Supplier's Category: All PCB Assembly (PCBA): SMT and Through-hole electronics assembly
PCB Assembly (PCBA) populates a bare circuit board with components using SMT (surface-mount) and through-hole processes, turning a fabricated board into a functional electronic assembly. It’s distinct from PCB design and from full box-build integration, covering just the board-population step.
Assembly quality is largely determined by process control at reflow and inspection, not just the pick-and-place equipment on the floor.
- Ask what inspection they run — AOI (automated optical inspection), X-ray for BGAs, or visual only
- Confirm IPC workmanship class (IPC-A-610 Class 2 vs. Class 3) they build to
- Check component sourcing policy, especially during shortages, and whether counterfeit-parts screening is in place
Related terms: SMT assembly, through-hole assembly, reflow soldering, wave soldering, automated optical inspection (AOI), X-ray inspection (BGA), pick-and-place programming, IPC-A-610 workmanship standard, stencil printing, conformal coating
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Where PCBA fits in the build
PCBA sits between bare-board fabrication and final box build — its output is a tested, populated board, not a finished product.
Typical flow
- Bare board fabrication (outside this category) produces the substrate
- PCB Assembly populates and solders components, then functionally tests the board
- Box Build & System Integration installs the board into the final enclosure