Turnkey PCBA Manufacturing & SMT Assembly in China

Kilandu runs four fully automatic Yamaha YS24 and YS12 high-speed SMT lines and three automatic plug-in lines with lead-free wave soldering at our Shenzhen plant, with a monthly placement capacity of roughly 150 million components. Automated optical inspection covers every board, 3D solder paste inspection is carried out before placement, and X-ray is applied where BGA or other hidden joints are present.

What is installed on the floor

• Four Yamaha YS24 and YS12 high-speed mounters, configured for fine-pitch and mixed-technology work.
• GKG-G5 solder paste printing with fine-pitch capability, followed by SITEK 3D SPI.
• Lead-free reflow with recorded profiles per work order.
• Three automatic DIP lines for through-hole and mixed-technology boards.
• AOI on every board, X-ray for hidden joints, and functional test to customer specification.

Why the equipment set matters more than the headline speed

The value of a line is not its theoretical placement rate but the range of designs it can hold in control. Fine-pitch device packages, 0201 passives, tall through-hole connectors and heavy copper power planes all behave differently during reflow, and a factory that only handles one of those will struggle with a mixed-technology board. Having printing, SPI, placement, reflow and inspection in one continuous flow means the process can be adjusted as a whole rather than in isolated steps.

Capacity and lead time

Monthly capacity of roughly 150 million component placements supports both prototype runs and volume production, and because bare board fabrication and assembly sit in the same supply chain, capacity can be planned together. Typical turnkey lead time is 2 to 5 weeks depending on component availability and build complexity, and longer programmes can have capacity reserved in advance. The plant works under IATF 16949:2016, ISO 9001:2015, ISO 13485:2016 and ISO 14001:2015 certified systems, to IPC-A-610 Class 2 and Class 3 acceptance criteria.

Kilandu's team of 150+ people includes more than 20 engineers and quality specialists who have delivered turnkey PCBA for industrial control, EV charging and energy storage, automotive infotainment, medical devices, IoT, instrumentation and smart home projects across Europe, Russia and the Americas.

What that range actually means in practice

Building for several industries at once changes how a factory reads a design. An industrial control board and an automotive infotainment board may use similar packages, but they are judged against different acceptance criteria, different thermal profiles and different traceability requirements. Working across those sectors means the questions that matter tend to get asked early: which standard applies, what the board will be exposed to, and what evidence the customer needs at the end of the build.

Where our customers are

More than 3,000 OEM customers have placed production with Kilandu, predominantly in Europe, Russia and the Americas. Most are industrial electronics, automation and control manufacturers, energy and EV charging companies, medical device developers and IoT product companies - buyers who need an assembly partner that can take a complete bill of materials and return finished boards to a documented standard rather than a board house that only places parts.

What long experience changes about a project

It mostly shows up in the questions asked before production starts. Whether a part has been used before and has an approved equivalent, whether the panelisation suits the equipment, whether the customer's test specification can be automated on a fixture, and whether the acceptance class is consistent with the rest of the design - all of these are cheaper to settle at quotation than after the first build. With 150+ staff, 20+ engineers, four Yamaha SMT lines and three automatic DIP lines in Baoan District, Shenzhen, Kilandu operates as a turnkey EMS partner under IATF 16949:2016, ISO 9001:2015, ISO 13485:2016 and ISO 14001:2015 certified systems.

Every Kilandu order runs through an ISO 9001 quality system with IPC-A-610 Class 2 and Class 3 acceptance criteria. Incoming components are checked against the BOM and the approved vendor list, and each batch ships with traceable inspection records that tie the assembly back to its material lots and process data.

The control points

• Incoming inspection: part number, marking, quantity and date code against the approved vendor list.
• Solder paste printing verified with 3D SPI before any component is placed.
• AOI after reflow on every board, with X-ray for BGA, QFN and other hidden joints.
• Outgoing inspection and functional test to the agreed specification before packing.

Standards behind the system

Kilandu holds IATF 16949:2016 for automotive work alongside ISO 9001:2015, ISO 13485:2016 for medical devices and ISO 14001:2015 for environmental management. Acceptance criteria are drawn from IPC-A-610 at Class 2 or Class 3 as the application requires, with the process side governed by IPC J-STD-001. Materials are lead-free, RoHS and REACH compliant.

