1. Project Background

A European industrial automation customer was developing a three-phase power filter module for industrial equipment. During the transition from prototype validation to production, the customer encountered several challenges, including:

• Insufficient EMI suppression performance during EMC testing
• Long component procurement lead times
• Increasing production costs
• Difficulty maintaining consistent quality during small-batch manufacturing

The customer required a reliable PCB and PCBA manufacturing partner capable of providing not only assembly support but also engineering optimization throughout the production process.

KKPCB supported the project with PCB fabrication, PCBA assembly, DFM analysis, component sourcing assistance, and manufacturing process optimization to improve product reliability and production efficiency.

2. Application Overview

The three-phase three-wire power filter module is designed to reduce electromagnetic interference generated by industrial power systems and improve equipment stability.

Typical applications include:

• Industrial automation equipment
• Motor drive systems
• Inverters and converters
• UPS systems
• Switch-mode power supplies (SMPS)

In these applications, PCB and PCBA performance directly affects:

• EMI suppression capability
• Electrical safety
• Long-term operational reliability
• System compliance with EMC requirements

3. Product Specifications

4. Key Manufacturing Challenges

1. EMI Performance Optimization

The power filter module required stable electromagnetic interference suppression under industrial operating conditions.

Potential risks included:

• Improper grounding structures
• Insufficient EMI shielding effectiveness
• Noise coupling between power sections and sensitive circuits

2. Production Cost Control

The customer needed to reduce manufacturing costs while maintaining reliability.

Main cost drivers included:

• Component sourcing efficiency
• PCB material selection
• Assembly complexity
• Testing requirements

3. Production Consistency and Lead Time

For industrial applications, stable delivery and consistent quality are critical.

The customer required:

• Shorter production cycles
• Reliable component availability
• Repeatable PCBA quality

5. KKPCB Engineering and Manufacturing Solutions

PCB Structure Optimization

KKPCB reviewed the PCB design and recommended a suitable multilayer structure using high-TG FR4 materials.

Optimization included:

• Improved layer stack-up configuration
• Enhanced power distribution paths
• Better EMI control through optimized grounding design

This helped improve electrical stability while maintaining manufacturability.

DFM Analysis and Assembly Optimization

Before production, KKPCB conducted manufacturing reviews focusing on:

• Component placement
• Soldering reliability
• Assembly sequence
• Thermal considerations
• Test accessibility

The DFM process helped identify potential production risks before mass manufacturing.

Component Sourcing and Supply Chain Support

To address long procurement cycles, KKPCB provided component sourcing assistance, including:

• Alternative component evaluation
• Supplier coordination
• BOM optimization support

This reduced supply chain risks and improved production flexibility.

Functional Testing Improvement

KKPCB developed customized testing solutions to improve production quality.

Testing improvements included:

• Dedicated test fixtures
• Electrical performance verification
• Production inspection optimization

This ensured consistent functional performance across production batches.

Reliability Enhancement

For industrial environments involving vibration, humidity, and temperature variation, KKPCB implemented additional protection measures:

• Protective coating for critical components
• Improved packaging methods
• Enhanced handling during shipment

6. Production Results

Through close cooperation between the customer and KKPCB engineering teams, the project achieved measurable improvements:

7. Why KKPCB Was Selected

This project demonstrated KKPCB’s capability in supporting complex PCBA manufacturing requirements through:

One-Stop PCB & PCBA Manufacturing

Integrated support covering:

• PCB fabrication
• PCB assembly
• Component sourcing
• Engineering optimization

Manufacturing-Oriented Engineering Support

Including:

• DFM analysis
• Process improvement
• Reliability optimization
• Production troubleshooting

Flexible Production Capability

KKPCB provided:

• Fast response for urgent projects
• Small-to-medium batch production support
• Customized manufacturing solutions

8. Project Impact

By combining PCB manufacturing expertise with engineering support, KKPCB helped the customer improve:

• Product reliability
• EMI performance
• Manufacturing efficiency
• Supply chain flexibility

The successful production transition also strengthened the customer’s confidence in expanding future cooperation with KKPCB.

Conclusion

For industrial power electronics applications, successful PCBA production requires more than assembly capability. PCB design optimization, EMI control, component management, and manufacturing process reliability all play important roles.

Through engineering-driven PCB/PCBA solutions, KKPCB helps customers transform complex designs into reliable, production-ready products.

From prototype validation to production optimization, KKPCB supports customers with flexible manufacturing and practical engineering solutions.