Verified PCB & PCBA manufacturingTHT and mixed technology
Through-Hole PCB Assembly Services
Through-hole PCB assembly for connectors, power parts and mixed-technology boards using selective, wave or controlled hand-solder processes.
What this service solves
A controlled path from requirements to acceptance
Through-hole assembly remains valuable where mechanical strength, connector retention or power handling matters. The correct process depends on layout, component thermal sensitivity and access.
Best fit for
- Industrial control and power electronics
- Boards with connectors, relays or large components
- Mixed SMT and through-hole assemblies
Scope
Typical project deliverables
The exact scope is frozen in the quotation and approved build documentation.
| Deliverable | Control point | Customer output |
|---|---|---|
| 01 · Insertion and polarity instructions | Confirmed before material commitment | Approved assumptions and responsibilities |
| 02 · Wave, selective or hand-solder process selection | Confirmed before material commitment | Approved assumptions and responsibilities |
| 03 · Fixture and keep-out review | Controlled during manufacturing | Repeatable production instruction |
| 04 · Visual inspection criteria | Controlled during manufacturing | Repeatable production instruction |
| 05 · Lead trimming and cleaning scope | Verified before release | Inspection, test or shipment evidence by scope |
| 06 · Mechanical support review | Verified before release | Inspection, test or shipment evidence by scope |
Workflow
How a build moves forward
- 01
Qualification
Confirm product stage, quantities and commercial fit.
- 02
File review
Identify missing data and manufacturability conflicts.
- 03
Quotation
Separate material, fabrication, assembly, test and logistics assumptions.
- 04
Approval
Freeze revisions, alternates and acceptance criteria.
- 05
Build & validation
Manufacture against the approved package and record agreed results.
Risk review
Issues to resolve early
| Risk | Required control |
|---|---|
| Poor hole-to-lead fit | Resolve conflicting inputs in a dated engineering review. |
| Shadowing and thermal imbalance | Record approval ownership and release status before purchase. |
| Insufficient selective-solder access | Define handling, traceability and exception rules in the build package. |
| Manual work without defined workmanship criteria | Select inspection and test coverage against the actual failure risk. |
Buyer questions
Frequently asked questions
Which soldering process is best for THT?
Wave solder suits compatible volume layouts, selective solder provides targeted control, and hand soldering can fit low-volume or inaccessible locations. The board design determines the best choice.
Can SMT and THT be combined?
Yes. Mixed-technology builds require an agreed process sequence and attention to component temperature limits and solder-side clearances.
How is workmanship judged?
Acceptance should reference the customer drawing and an agreed workmanship standard and class, with any special criteria documented before build.
Next step
Ready for a build review?
Share your project stage, quantity and target date. We will confirm the files, process and testing information needed for an accurate quotation.