The **FCC-60M-R** is a high-performance **common mode choke** (EMI filter) manufactured by **NEC/TOKIN** (now under **KEMET**). It is primarily used in power electronics to suppress high-frequency noise and electromagnetic interference (EMI). --- ## 1. Technical Specifications The "FCC-60M-R" designation refers to specific electrical and physical characteristics designed for AC or DC line filtering. | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Common Mode Choke / EMI Filter | | **Rated Current** | 6.0 Amperes (Max) | | **Rated Voltage** | 250V AC / DC | | **Inductance** | ~1.5 mH to 3.0 mH (varies by sub-series) | | **DC Resistance** | Low (typically < 0.05 $\Omega$) | | **Operating Temp** | -25°C to +120°C | | **Mounting Type** | Through-hole (PCB) | --- ## 2. Internal Electronic Structure The device consists of two main electronic components integrated into a single package: 1. **Ferrite Core:** A high-permeability toroidal or rectangular core that provides high impedance to common-mode signals. 2. **Windings:** Two sets of copper windings wrapped in such a way that the magnetic fields generated by the "line" and "neutral" currents cancel out for differential signals but add up for common-mode noise. ### Schematic Representation ```text Line In (1) o---( Coil A )---o Line Out (2) ) ) ) ) <-- Magnetic Core ) ) Neutral In (4) o---( Coil B )---o Neutral Out (3) ``` --- ## 3. Key Functions * **Common Mode Suppression:** It filters out noise that is present on both the phase and neutral lines relative to the ground. * **EMI Compliance:** Helps electronic devices pass FCC (USA) and VDE (Europe) electromagnetic compatibility standards. * **Heat Dissipation:** The "R" in the series often signifies a ruggedized or resin-coated design for better thermal stability and vibration resistance. --- ## 4. Typical Applications The FCC-60M-R is commonly found in the input stage of power supplies: * **Switching Power Supplies (SMPS):** To prevent high-frequency switching noise from feeding back into the AC grid. * **Home Appliances:** Washing machines, air conditioners, and refrigerators. * **Industrial Equipment:** Motor controllers and UPS systems.