Mixed technology PCB assembly is widely used in industrial electronics, automotive control systems, medical equipment, power electronics, communication devices, and consumer electronics. Unlike SMT-only assembly, mixed technology PCBA combines Surface Mount Technology (SMT) and Dual In-line Package (DIP) or other through-hole assembly processes on the same printed circuit board.
This approach allows manufacturers to integrate compact surface-mount components with larger connectors, power devices, transformers, relays, and other components that require stronger mechanical connections or specialized electrical performance.
However, combining multiple assembly technologies also increases manufacturing complexity. SMT placement, reflow soldering, through-hole insertion, wave soldering, selective soldering, inspection, and functional testing all contribute to the final PCBA price.
So, how much does mixed technology PCB assembly cost in 2026?
For OEM buyers, a typical mixed technology PCB assembly project may cost approximately $10–$80 per board for low- to medium-volume production, excluding unusually expensive components and specialized testing. Complex prototypes and high-reliability assemblies can cost significantly more.
This guide explains the major cost components, provides practical USD pricing estimates, compares SMT and DIP assembly expenses, and shares strategies for reducing manufacturing costs without compromising product reliability.
1. What Is Mixed Technology PCB Assembly?
Mixed technology PCB assembly refers to a manufacturing process that combines surface-mount components and through-hole components on one PCB.
SMT components are mounted directly onto the surface of the circuit board, while through-hole components have leads inserted into drilled holes and soldered to copper pads.
Both technologies serve different engineering purposes.
SMT Assembly
Surface Mount Technology is used for components such as:
- Resistors and capacitors
- Integrated circuits (ICs)
- Microcontrollers and processors
- BGA, QFN, and QFP packages
- Small signal transistors and diodes
- Surface-mount connectors
SMT assembly typically involves solder paste printing, component placement, reflow soldering, and automated optical inspection.
Its main advantages include high placement density, automated production, reduced board size, and improved manufacturing efficiency.
DIP and Through-Hole Assembly
DIP assembly generally refers to inserting dual in-line package components into PCB holes. In manufacturing discussions, DIP is also commonly used to describe through-hole insertion and soldering operations more broadly.
Typical through-hole components include:
- Large electrolytic capacitors
- Transformers and inductors
- Power connectors
- Relays and switches
- Terminal blocks
- Large resistors
- Certain power semiconductor devices
Through-hole assembly provides strong mechanical connections and is particularly useful for components exposed to vibration, mechanical stress, or high insertion forces.
Why Do Manufacturers Combine SMT and DIP?
Many electronic products require both compact circuitry and mechanically robust connections.
For example, an industrial power controller may use SMT microcontrollers, resistors, and communication ICs, while large capacitors, transformers, and terminal connectors are installed through-hole.
Combining these technologies provides greater design flexibility and allows engineers to optimize electrical performance, component packaging, and mechanical reliability.
2. Mixed Technology PCB Assembly Cost in 2026
The total cost of mixed technology PCB assembly depends on several factors, including component quantities, PCB specifications, assembly processes, testing requirements, and production volume.
For OEM purchasing decisions, it is important to distinguish between assembly labor costs and the complete turnkey PCBA price.
The following estimates provide a practical 2026 budgeting reference for standard commercial and industrial electronics.
Typical Mixed Technology PCB Assembly Price
| Production Type | Quantity | Estimated Assembly Cost per Board |
| Engineering Prototype | 1–10 pcs | $25–$80 |
| Small Batch | 10–50 pcs | $15–$45 |
| Pilot Production | 50–200 pcs | $8–$30 |
| Medium Volume | 200–1,000 pcs | $5–$20 |
| Mass Production | 1,000–5,000 pcs | $3–$15 |
| High Volume | 5,000+ pcs | $2–$12 |
These figures represent estimated assembly and inspection charges rather than guaranteed turnkey prices. Component costs, bare PCB fabrication, specialized tooling, and shipping may be quoted separately.
Actual prices vary depending on the PCB design, number of placements, through-hole pin count, component availability, and manufacturing location.
