Through-Hole Assembly
Arrange through-hole and mixed-technology assembly for connectors, power parts and other leaded components. Send the component list and board drawing to review insertion, soldering and inspection for your build.
Through-hole assembly for the connections your product depends on
Through-hole components use leads inserted into the PCB, and they often appear alongside SMT devices in the same product. Connector housings, heavier parts and high thermal-mass locations can make insertion, access and soldering different from a straightforward surface-mount build.
GlobalWellPCB reviews the leaded parts, hole geometry and component access to choose an appropriate assembly route. Include any mechanical support or retention requirements in your drawing.
Provide the exact parts and dimensions before setup.
Sequence SMT and through-hole work around access and heat limits.
Capture connector seating, supports and lead trimming in the drawing.
Agree visible checks and any electrical tests needed for release.
Choose the work your order needs
Through-hole component assembly
Populate the specified leaded parts, connectors and sockets. Define orientation, seating, lead preparation and any part supports.
Mixed SMT and through-hole boards
Coordinate surface-mount assembly with insertion and soldering operations. Review heat-sensitive parts and which components are installed at each stage.
Targeted soldering and rework
Discuss selective or other suitable local operations where whole-board exposure or access is constrained. The process is chosen around the actual assembly.
How the project moves forward
- 01
Send the board and component data
Include hole information, BOM, drawing and orientation notes.
- 02
Review insertion and soldering access
Check lead fit, underside space, thermal mass and nearby components.
- 03
Approve the assembly sequence
Agree the soldering route, retention, lead trim and inspection scope.
- 04
Receive the populated assemblies
Release the boards after the order-specific inspection and electrical checks.
What to send for a useful quotation
| File or requirement | Details to include |
|---|---|
| PCB fabrication files | Gerber and drill data, board construction and any panel requirements. |
| Component BOM | Exact manufacturer and MPN, quantity, fitted references and approved alternatives. |
| Placement file | CPL / pick-and-place data identifying X/Y, side, rotation and reference designator. |
| Assembly drawing | Polarity, DNP positions, mechanical details and special component instructions. |
| Lead, hole and insertion details | Include exact component drawings, finished-hole sizes, seating and lead-trim notes. |
| Access and heat restrictions | Identify underside components, keep-outs, supports and special thermal requirements. |
Include the quantity, current revision and required delivery date. If a decision is still open, identify it in your message so the review can address it.
Know what will be checked and returned
| Review area | What it covers | What to specify |
|---|---|---|
| Placement and seating | Inspect polarity, insertion height and part support to the drawing. | Define critical connector and mechanical dimensions. |
| Through-hole solder joints | Review accessible joints against the agreed acceptance criteria. | Identify joints requiring particular inspection attention. |
| Electrical connections | Choose continuity or functional checks for the installed interfaces. | Specify loads, mating connectors and test records. |
State any unit or batch identification, packaging and inspection or test records you need with delivery. The quotation confirms the operations and evidence included.
What shapes your quotation
A useful quotation describes the complete deliverable and its supply responsibilities. Include these items in the review so you can compare like-for-like scope.
- Number and type of inserted components and any lead preparation.
- Mixed-technology sequence, soldering access and fixture requirements.
- Mechanical checks, electrical tests and any requested rework or lead trimming.
The delivery plan follows file readiness, approved materials and the requested operations. Share your target date and any items already available to help review the schedule.
Frequently asked questions
Can through-hole and SMT parts be assembled together?
Yes. Provide the complete BOM and both-side views so the combined sequence, access and inspection can be reviewed.
Which soldering method should I specify?
Describe your components and restrictions. Wave, selective or other suitable operations are chosen from the board layout and process needs.
Do you need component mechanical drawings?
Include them for unusual leads, heavy parts, connectors or seating requirements. Lead and hole compatibility must be reviewed with the actual dimensions.
Can the assembly include connector supports?
List supports, adhesive, brackets or retention instructions in the drawing and BOM. Their supply and installation can then be included in the scope review.
Discuss your Through-Hole Assembly requirements
Send the files, quantity and deliverable you need. Add your supply responsibilities, target date and any test or documentation requirements so the review covers the complete order.