Despite the dominance of surface-mount technology, through-hole components are irreplaceable in applications that demand mechanical robustness, high current handling, and thermal endurance. Connectors, transformers, large capacitors, relays, and terminal blocks all rely on leads that pass through the PCB and are soldered on the opposite side — creating a physical bond far stronger than adhesive-based SMT attachment.
For products exposed to vibration, temperature cycling, or repeated mechanical stress — think automotive control units, industrial PLCs, and power distribution modules — through-hole assembly is not just a preference; it is an engineering necessity. A dependable through-hole soldering service ensures that these critical connections meet both performance and longevity requirements.
Wave soldering is an automated process in which the assembled PCB travels along a conveyor through a molten solder wave. The solder rises through plated holes, wetting component leads and pads simultaneously to form reliable joints across the entire board in a single pass. This method delivers speed, consistency, and repeatability that manual soldering cannot match at production scale.
A professionally run wave soldering pcb assembly service controls multiple variables — preheat temperature ramp, flux application, solder wave height and temperature, conveyor speed, and nitrogen atmosphere — to minimize defects such as bridging, cold solder, insufficient hole fill, and icicles. The result is uniform solder joint quality across hundreds or thousands of boards.
Farway Electronic operates a dedicated through-hole assembly line at its 2,000-square-metre production facility in LongGang, Shenzhen. The company's DIP plug-in processing line is built around equipment and processes designed for reliability-focused electronic products.
The published process flow runs from component forming and insertion, through wave soldering, lead cutting, repair welding, and board washing, to functional testing — all within a controlled, inspection-driven workflow. This end-to-end approach defines Farway's dip plug-in welding service and ensures that every board meets consistent quality standards before it advances to the next manufacturing stage.
Many modern PCBs combine surface-mount and through-hole components on the same board. Rather than splitting the project across multiple vendors, Farway offers an one-stop smt + dip assembly service that handles both technologies under one roof. SMT placement and reflow soldering are completed first, followed by through-hole insertion and wave soldering — all within the same production facility.
This integrated approach reduces logistics complexity, shortens lead times, and ensures consistent quality standards across both assembly processes. With 2 SMT lines and 2 DIP lines running in parallel, Farway can manage mixed-technology boards from prototype through production without outsourcing critical steps.
Quality is not an afterthought at Farway — it is built into the process from incoming material inspection through final shipment. The company holds four management-system certifications that span its core service areas:
Assembly workmanship follows IPC-A-610 standards for PCBA acceptance, and the company's product certification scope includes UL, RoHS, SGS, and REACH compliance. These certifications make Farway a reliable dip welding oem partner for customers in automotive, medical, industrial, and consumer electronics sectors.
Wave soldering quality depends not only on the soldering process itself but on rigorous inspection at every stage. Farway's testing and inspection capabilities include:
Farway also backs its assemblies with a one-year free-repair commitment for eligible non-external defects arising during standard customer use — a level of post-delivery support that underscores confidence in manufacturing quality.
Wave soldering is one stage in a broader manufacturing chain. Farway's capabilities extend from PCB board production and component sourcing through SMT, DIP, conformal coating, low-pressure injection moulding, PCBA testing, and finished-product box-build assembly. This means a board can move from bare substrate to tested, coated, and fully packaged product — all within a single facility.
For customers who need complete product realization, Farway's finished-product assembly service combines tested PCBA boards with enclosures, wiring harnesses, connectors, and human-machine interfaces. SOP-based production, station self-inspection, QC full inspection, QA and OBA sampling, and barcode traceability ensure that the final product matches customer requirements from component level to shipping package.
Not all through-hole assembly services are created equal. When evaluating a wave soldering partner, consider these practical criteria:
Farway Electronic meets all of these criteria from its Shenzhen facility, having served more than 100 industry customers across more than 20 countries and regions since its establishment in 2018.
Whether you need a prototype build, low-volume pilot run, or ongoing production of mixed-technology boards, Farway Electronic provides the equipment, certifications, and engineering support to deliver reliable through-hole assemblies. Contact the team at sales@farway.hk or call 181 2472 7402 to discuss your BOM, Gerber files, and project requirements — and receive a rapid quotation tailored to your manufacturing needs.
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