Headers, sockets and cable interface parts.
THT / DIP Assembly Services
Through-Hole and DIP Assembly Services
DQX supports through-hole and DIP assembly for PCBA projects that require stronger mechanical connections, larger components, connectors, terminals and mixed assembly support.
- Through-hole assembly for larger components and connectors
- Mixed SMT + THT workflow support
- Inspection support for polarity, alignment and solder joints
Through-hole assembly for durable electronicsTHT support for connectors, terminal blocks, power components and mixed-technology PCBAs.
THTStrong connection
DIPLarger parts
Durable Connection Support
Built for Components That Need Strength, Stability and Reliable Connection
Through-hole assembly is commonly used for connectors, terminal blocks, switches, relays, transformers, electrolytic capacitors and power-related components that need stronger mechanical support than standard surface-mount parts.
DQX can coordinate THT assembly as a focused process or as part of a mixed SMT + THT PCBA build, with attention to insertion direction, polarity, solder joint condition and final inspection before delivery.
Connection points for industrial and power boards.
Electromechanical parts requiring stable placement.
Larger magnetic components for power applications.
Inductors, capacitors, fuses and high-load components.
SMT first, followed by through-hole assembly when needed.
THT Capabilities
Through-Hole Assembly Support for Practical PCBA Builds
From manual insertion to mixed-technology production support, DQX focuses on clear component requirements and reliable soldering results.
Manual Through-Hole Insertion
Manual insertion support for components that cannot be handled as standard SMT parts.
- Component orientation review
- Lead forming when required
- Mixed assembly coordination
DIP Component Assembly
Assembly support for DIP packages, sockets and components used in industrial or control boards.
- DIP packages
- IC sockets
- Position and polarity checks
Connector and Terminal Assembly
Support for connectors, terminal blocks, headers and interface components used in power and control applications.
- Terminal blocks
- Pin headers
- Cable interface connectors
Mixed SMT + THT Assembly
Coordination of SMT and through-hole assembly sequence for boards using both component types.
- SMT process first
- THT insertion after SMT
- Final mixed-board inspection
Power Component Assembly
Assembly support for larger power-related parts commonly used in durable electronic products.
- Transformers and inductors
- Electrolytic capacitors
- Fuses and relays
Inspection and Touch-Up Support
Inspection and soldering review to improve through-hole assembly consistency before delivery.
- Solder joint review
- Alignment checks
- Final QC support
Component Focus
Typical Components Used in THT Assembly
Through-hole assembly is often selected when component size, connection strength or mechanical stability matters. The final process depends on component type, board layout, soldering requirements and testing expectations.
ConnectorsTerminal BlocksRelaysTransformersElectrolytic CapacitorsPower InductorsSwitchesFusesLarge IC Sockets
Assembly Process
How DQX Supports THT Assembly Projects
The process is arranged around component requirements, soldering quality and whether the project also needs SMT assembly.
01
Review Requirements
BOM, through-hole component information and board requirements are reviewed.
02
Confirm Component Details
Insertion direction, polarity, height restrictions and component fit are checked.
03
Coordinate Mixed Assembly
If SMT is required, surface-mount assembly is arranged before THT work.
04
Perform THT Assembly
Through-hole insertion and soldering are performed according to project needs.
05
Inspect Solder Joints
Solder joints, alignment and mechanical connection points are reviewed.
06
Test and Deliver
Testing, final QC, packing and delivery are coordinated before shipment.
Quality Control
THT Quality Checks Focused on Fit, Polarity and Mechanical Connection
THT quality depends on more than whether a component is inserted. DQX reviews practical assembly details that can affect durability, soldering condition and final product reliability.
Polarity and OrientationDiodes, electrolytic capacitors, connectors and directional parts are checked based on project requirements.
Component Height and PositionLarge components are reviewed for alignment, fit and practical assembly restrictions.
Solder Joint ConditionThrough-hole solder joints are reviewed for visible assembly issues before final delivery.
Mechanical Connection ReviewConnectors and terminals are checked with attention to stable physical connection points.
Project Scenarios
Common PCBA Builds That Use THT Assembly
THT is often included when boards contain power parts, physical interfaces or larger components that need stronger support.
THT FAQ
Through-Hole Assembly Questions
Common questions about THT assembly, mixed assembly and component requirements.
When is THT assembly needed?
THT assembly is commonly used for larger components, connectors, terminals, relays, transformers and parts that require stronger mechanical support.
Can SMT and THT be combined on one board?
Yes. Many PCBAs require SMT assembly first and THT assembly afterward. DQX can coordinate mixed assembly based on your board design.
Do you support connector and terminal assembly?
Yes. Connector, header and terminal block assembly can be supported when component and layout requirements are provided.
What should I provide for a THT quotation?
A BOM, Gerber files, assembly notes, polarity requirements and any height or mechanical restrictions are helpful for review.
Can final inspection and testing be arranged?
Inspection and testing support can be arranged based on customer requirements and available test procedures.
Mixed Assembly Support
Need Both SMT and THT Assembly in One PCBA Project?
Many boards require both surface-mount and through-hole components. DQX can coordinate mixed assembly workflow to support practical production needs.