The part number **7M7N-R** typically refers to a specific series of **Surface Mount Device (SMD) Power Inductors**, often manufactured by companies like **Coilmaster Electronics** or similar specialist magnetic component producers. --- ### 1. General Specifications The 7M7N-R series is designed for high-efficiency power conversion. Below is a breakdown of its typical technical characteristics: | Property | Description | | :--- | :--- | | **Component Type** | Shielded Power Inductor | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Core Material** | Ferrite | | **Shielding** | Magnetically Shielded (reduces EMI) | | **Operating Temp** | -40°C to +125°C (standard range) | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Nomenclature Breakdown While specific manufacturers vary slightly, the part number usually follows this logic: * **7M**: Refers to the series type (Metal composite or Ferrite core construction). * **7N**: Generally indicates the physical dimensions (e.g., approx. 7.0mm x 7.0mm footprint). * **-R**: Indicates **RoHS compliance** (Lead-free) or **Tape & Reel** packaging. --- ### 3. Key Applications These parts are commonly found in circuits requiring stable DC-to-DC conversion and noise filtering. * **DC/DC Converters:** Used in Buck, Boost, and Buck-Boost topologies. * **Consumer Electronics:** Laptops, tablets, and gaming consoles where space is limited. * **Power Supplies:** Low-profile power modules. * **Communication Equipment:** Servers and networking hardware. --- ### 4. Technical Advantages 1. **High Saturation Current:** The construction allows the inductor to handle high peak currents without the inductance dropping significantly. 2. **Low DCR (DC Resistance):** This minimizes power loss in the form of heat, increasing the overall efficiency of the device. 3. **EMI Suppression:** Because it is magnetically shielded, it minimizes interference with surrounding sensitive components on the PCB. --- ### 5. Example Footprint Diagram ```text [ 7.0 mm ] +--------------+ ^ | | | | 7M7N | 7.0 mm | | | +--------------+ v (Side View) +--------------+ ^ |[Core/Shield]| 3.0~5.0 mm (Height varies by sub-model) +--------------+ v ```