Cost Breakdown by Manufacturing Process
A typical mixed technology PCB assembly quotation includes the following items:
| Cost Item | Estimated Price |
| SMT Component Placement | $0.007–$0.03 per placement |
| DIP / Through-Hole Insertion | $0.03–$0.10 per pin |
| Manual Through-Hole Assembly | $0.10–$0.30 per component |
| Reflow Soldering | $0.50–$2.00 per board pass |
| Wave Soldering | $0.30–$1.50 per board |
| Selective Soldering | $1.00–$5.00 per board |
| AOI Inspection | $0.30–$1.00 per board |
| X-Ray Inspection | $3.00–$10.00 per board |
| Functional Testing | $1.00–$10.00 per board |
These are indicative planning ranges. Actual supplier quotations depend on process configuration, production volume, inspection coverage, and labor rates. Some suppliers bundle soldering and inspection into their assembly charges.
For example, a board with 200 SMT placements and 20 through-hole pins may have a different assembly price from a board with the same component count but multiple BGA packages and complex selective soldering requirements.
3. What Factors Affect Mixed Technology PCB Assembly Costs?
Understanding the main cost drivers helps OEM buyers evaluate quotations and identify opportunities for cost reduction.
3.1 SMT Component Count and Placement Complexity
The number of SMT placements is one of the primary factors affecting assembly costs.
Automated pick-and-place machines can install thousands of components per hour under suitable production conditions. However, actual throughput depends on component packaging, feeder changes, placement accuracy, and board complexity.
Several factors can increase SMT assembly costs:
- High component density
- Fine-pitch IC packages
- 0201 and 01005 passive components
- BGA and micro-BGA packages
- Double-sided SMT assembly
- Frequent feeder changes
- Special handling requirements
For example, a PCB with 150 standard SMT placements is generally less expensive to assemble than a board containing 150 placements with multiple fine-pitch BGAs and difficult-to-handle components.
3.2 DIP Component Count and Insertion Difficulty
Through-hole assembly can be more labor-intensive than SMT assembly, especially when components require manual insertion.
The total cost depends on:
- Number of through-hole components
- Total number of solder pins
- Component lead spacing
- PCB hole dimensions
- Component height and weight
- Manual or automatic insertion requirements
- Wave or selective soldering processes
Standard resistors, capacitors, and connectors may be suitable for automated insertion.
However, large transformers, unusual connectors, and irregular components often require manual insertion or additional handling.
When a PCB contains many through-hole connectors, selective soldering or wave soldering may offer better production economics than individual hand soldering.
3.3 PCB Design and Layer Count
Bare PCB fabrication is another important part of the total PCBA cost.
A simple two-layer FR-4 board generally costs less than a complex multilayer PCB with controlled impedance, high-TG materials, heavy copper, or special surface finishes.
Important PCB cost factors include:
- PCB dimensions and thickness
- Number of copper layers
- Copper weight
- Minimum trace width and spacing
- Via density and drilling requirements
- Surface finish, such as HASL or ENIG
- Impedance control requirements
- Special materials and thermal management
For mixed technology boards, engineers should also consider through-hole pad dimensions, annular rings, solder mask clearance, and component spacing.
Good PCB design can reduce both fabrication costs and assembly difficulties.
3.4 Soldering Process Selection
Mixed technology PCBA may require multiple soldering processes.
The selection of soldering technology directly affects production time, equipment requirements, and labor costs.
Reflow Soldering
Reflow soldering is primarily used for SMT components.
Solder paste is printed onto PCB pads, components are placed, and the board passes through a controlled temperature profile to form reliable solder joints.
Factors affecting reflow costs include:
- Number of populated sides
- PCB thermal mass
- Component package types
- Solder paste specifications
- Temperature profile requirements
Wave Soldering
Wave soldering is commonly used for through-hole components.
The PCB passes over a controlled molten solder wave, allowing solder to connect component leads to PCB pads.
It is generally suitable for boards with multiple conventional through-hole components.
However, components located on the opposite side may require special protection or layout adjustments.
Selective Soldering
Selective soldering applies molten solder to specific through-hole joints rather than exposing the entire board to a solder wave.
It is especially useful when a PCB contains both SMT components and through-hole components that cannot safely pass through conventional wave soldering.
Although selective soldering may increase equipment and programming costs, it can reduce soldering defects and protect sensitive components.
3.5 Inspection and Testing Requirements
Inspection and testing are essential for ensuring mixed technology PCBA reliability.
The required testing strategy depends on the application, component packages, operating environment, and customer quality standards.
More advanced inspection requirements increase manufacturing costs but can reduce expensive field failures.