Why records matter as much as inspection

Inspection only proves what was true on the day. Records are what allow a question about a specific shipment to be answered months later: which component lots went into the board, which reflow profile was used, what the AOI and test results were, and what rework was performed. Manufacturing under a certified system requires that data to be captured as part of production rather than reconstructed afterwards, and it is what makes a corrective action possible instead of a conversation.

Quality at the equipment level

The controls above run on four Yamaha YS24 and YS12 SMT lines and three automatic DIP lines with roughly 150 million component placements per month, in the factory at Baoan District, Shenzhen. Typical turnkey lead time is 2 to 5 weeks.

Assemblies are validated with automated optical inspection and functional testing on customer-specific test fixtures before packing, and failed units go back through documented rework and retest. RoHS and REACH compliant process records and inspection data are issued with each shipment.

The test stages

• 3D SPI on solder paste, catching volume and alignment errors before placement.
• AOI after reflow, on every board, against a programmed reference.
• X-ray for BGA, QFN and other joints that cannot be seen optically.
• ICT or functional test on fixtures built to the customer's specification.
• In-production firmware loading and checksum verification where the product needs it.

Fixtures and specification

Functional test is only as good as the specification behind it. Where a customer supplies a test procedure, a fixture is designed and built against it, and the pass and fail limits are agreed before the first production run. For programmes where no specification exists, Kilandu can work with the customer to define a basic power-up and functional test that catches the failure modes the build is most exposed to, rather than shipping untested boards.

Rework and retest discipline

A board that fails is not simply repaired and passed. Rework is performed to documented procedures, the reason for the failure is recorded, and the unit goes back through the same test it failed before it is released. Where a failure repeats across a lot, the cause is investigated at process level - stencil, reflow profile, component lot or placement programme - rather than treated as isolated. That is the difference between a test department and a control loop.

Where this runs

Testing is carried out on the same production floor as assembly: four Yamaha YS24 and YS12 SMT lines and three automatic DIP lines in Baoan District, Shenzhen, under IATF 16949:2016, ISO 9001:2015, ISO 13485:2016 and ISO 14001:2015 certified systems, to IPC-A-610 Class 2 and Class 3 acceptance criteria, with typical turnkey lead time of 2 to 5 weeks.

Turnkey sourcing, four SMT lines and three DIP lines under one roof remove the margin stacking of a multi-vendor supply chain. Kilandu shares the BOM cost breakdown, flags long-lead and single-source parts early, and proposes pin-to-pin alternatives so cost can be designed out rather than negotiated down.

Where the cost actually sits

On most PCBA projects the bill of materials dominates the price, and the assembly charge is a smaller share than buyers expect. That means the biggest savings rarely come from squeezing the labour rate. They come from the material list: an obsolete part carrying a broker premium, a single-source connector with no second option, a surface finish that adds cost without adding function, or a panelisation that wastes board area.

What Kilandu does about it

• Open BOM cost breakdown, so the buyer sees component, board and assembly cost separately.
• Long-lead and single-source parts identified at quotation, with proposed pin-to-pin alternatives.
• Panelisation reviewed to improve board utilisation before fabrication is ordered.
• Standard finishes and materials proposed where the application does not require a premium option.
• Quantity breaks shown explicitly, so the cost of a smaller release is visible in advance.

What we do not do

Cost reduction is not achieved by substituting unapproved parts, reducing inspection coverage or moving to a lower acceptance class without the customer's agreement. Every substitution is proposed with a comparison and requires approval, and inspection scope is part of the quotation rather than something that quietly changes. A price that is lower because the build is less controlled is not a saving.

Where the scale comes from

Kilandu (Shenzhen Jintianlei Innovation Technology Co., Ltd.) runs four Yamaha YS24 and YS12 SMT lines and three automatic DIP lines in Baoan District, Shenzhen with roughly 150 million component placements per month, under IATF 16949:2016, ISO 9001:2015, ISO 13485:2016 and ISO 14001:2015 certified systems. Typical turnkey lead time is 2 to 5 weeks.

Kilandu buys from authorised and franchised distributors, so components are traceable and counterfeit risk is controlled. Long-term agreements cover passives, connectors, microcontrollers and power devices, and our Shenzhen location gives fast access to the electronics supply cluster around the factory.

Sourcing channels

Where a part is available through authorised distribution, that is the channel used, because it provides traceability and a manufacturer warranty. For parts that are only obtainable outside authorised channels, the situation is raised with the customer with the risk stated, so the decision to proceed is made knowingly. Incoming material is checked against the BOM and the approved vendor list, and lot records are retained so that any later question about a shipment can be answered from data.

