Power Line Common Mode Choke TRF

What Is a Power Line Common Mode Choke?

A Common Mode Power Line Choke is a magnetic component wound on a high-permeability Ferrite Core. It filters interference by allowing differential-mode currents to pass while blocking common-mode noise. This makes it highly effective in power supplies, LED drivers, home appliances, EV chargers, and communication equipment.

Our chokes are available in multiple sizes and inductance ranges, enabling easy integration into compact or high-power circuits. For applications requiring a ring-shaped structure, we also provide toroidal choke solutions that meet similar EMC requirements.

Key Features & Advantages

● High Common-Mode Impedance

Designed to deliver strong suppression performance across a broad frequency range, helping devices meet CISPR, FCC, and CE EMC regulations.

● Ferrite Material with Low Loss

The core material is optimized for stability at high temperatures and for low magnetic loss, ensuring consistent filtering performance under long-term operation.

● Ideal for Power Line Noise Filtering

Excellent for switching power supplies, SMPS controllers, AC-DC converters, and inverter-based systems.

● Wide Operating Temperature Range

Suitable for harsh industrial environments that require long-term reliability.

● Compact Structure for PCB Integration

The coil design provides high impedance in a small footprint, saving PCB space in compact power designs.

If you need a surface-mount solution, our SMD Common Mode Chokes offer similar performance in miniaturized packages.

Typical Applications

• AC/DC switching power supplies

• LED lighting equipment

• Household electronics

• EV charging modules

• Industrial control systems

• Communication devices requiring low EMI noise

• Smart meters, IoT gateways, routers, etc.

These chokes are also commonly used alongside Transformer modules in power conversion circuits, helping ensure stable operation and reduced electromagnetic noise.

Why Choose Our We Cmb Common Mode Power Line Choke?

✔ Stable performance across temperature and frequency variations
✔ High reliability through quality ferrite material and precise winding
✔ Supports industry-standard footprints & custom specifications
✔ Designed for low power loss and high safety margins
✔ Suitable for both commercial and industrial EMC designs

Customization Options

We support OEM/ODM customization including:

• Inductance range & impedance tuning

• Ferrite material selection

• Current rating adjustments

• Custom pin configurations

• High-isolation designs for safety-critical systems

Whether you're developing compact consumer devices or large-scale industrial systems, we provide tailored options to match your EMC performance requirements.

Conclusion

Our We Cmb Common Mode Power Line Choke provides a dependable and efficient way to manage EMI noise in modern power circuits. With well-engineered ferrite cores, stable performance, and flexible customization, it is an ideal choice for manufacturers seeking long-term reliability and compliance across global markets.

If you need additional filtering components—such as Toroidal Choke, SMD Common Mode Chokes, or supporting Transformer units—we offer a complete catalog to help you build a clean and stable power system.