Emi Filter

Our Power Line Common Mode Filters are engineered to suppress noise on AC and DC power lines, providing stable and reliable EMC performance for modern electronic systems. Compared with traditional power line choke designs, our components deliver improved attenuation, lower leakage inductance, and long-term thermal stability—making them ideal for industrial, consumer, and communication applications that require dependable filtering under continuous operation.

This new product page focuses on one dedicated CMF series from our portfolio, offering more detailed specifications and clearer product positioning than the old website version.

Using optimized ferrite cores and balanced coil construction, these filters effectively suppress high-frequency interference on power lines, ensuring compliance with international EMI standards.

Each filter is designed for stable inductance under varying temperatures and load conditions. This is essential for applications such as Power Line Filters and embedded switching power supplies where consistency is critical.

The series offers multiple footprint options, allowing engineers to integrate the filters into limited PCB space. Designs can also be adapted into SMD Inductor formats for high-density layouts.

By applying toroidal magnetic structures—commonly used in Toroidal Choke designs—the filters achieve:

• Reduced magnetic flux leakage

• Higher inductance per turn

• Excellent repeatability in mass production

Our Common Mode Filters are widely used in:

• Switching power supplies

• Smart meters and home appliances

• LED drivers and lighting control

• Industrial controllers and motor drives

• Telecommunication power modules

These components suppress interference by presenting high impedance to common-mode noise while allowing differential-mode currents to pass through with minimal loss. The result is a cleaner, more stable power line that protects sensitive circuits downstream.

• High common-mode impedance across a wide frequency range

• Low DCR for reduced power loss

• Excellent thermal stability

• High insulation reliability

• Multiple inductance values available

• Suitable for both AC and DC power lines

• AC/DC adapters

• SMPS and onboard power modules

• EV charging equipment

• Household appliances

• Industrial automation systems

• Power communication interfaces