Agreements and inventory

Long-term agreements on high-volume commodity parts and on the microcontrollers and power devices that appear across multiple products stabilise both price and allocation. Where a part is single-sourced or has a history of shortage, buffer stock is held against forecast, and customers running repeat production can have material reserved for their programme so it is not re-allocated to another order.

Handling shortages and obsolescence

Two events cause most supply problems: an unexpected lead-time extension and a manufacturer lifecycle notice. Kilandu tracks both and raises them as early as possible, with a comparison of pin-to-pin or functionally equivalent options and, where a last-time buy is the right answer, a quantity and storage plan agreed in advance. Because the factory sits inside the Shenzhen electronics cluster, replacement sourcing and tooling changes also move faster than they would at a distance.

The resulting capacity

Supply chain management supports roughly 150 million component placements per month across four Yamaha YS24 and YS12 SMT lines and three automatic DIP lines, under IATF 16949:2016, ISO 9001:2015, ISO 13485:2016 and ISO 14001:2015 certified systems, with typical turnkey lead time of 2 to 5 weeks.

Kilandu builds with lead-free wave soldering and RoHS and REACH compliant materials, and operates under Shenzhen's environmental, health and safety regulations. On request we supply material declarations, RoHS and REACH statements and packaging that meets the customer's own environmental commitments.

Environmental practice in production

The factory operates an ISO 14001:2015 certified environmental management system. In day-to-day terms that covers how solder dross, spent cleaning agents, waste laminate and packaging are segregated and disposed of, how energy use on the SMT and DIP lines is monitored, and how any spill or abnormal discharge is handled. Lead-free processes are standard, so the tin-lead exposure of an older assembly line does not arise.

People and safety

Around 150 people work at the Baoan District plant, more than 20 of them engineers and quality specialists. Production roles are covered by safe operating procedures and personal protective equipment appropriate to the process, and quality training is conducted on a regular cycle so that the standard the system specifies is the standard people actually work to.

Transparency with customers

Increasingly, buyers are asked to report on their supply chain rather than only on their own operations. Kilandu supports that by providing the documents the buyer needs to pass on: material declarations, RoHS and REACH statements, and information about the materials and processes used in a specific build. Where a customer's own code of conduct or supplier requirement goes further, it can be reviewed against what the factory actually does rather than agreed in principle.

Certifications held

Kilandu is Shenzhen Jintianlei Innovation Technology Co., Ltd., and holds IATF 16949:2016, ISO 9001:2015, ISO 13485:2016 and ISO 14001:2015. Assembly runs across four Yamaha YS24 and YS12 SMT lines and three automatic DIP lines to IPC-A-610 Class 2 and Class 3 acceptance criteria, with a typical turnkey lead time of 2 to 5 weeks.

Kilandu (Shenzhen Jintianlei Innovation Technology Co., Ltd.) provides round-the-clock online support and long-term technical follow-up after shipment. Questions are answered by the engineering team that built the boards, and traceable QC records are available for every batch that leaves the factory.

What after-sales support covers

• Technical questions on assembly, rework, second-source approval and process limits.
• Traceability look-ups for a specific lot, including material and inspection data.
• Investigation of a reported failure, with production records pulled for the affected batch.
• Corrective action agreed and applied, with containment for stock already produced.

How a problem is handled

A reported issue is acknowledged quickly and assigned a named technical contact. Production records for the affected lot are retrieved - component lots, reflow profile, AOI and X-ray results, test data - and the board and the reported failure are examined together with the customer rather than in isolation. Where the cause is in assembly or material, containment is applied to any remaining stock and the process is corrected. Where the cause is in design or application, the analysis is still shared, because a finding the customer can act on is worth more than a clean conclusion.

Why the records make this possible

Support is only as strong as the traceability behind it. Every Kilandu build carries lot-level records from component sourcing through SMT placement, DIP, inspection and test, which is why a question about a shipment from months earlier can be answered with data. The factory operates under IATF 16949:2016, ISO 9001:2015, ISO 13485:2016 and ISO 14001:2015 certified systems, which require documented corrective and preventive action rather than informal resolution, and works to IPC-A-610 Class 2 and Class 3 acceptance criteria.

Long-term partnership

Repeat production, second-source qualification, engineering change support and capacity planning for future releases are all part of the relationship after the first shipment. More than 3,000 OEM customers have placed production with Kilandu across Europe, Russia and the Americas, most of them returning for further programmes.