Reliable Mixed Technology PCB Assembly Services

Mixed technology PCB assembly combines surface mount technology (SMT) and through-hole technology (THT or DIP) on the same printed circuit board. This is common when a design includes compact SMD components along with connectors, transformers, capacitors, power parts, or mechanical components that need stronger through-hole mounting. FX PCB supports both automated and manual assembly methods for these builds.

Standard SMT assembly focuses mainly on surface mount components placed by automated equipment. Mixed PCB assembly adds through-hole components that require insertion, wave soldering, selective soldering, or manual soldering depending on the design and volume. Because the process involves multiple component styles and soldering requirements, careful sequencing, inspection, and DFM review are important to protect quality and yield.

Mixed SMT and THT assembly is useful when your product needs both high-density electronics and mechanically strong parts. Examples include boards with SMD ICs and passives plus connectors, relays, terminals, large capacitors, high-current components, or user-interface hardware. It is widely used in industrial controls, medical equipment, telecommunications devices, automotive electronics, LED products, and power systems.

FX PCB works with certified facilities and supports IPC-A-610 Class 2/3 assembly expectations, depending on project requirements. Quality controls may include DFM review, solder joint inspection, AOI, X-ray inspection for applicable packages, electrical checks, functional testing, and final inspection. The company also supports RoHS and REACH compliant production for customers selling into regulated global markets.

Yes. FX PCB offers turnkey PCB assembly that can include bare PCB fabrication, component sourcing, mixed SMT and THT assembly, testing, programming, inspection, and final delivery. This helps engineering and purchasing teams avoid coordinating multiple vendors. Replacement or alternative components are suggested when helpful, but customer approval is required before substitutes are used.

Turnaround depends on board complexity, component availability, quantity, test requirements, and whether expedited delivery is needed. FX PCB supports fast-turn prototyping, and boards can be assembled quickly once all parts are available. Standard assembly timelines are often in the 1–2 week range, while urgent projects may qualify for expedited handling with additional charges.

FX PCB provides component sourcing and procurement support through an experienced sourcing team with access to broad supplier channels and over 600k local stock options. When a part is unavailable, the team can suggest equivalent or alternative components to reduce lead time or cost. Any replacement component must be reviewed and approved by the customer before use.

Pricing is calculated individually because mixed assembly cost depends on the number of placement points, SMT and THT component types, soldering method, board complexity, quantity, testing needs, sourcing requirements, and delivery timing. Designs requiring manual assembly, special fixtures, functional testing, or urgent procurement may cost more than simple automated SMT builds.