PCB Services
Low Volume PCB Assembly
Prototype and small-batch assembly from 1 to 500 boards.
Low volume PCB assembly — typically 1 to 500 boards — serves prototype validation, pilot production, pre-series qualification, bridge builds during production ramp-up, and ongoing production of specialized products with modest annual volumes. Low volume assembly requires the same equipment and quality standards as high-volume production but with faster setup, more flexible scheduling and willingness to handle small lot sizes without excessive minimum order requirements. AstroPCB assembles low volume orders with full SMT, through-hole and mixed-technology capability.
When low volume assembly makes sense
Prototype builds (1-10 boards) validate the design before committing to production tooling and high-volume component purchases. Pilot production (10-100 boards) provides units for system integration testing, field trials, regulatory testing (EMC, safety) and customer evaluation. Pre-series qualification (50-200 boards) demonstrates production readiness with full process documentation. Bridge builds cover demand during the transition from prototype approval to volume production line readiness. Ongoing low volume production serves niche products — medical devices, industrial instruments, military equipment — where annual volumes are measured in hundreds, not thousands.
Assembly process
Low volume assembly uses the same pick-and-place machines, reflow ovens, wave soldering equipment and inspection systems as high-volume production. The difference is in scheduling and setup: a low volume order is programmed, kitted and run as a distinct job rather than merged into a continuous production line. Stencil fabrication, machine programming and first-article inspection are performed for each new design. These NRE (non-recurring engineering) costs are a larger percentage of the total cost for small quantities but are necessary to ensure correct assembly.
SMT assembly places components as small as 01005 (0.4 x 0.2 mm) and BGAs with pitch down to 0.4 mm. Through-hole assembly handles connectors, transformers, relays and other components that require mechanical retention. Mixed-technology builds combine SMT and through-hole in the sequence that best protects temperature-sensitive components while ensuring reliable solder joints on all connections.
Testing and inspection
Automated optical inspection (AOI) verifies solder joint quality on every board after reflow. X-ray inspection examines BGA, QFN and other hidden-joint packages where AOI cannot see the solder connection. Functional testing per customer-provided test procedures validates that the assembled board operates correctly. For low volume builds, flying probe electrical test on the bare board before assembly catches fabrication defects before components are mounted — preventing the cost of assembling a defective board.
Turnkey, consigned and partial turnkey
Low volume orders are available as turnkey (AstroPCB sources all components), consigned (customer provides components) or partial turnkey (customer provides selected parts, AstroPCB sources the rest). For prototype builds where speed matters, turnkey with components sourced from Digi-Key and Mouser stock provides the fastest path to assembled boards. For production builds where component cost optimization matters, consigned or partial turnkey gives the customer more control over the BOM cost.
Request a low volume assembly quote
Upload Gerber files, BOM and centroid file. Specify the quantity, turnkey/consigned preference, and any testing requirements. The engineering team will review the BOM and return a quotation.