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The CM Series Common Mode Chokes are independently separated from the legacy product range to support more focused EMI suppression design and calculation-based selection.
This series is suitable for both power line filtering and SMD common mode choke applications, offering engineers greater flexibility during EMC design.
A common mode choke application typically targets the suppression of high-frequency noise that appears simultaneously on multiple conductors.
CM Series chokes are widely applied in:
Power input lines
Signal and data lines
Switching power supplies
Industrial control systems
Communication and embedded electronics
By blocking unwanted common-mode noise while allowing normal current flow, CM chokes form a critical part of any Emi Filter design.
The SMD Common Mode Choke version of the CM Series is designed for space-constrained PCB layouts and automated assembly.
Key benefits include:
Surface-mount compatibility
Stable impedance over wide frequency ranges
Low DC resistance
High consistency for mass production
These characteristics make CM Series SMD chokes ideal for modern electronic designs requiring compact EMI suppression.
A common mode choke operates by placing multiple windings on a shared magnetic core:
Differential-mode currents generate opposing magnetic flux and cancel out
Common-mode noise currents reinforce magnetic flux
Increased impedance attenuates high-frequency interference
This operating principle is fundamental to both Power Line Common Mode Choke and SMD configurations.
| Part Number | Rated Current (A) | Inductance (mH) | Mounting Type | Rated Voltage (V) |
|---|---|---|---|---|
| CM-102 | 0.5 | 1.0 | SMD | 250 |
| CM-203 | 1.0 | 2.0 | SMD | 250 |
| CM-305 | 2.0 | 3.0 | SMD | 300 |
| CM-510 | 5.0 | 5.0 | Through Hole | 480 |
Compared with conventional chokes, CM Series products offer:
Broader application coverage
Flexible mounting options
Improved suitability for compact PCB layouts
Easier integration with Emi Filter networks
This makes CM Series suitable for both SMD Common Mode Choke applications and traditional power line filtering.
Ferrtx provides customization services for CM Series products, including:
Inductance tuning
Current rating adjustment
Mechanical and footprint customization
Application-specific EMI optimization
Custom solutions support advanced common mode choke application requirements across industries.
Application-driven design approach
Support for calculator-based EMI selection
Compact SMD and power line options
Stable quality and supply consistency
The CM Series Common Mode Chokes deliver a practical and flexible solution for engineers designing modern EMI suppression systems.
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