The **CMT4-6-R** is a specific type of **Common Mode Choke** (Toroidal Inductor) manufactured by Coiltronics (a brand of Eaton). These components are primarily used in power electronics to suppress electromagnetic interference (EMI) and noise. --- ### 1. Key Technical Specifications The CMT4-6-R is part of the CMT series, designed for high-current applications. | Parameter | Specification | |:---|:---| | **Part Number** | CMT4-6-R | | **Component Type** | Common Mode Choke | | **Inductance (Typical)** | 3.5 mH (per winding) | | **Rated Current (Irms)** | 6.0 Amperes | | **DCR (Max)** | 0.045 Ohms | | **Mounting Type** | Through-Hole (Vertical/Horizontal options) | | **Core Material** | Ferrite | --- ### 2. Functional Characteristics The CMT4-6-R operates based on the principle of magnetic cancellation: * **Common Mode Suppression:** It provides high impedance to signals flowing in the same direction on both lines (noise), while offering minimal impedance to the "differential mode" (the intended power signal). * **Toroidal Design:** The ring-shaped core ensures that the magnetic flux is contained within the core, reducing stray magnetic fields and improving efficiency. * **RoHS Compliant:** The "-R" suffix indicates that the part is compliant with lead-free/RoHS standards. --- ### 3. Applications This part is commonly found in the input/output stages of power supplies where filtering is critical: 1. **Switch Mode Power Supplies (SMPS):** Filters out high-frequency switching noise. 2. **AC-DC Converters:** Acts as an EMI filter at the mains input to prevent noise from leaking back into the power grid. 3. **Industrial Controls:** Protects sensitive electronics from transients on the power line. 4. **Renewable Energy:** Used in solar inverters to maintain signal integrity. --- ### 4. Typical Connection Diagram In a standard circuit, the choke is placed across the Live (L) and Neutral (N) lines. ```text Input (AC/DC) CMT4-6-R Output (Filtered) Line (+) >-------( Winding 1 )-------> Line (+) Neutral (-) >-------( Winding 2 )-------> Neutral (-) ``` ---