4. SMT vs. DIP Assembly Cost Comparison
SMT and DIP assembly have different cost structures and manufacturing advantages.
| Comparison | SMT Assembly | DIP / Through-Hole Assembly |
| Mounting Method | Surface mounting | Leads inserted into PCB holes |
| Main Equipment | Pick-and-place machines | Insertion and soldering equipment |
| Soldering Method | Reflow soldering | Wave, selective, or hand soldering |
| Production Speed | Generally higher | Depends on insertion and soldering method |
| Labor Requirements | Highly automated | May require additional manual labor |
| Component Density | High | Generally lower |
| Mechanical Strength | Depends on package and pad design | Strong mechanical anchoring |
| Typical Applications | ICs, passives, compact circuits | Connectors, relays, transformers |
For most modern electronic products, SMT provides efficient automated assembly.
However, through-hole technology remains important for power electronics, industrial controllers, and products requiring robust mechanical connections.
Mixed technology assembly combines the advantages of both processes.
5. How Much Does a Mixed Technology PCB Assembly Project Cost? A Practical Example
To understand actual manufacturing expenses, consider a hypothetical industrial control PCB assembly project.
The design uses a four-layer FR-4 PCB with both SMT and through-hole components.
Project Specifications
| Parameter | Specification |
| PCB Type | 4-Layer FR-4 |
| PCB Size | 100 × 80 mm |
| Production Quantity | 100 pcs |
| SMT Components | 120 placements |
| Through-Hole Components | 8 components |
| SMT Technology | Reflow Soldering |
| DIP Technology | Selective Soldering |
| Inspection | AOI + Electrical Testing |
| Assembly Type | Turnkey PCBA |
Estimated Cost Breakdown
| Cost Item | Estimated Unit Cost |
| Bare PCB Fabrication | $2.00–$5.00 |
| Electronic Components | $14.00–$24.00 |
| SMT Placement and Assembly | $1.50–$4.00 |
| Through-Hole Insertion and Soldering | $2.00–$5.00 |
| Stencil and Setup (Allocated) | $1.50–$4.00 |
| AOI and Electrical Testing | $1.50–$4.00 |
| Packaging and Handling | $0.50–$1.50 |
| Estimated Total | $23.00–$47.50 |
The estimated project cost is approximately $2,300–$4,750 for 100 assembled boards, excluding international freight, taxes, and duties.
This is an illustrative budgeting model, not a supplier quotation. Actual costs depend on BOM pricing, sourcing channels, soldering methods, inspection coverage, and production efficiency.
The example also demonstrates an important purchasing principle: assembly labor is only one part of the total PCBA price. Component sourcing and PCB fabrication can account for a substantial portion of the final cost.
6. Testing Methods for Mixed Technology PCB Assembly
Testing is an important part of the mixed technology manufacturing process because defects may occur during component placement, soldering, and electrical integration.
A reliable inspection strategy should cover both SMT and through-hole components.
6.1 Automated Optical Inspection (AOI)
AOI uses cameras and image-processing systems to inspect PCB assembly quality.
It can identify:
- Missing components
- Incorrect component polarity
- Component misalignment
- Solder bridges
- Tombstoning
- Visible soldering defects
- AOI is particularly effective for SMT inspection.
However, conventional AOI cannot fully verify hidden solder joints beneath BGA packages or solder connections inside inaccessible areas.
6.2 X-Ray Inspection
X-ray inspection is useful for examining solder joints that cannot be inspected visually.
Typical applications include:
- BGA solder joints
- QFN packages
- Hidden solder connections
- Voids in solder joints
- Certain complex through-hole connections
For assemblies containing BGA components, X-ray inspection can provide additional information about solder joint integrity.
Its application should be determined by package design, customer requirements, and risk assessment.
6.3 In-Circuit Testing (ICT)
ICT checks individual electronic components and electrical connections using dedicated test points and fixtures.
It can identify:
- Open circuits
- Short circuits
- Incorrect component values
- Certain soldering defects
- Component installation errors
ICT is particularly useful for repeat production because it provides repeatable electrical verification.
However, it requires suitable test-point access and fixture investment.
6.4 Flying Probe Testing
Flying probe testing uses movable probes to contact designated PCB test points.
Unlike traditional ICT, it generally does not require a dedicated bed-of-nails fixture.
