Through-Hole PCB Assembly Services
LZJPCB provides controlled through-hole and mixed SMT/THT assembly for leaded connectors, transformers, power devices and other accepted components. Engineering fixes the insertion, soldering, workmanship, inspection, test and traceability requirements before release.
- Since 2006
- 50+ engineers
- 4 production bases
- SMT + THT + Mixed
Through-Hole PCB Assembly Capabilities
THT capability is confirmed from the actual component leads, PCB holes, body sizes, mounting constraints, soldering criteria, inspection, test and quantity. Unsupported automatic-insertion or soldering methods are not assumed.
| Capability area | Required input | RFQ output |
|---|---|---|
| Component types | Connector, transformer, relay, capacitor, power and leaded-part data | Accepted component and handling scope |
| Lead and hole fit | Lead size, finished hole, tolerance and annular-ring data | Manufacturability decision |
| Insertion | Orientation, height, retention and sequence drawing | Released work instruction |
| Soldering | Accepted method and workmanship criteria | Named process and inspection gate |
| Mixed assembly | SMT/THT sequence and thermal restrictions | Controlled combined route |
| Testing | Procedure, fixture, limits and record format | Accepted test responsibility |
| Rework and traceability | Disposition, repeat inspection and lot requirements | Linked production record |
Through-Hole PCB Assembly Applications
Through-hole assembly fits components that need leaded mounting, connector retention, power handling, height or service access. Actual suitability follows the supplied electrical and mechanical design.
Leaded connectors and terminals use controlled hole fit, orientation, retention and solder-joint inspection.
Body height, weight, clearance, mounting and accepted soldering criteria enter the work instruction.
Leaded power devices, copper paths, thermal interfaces and spacing are reviewed with the PCB design.
THT parts combine with SMT devices when the design needs dense electronics plus leaded interfaces or replaceable components.
Through-Hole PCB Assembly Quality Control & Testing
THT quality control checks component identity, polarity, orientation, insertion height, lead and hole fit, solder-joint acceptance, trim, cleanliness, function and traceability.
Part identity, polarity, body direction and approved alternates checked.
Finished-hole, lead, annular-ring and insertion conditions verified.
Height, seating, retention and connector alignment inspected.
Assigned wetting, fill, bridging and visible workmanship criteria checked.
Protrusion, clearance, damage and cleanliness reviewed.
Accepted procedure, fixture and limits control execution.
PCB revision, BOM, THT component lot, work instruction, inspection findings, rework and test result remain connected to the production traveler.
- Nonconforming joints isolated
- Rework instruction approved
- Repeat inspection and retest recorded
- Final quantity and records reconciled
IPC-A-610 Through-Hole Workmanship
When IPC-A-610 controls acceptance, the quotation records its revision, class and customer additions. Inspection addresses applicable lead protrusion, wetting, hole fill, bridging, component damage and related workmanship criteria. This is an acceptance basis, not an invented certification.
- Standard and revision identified
- Class and customer clauses recorded
- Conflicts closed before production
Why Choose Us as Your Through-Hole PCB Assembly Manufacturer
Evaluate a THT supplier through component and hole-fit review, controlled insertion and soldering, mixed-technology coordination, workmanship inspection, rework, testing and traceability.
Through-hole value is proven by how connector, transformer and power-device requirements move from component fit to soldering control and accepted workmanship evidence.
Through-Hole PCB Assembly Case Studies
A publishable THT case must identify the actual board, component mix, soldering route, inspection, test, rework challenge and authorized result. This page does not fabricate those details.
The approved case links connectors, transformers, power or other leaded parts to the controlled assembly route, verification evidence and closed production result.
PCB construction, connectors, large parts and leaded devices.
Insertion, retention, accepted soldering method and trim.
Workmanship criteria, functional limits and traceability.
Approved rework or process action and authorized outcome.
Through-Hole vs SMT PCB Assembly
Choose the assembly method from package structure, board density, mechanical load, thermal and electrical requirements, automation, service access and cost. Mixed technology is the correct route when both component styles are necessary.
Through-Hole PCB Assembly
Choose through-hole when plated-hole leads, connector loading, large component bodies, power devices or service access define the assembly route.
SMT PCB Assembly
Choose SMT when compact packages, higher board density and repeatable automated paste and placement are the dominant production requirements.
Get a Through-Hole PCB Assembly Quote
Send the board and leaded-component package. Engineering returns the accepted insertion and soldering route, workmanship criteria, inspection and test scope, price and fixed ship date.
A complete THT RFQ closes component, hole, orientation, soldering, verification and schedule decisions before pricing.
- Gerber or ODB++ and fabrication drawing
- BOM and dedicated THT component list
- Assembly drawing, orientation and height requirements
- Lead, hole, retention and soldering criteria
- Quantity and sourcing responsibility
- Inspection, test and target schedule
Frequently Asked Questions About Through-Hole PCB Assembly
These answers define THT and show when leaded assembly or mixed technology fits the component and mechanical requirements.
What Is Through-Hole PCB Assembly?
Through-hole PCB assembly inserts component leads through plated PCB holes and solders them on the opposite side. THT is the common abbreviation for Through-Hole Technology.
When Should You Choose Through-Hole Assembly Instead of SMT?
Choose through-hole for components whose leads, connectors, mechanical loading, body size, power handling or service requirements match a plated-hole design. Choose SMT for compact, high-density packages and automated placement. Use mixed technology when the assembly requires both.
Send the PCB files, BOM, THT list, drawings, quantity, workmanship criteria and test requirements.