The **M8CD-5666-R** is a specific surface-mount power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the **M8CD series**, which is designed for high-density, high-efficiency power conversion applications. --- ### 1. General Specifications Below are the typical technical parameters for this specific part number: | Parameter | Value / Description | | :--- | :--- | | **Component Type** | Shielded Power Inductor | | **Inductance** | 6.6 µH (Nominal) | | **Current Rating (Irms)** | Approximately 5.5A - 6.5A (Typical) | | **Saturation Current (Isat)** | High saturation capability | | **DC Resistance (DCR)** | Low DCR for minimized power loss | | **Shielding** | Magnetically Shielded (Low EMI) | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Key Electronic Features * **Magnetic Shielding:** The "CD" in the series often refers to a shielded construction. This prevents magnetic flux from escaping the component, reducing Electromagnetic Interference (EMI) with neighboring sensitive components on the PCB. * **Low Core Loss:** Constructed using materials (often ferrite) designed to maintain high efficiency even at high switching frequencies. * **Thermal Stability:** Designed to operate in high-temperature environments, typically found in automotive or industrial power supplies. * **High Power Density:** The "M8" footprint is engineered to provide a high current-carrying capacity within a relatively small physical volume. --- ### 3. Common Applications The M8CD-5666-R is typically found in the following electronic circuits: 1. **DC-DC Converters:** Used as the energy storage element in Buck (Step-down) or Boost (Step-up) regulators. 2. **Voltage Regulator Modules (VRMs):** Found in computing and server motherboards. 3. **Industrial Electronics:** Distributed power systems and battery-powered equipment. 4. **LED Drivers:** Providing stable current for high-brightness LED arrays. --- ### 4. Part Number Breakdown (Example) While Eaton's naming conventions can be specific, the code generally follows this logic: * **M8CD:** The series designation (Mechanical size and shielding type). * **5666:** Typically represents the inductance value or a specific design code (In this case, mapping to a 6.6µH variant). * **-R:** Indicates compliance with **RoHS** standards (Lead-free).