It is suitable for:
- Engineering prototypes
- Small production batches
- Low-volume PCBA projects
- Design validation
Although flying probe testing can reduce initial tooling costs, its testing time per board is generally longer than ICT.
6.5 Functional Testing
Functional testing verifies whether the assembled PCB performs according to its intended operating requirements.
Depending on the product, testing may include:
- Power-on verification
- Voltage and current measurement
- Communication interface testing
- Sensor signal verification
- Relay and switch operation
- Motor control verification
- Temperature monitoring
- System-level performance testing
For industrial and automotive electronics, functional testing is especially important because a board may pass basic electrical inspection but still fail under actual operating conditions.
7. How to Reduce Mixed Technology PCB Assembly Costs
OEM buyers can reduce PCBA manufacturing expenses through better engineering decisions and more efficient supplier coordination.
7.1 Optimize SMT and Through-Hole Component Selection
Where electrical and mechanical requirements permit, replacing unnecessary through-hole components with suitable SMT alternatives can reduce manual insertion and soldering work.
However, connectors, power components, and mechanically stressed parts should retain appropriate mounting structures.
The objective is not to eliminate through-hole technology but to use it where it provides measurable engineering benefits.
7.2 Reduce the Number of Unique Components
A PCB with many unique component part numbers may require additional feeder preparation, material handling, and sourcing work.
Standardizing resistor and capacitor package sizes can simplify production planning.
Combining suitable component functions may also reduce the BOM and assembly workload.
7.3 Optimize PCB Layout for Assembly
Design for Manufacturing (DFM) and Design for Assembly (DFA) reviews can identify potential production problems before manufacturing begins.
Important considerations include:
- Maintaining sufficient component spacing
- Providing appropriate fiducial marks
- Optimizing panelization
- Ensuring suitable solder mask clearances
- Designing accessible test points
- Avoiding unnecessary manual soldering
- Providing adequate thermal relief for through-hole pads
A well-designed PCB can improve first-pass yield and reduce rework expenses.
7.4 Select the Appropriate Soldering Method
Wave soldering is often economical for suitable high-volume through-hole assemblies.
Selective soldering is more appropriate when SMT components, connectors, or thermal-sensitive parts restrict conventional wave soldering.
The optimal process depends on PCB layout, component distribution, and production quantity.
7.5 Plan Production Quantities Carefully
Small production batches have higher per-unit setup costs because stencil fabrication, machine programming, and engineering preparation are distributed across fewer boards.
For example, a $200 setup charge represents $20 per board in a 10-piece order but only $0.20 per board in a 1,000-piece order.
When product demand is predictable, consolidating production orders can reduce unit manufacturing expenses.
7.6 Establish a Suitable Testing Strategy
Not every PCB requires every inspection method.
A practical testing plan should match product complexity and reliability requirements.
For example:
- AOI for standard SMT inspection
- X-ray for selected BGA and hidden solder joints
- Flying probe for prototype electrical verification
- ICT for repeat production
- Functional testing for product-specific performance validation
Combining appropriate inspection methods can balance quality assurance and manufacturing costs.
8. How to Choose a Mixed Technology PCB Assembly Manufacturer
Selecting the right PCBA manufacturer is not simply about finding the lowest quotation.
OEM buyers should evaluate manufacturing capabilities, engineering support, quality management, production flexibility, and supply chain reliability.
Manufacturing Capabilities
A qualified supplier should provide integrated SMT and through-hole assembly capabilities.
Important equipment and processes include:
- Automated SMT placement lines
- Precision solder paste printing
- Reflow soldering systems
- DIP insertion capabilities
- Wave and selective soldering
- AOI and X-ray inspection
- ICT and functional testing
Suppliers should also have experience handling different component packages and complex PCB designs.
Engineering and DFM Support
Engineering support is particularly important for mixed technology boards.
Before production, manufacturers should review:
- PCB Gerber files
- Bill of Materials (BOM)
- Component placement files
- Assembly drawings
- Soldering requirements
- Testing specifications
Early engineering reviews can prevent unnecessary manufacturing costs and improve assembly reliability.
Quality Management
OEM buyers should evaluate whether the manufacturer has an established quality management system.
