When electronics OEMs and product designers plan a new build, through-hole assembly is often on the bill of materials alongside surface-mount technology. DIP soldering — sometimes called dip plug-in welding service china — remains indispensable for connectors, transformers, large capacitors, and other components that demand mechanical strength beyond what SMT alone can deliver. Yet one of the most common questions procurement teams ask is how pricing for this process actually works when sourcing from a Chinese contract manufacturer. This guide breaks down the key cost drivers, the typical process flow, and what to look for in a reliable quotation so you can compare apples to apples.
DIP (Dual In-line Package) plug-in welding is a through-hole assembly process in which leaded components are inserted into drilled holes on a printed circuit board and then joined to the copper pads using molten solder. In modern PCBA factories, this is most commonly performed by wave soldering — a method in which the board passes over a continuously flowing wave of liquid solder alloy — though manual soldering at rear-welding stations is used for rework, touch-ups, and low-volume or unusually shaped boards. The process is valued for producing mechanically robust joints that withstand vibration, thermal cycling, and high current loads, which is why it is still widely used in automotive, industrial, and power electronics.
Because through-hole assembly requires component insertion, lead trimming, and often a secondary inspection step, it is more labor-intensive than pure SMT. Understanding this helps explain why a dip soldering price quotation china typically itemizes not just the soldering itself but also plug-in labor, wave soldering setup, washing, and functional testing as separate line items.
No two quotations look exactly alike, but reputable manufacturers build their pricing around a consistent set of variables. Knowing these helps you interpret a quote and avoid hidden costs.
A well-structured quotation should map cleanly onto the actual production process. Farway Electronic, a Shenzhen-based EMS provider, runs a documented DIP line that moves from component forming through final testing. The table below outlines the typical sequence and where cost accrues.
| Step | Activity | Inspection / Control |
|---|---|---|
| 1 | Component forming and pre-insertion preparation | BOM check, lead forming verification |
| 2 | Manual or semi-auto plug-in insertion | Plug-in visual inspection |
| 3 | Wave soldering (Nitto equipment) | Temperature profile, flux density monitoring |
| 4 | Lead cutting and trimming | Lead-length sampling |
| 5 | Rear welding and touch-up (24 stations) | Operator self-check, IPQC sampling |
| 6 | Board washing | Cleanliness visual check |
| 7 | Functional testing (FCT / ICT) | QA full inspection per SOP |
Each of these stages consumes labor, equipment time, and consumables. When you receive a wave soldering service quotation, ask whether all seven steps are included or whether testing and washing are quoted separately — this is where misleadingly low prices often hide gaps.
Many real-world boards combine surface-mount and through-hole components on the same assembly. In these cases, the SMT line runs first, followed by DIP insertion and wave soldering for the through-hole parts. A capable partner offering one-stop smt + dip assembly service can handle both under one roof, which reduces transit between vendors, shortens lead time, and simplifies quality accountability.
Farway operates two SMT lines alongside two DIP plug-in lines and two wave-soldering machines in its LongGang, Shenzhen facility, allowing mixed-technology boards to flow through a single controlled production environment. This integration also means that conformal coating, low-pressure molding, and finished-product assembly can follow immediately — useful when the same board needs environmental protection or box-build packaging.
Price comparisons are meaningless without a quality baseline. A quotation from a factory holding IATF 16949 (automotive), ISO 13485 (medical device), and ISO 9001 certifications reflects a higher level of process control than one from an uncertified workshop. These systems enforce documented procedures, traceability, and corrective-action workflows that protect your end product.
Farway Electronic's DIP line operates under IPC-A-610 assembly standards, with plug-in AOI, FAI first-article inspection, and QA sampling built into the process. The company also offers a one-year free-repair commitment for eligible non-external defects arising during standard customer use — a guarantee worth weighing alongside the quoted unit price.
To get a meaningful quote back quickly, prepare the following before contacting a manufacturer:
With these details in hand, a capable dip plug-in assembly partner can typically return a structured quotation within 24 to 48 hours, including a clear breakdown of processing cost, tooling, testing, and material.
Farway Electronic Co., Limited provides through-hole and wave soldering services from a 2,000-square-metre facility in LongGang, Shenzhen — backed by IATF 16949, ISO 13485, and ISO 9001 certifications. Whether you need prototype quantities or mass production, send your BOM and Gerber files to sales@farway.hk or visit the DIP plug-in welding service page to request a detailed, no-obligation quotation.
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