrays (BGAs), which is critical for high-density or complex PCB assemblies where issues cannot be seen with the naked eye.
  • In-Circuit Testing (ICT): Confirms the electrical connectivity of every component on the board, helping detect shorts, opens, or incorrect component values before shipment.
  • Functional Testing: Simulates real-world operating conditions to ensure the complete board performs as intended, giving you confidence in its integration and long-term reliability.
Every board leaving Sierra Assembly is thoroughly inspected and tested, combining automated and manual verification methods. This approach ensures your assemblies are high-quality, dependable, and ready for real-world applications.

If you want to learn more about our complete PCB inspection and testing process, explore our Testing & Inspection services

Challenges in Mid Volume PCB Assembly and How We Solve Them

Even mid-volume production can face unique challenges. At Sierra Assembly, we anticipate these issues and provide solutions:
Challenge Impact / Risk Sierra Assembly Solution
Component Shortages Delays production and may require substitute parts Procurement team sources components from multiple trusted suppliers to ensure timely assembly
Maintaining Consistent Quality Defective boards can affect performance and reliability Advanced inspection technologies including AOI, X-ray, and functional testing prevent defects
Design Adjustments Mid-Production Mid-production changes can cause delays or errors Flexible processes and DFM (Design for Manufacturability) reviews allow modifications without impacting schedules
Cost Management Unexpected costs may arise due to materials or complexity Optimizing board layout, layer count, and material selection keeps costs predictable while maintaining quality

Industries That Use Mid Volume PCB Assembly

Sierra Assembly serves a wide range of industries with our mid volume PCB assembly services, delivering reliability and precision in every project:

  • Medical Devices: Diagnostic equipment and monitoring systems
  • Automotive Electronics: Infotainment and control units
  • Defense & Aerospace: Secure and rugged electronics
  • Marine & Industrial: Navigation and automation systems
  • Consumer Electronics & IoT: Smart devices and connectivity products
All production is conducted in ESD-controlled and climate-stable environments to guarantee high-quality output.

Turnkey Mid Volume PCB Assembly

As a trusted mid-volume PCB manufacturer, Sierra Assembly provides comprehensive turnkey PCB assembly services, managing the entire production process from start to finish. Our services include component sourcing and procurement, PCB fabrication and assembly, rigorous testing and functional verification, and on-time delivery. By handling every stage of production, we reduce risk, simplify logistics, and allow clients to focus on product development and innovation rather than the complexities of supply chain management. This turnkey approach ensures high-quality, reliable PCB assemblies delivered efficiently and on schedule.

Why Choose Sierra Assembly

When it comes to mid-volume PCB assembly, Sierra Assembly is the partner you can rely on. As a leading mid-volume PCB assembly company, we combine precision, reliability, and efficiency in every board. Our services are supported by ISO 9001:2015 and AS9100D certifications, reflecting our commitment to the highest industry standards. We offer fast turnaround times with scalable production, flexibility for design updates and customization, and complete turnkey mid-volume PCB assembly solutions. Whether you are launching a pilot program, scaling a product, or testing market demand, Sierra Assembly delivers consistent quality, reliability, and peace of mind for every project.
 
Ready to simplify your mid-volume PCB assembly? Contact Sierra Assembly today to discuss your project, request a quote, and let our experts manage the entire process from design and sourcing to assembly and on-time delivery.

PCB Assembly Quote Calculator

Use our onlinePCB assembly cost calculator and quote PCB assembly online as per your specifications. Save your time with our PCB Assembly instant Online Quote. 


Calculate Now

Download our brochure to know more about capabilities.

Custom Quotes

If you find that your project doesn’t fit within our online configurator, fill out the form with your specific needs , upload files and we will create a customized quote for you.

Custom Quote

Testimonials