Relevant requirements may include:
- ISO 9001 quality management
- IPC-A-610 assembly acceptance criteria
- J-STD-001 soldering requirements
- Traceability and process documentation
- Incoming material inspection
- First article inspection
- Final electrical testing
For automotive and medical electronics, additional industry-specific quality requirements may apply.
Production Flexibility and Lead Time
A capable mixed technology PCBA supplier should support different production stages, including:
- Engineering prototypes
- Low-volume production
- Pilot manufacturing
- Medium-volume production
- High-volume manufacturing
A supplier that can coordinate PCB fabrication, component sourcing, assembly, inspection, and testing can simplify the overall procurement process.
9. Why Choose KingsunPCB for Mixed Technology PCB Assembly?
KingsunPCB provides PCB manufacturing and assembly solutions for OEM customers across multiple electronics industries.
For projects requiring both SMT and through-hole technologies, engineering coordination is essential to ensure that PCB design, component selection, soldering processes, and testing requirements work together.
Key considerations for mixed technology manufacturing include:
- SMT and DIP assembly process coordination
- PCB fabrication and component sourcing
- Reflow, wave, and selective soldering process selection
- AOI and electrical inspection
- Engineering and DFM support
- Prototype and production batch coordination
With experience in multilayer PCB manufacturing and electronic assembly applications, KingsunPCB supports customers developing industrial control systems, automotive electronics, communication equipment, medical devices, and other specialized electronic products.
OEM buyers can provide their Gerber files, BOM, component placement data, and annual production requirements to obtain a project-specific manufacturing quotation.
10. Frequently Asked Questions About Mixed Technology PCB Assembly Costs
Q1: What is the average cost of mixed technology PCB assembly?
Mixed technology PCB assembly can cost approximately $5–$30 per board for many small- to medium-volume projects, excluding components and bare PCB fabrication where separately quoted.
The actual price depends on SMT placement count, through-hole pin count, soldering methods, production quantity, and testing requirements.
Q2: Is mixed technology PCB assembly more expensive than SMT-only assembly?
Generally, yes. Mixed technology assembly often requires additional insertion, soldering, handling, and inspection processes.
However, the cost difference depends on the number of through-hole components and whether wave or selective soldering can be used efficiently.
Q3: What is the difference between SMT and DIP assembly?
SMT mounts components directly onto PCB surface pads, while DIP and other through-hole processes insert component leads into drilled PCB holes before soldering.
SMT is suitable for compact, high-density electronics, whereas through-hole technology is often selected for connectors, transformers, and mechanically demanding components.
Q4: Which soldering method is best for mixed technology PCB assembly?
There is no single best method for every design.
Reflow soldering is used for SMT components, while wave soldering is suitable for many conventional through-hole assemblies.
Selective soldering is useful when only specific through-hole joints require soldering and nearby SMT components must be protected.
Q5: How can OEM buyers reduce mixed technology PCBA costs?
OEM buyers can reduce costs by optimizing component selection, minimizing unique part numbers, improving PCB panelization, reducing unnecessary manual operations, and selecting appropriate testing methods.
Early DFM reviews can also prevent costly production defects and engineering changes.
Q6: Does mixed technology PCB assembly require X-ray inspection?
Not every mixed technology PCB requires X-ray inspection.
X-ray is particularly useful for BGA and other hidden solder joints that cannot be adequately inspected using conventional optical methods.
The inspection plan should reflect the PCB design, package types, and customer quality requirements.
Q7: What files are required for a mixed technology PCB assembly quotation?
Most manufacturers require:
- Gerber files
- Bill of Materials (BOM)
- Pick-and-place files
- PCB assembly drawings
- Production quantity
- Testing requirements
- Special process specifications
Providing complete and accurate manufacturing data helps suppliers prepare more reliable quotations.
11. Conclusion
Mixed technology PCB assembly combines the advantages of SMT and through-hole manufacturing, making it an effective solution for electronic products that require both compact component integration and reliable mechanical connections.
However, the total manufacturing cost depends on much more than the number of components. SMT placement, DIP insertion, soldering methods, PCB fabrication, component sourcing, inspection, and functional testing all influence the final PCBA price.
For OEM buyers planning production in 2026, understanding these cost factors is essential for evaluating supplier quotations and controlling manufacturing expenses.
Working with an experienced PCB assembly manufacturer can help optimize the assembly process, improve product reliability, and reduce unnecessary production costs.