The **CEP124NP-R35MC-H** is a high-current, surface-mount (SMD) power inductor manufactured by **Sumida**. It belongs to the CEP124 series, which is specifically designed for high-efficiency power conversion applications. ### 1. Technical Specifications The part number defines the electrical characteristics and physical dimensions of the component. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.35 µH | | **Tolerance** | ±20% (M) | | **DC Resistance (DCR)** | ~1.3 mΩ (Max) | | **Saturation Current (Isat)** | ~36.0 A | | **Temperature Rise Current (Irms)** | ~25.0 A | | **Operating Temperature** | -40°C to +105°C | | **Dimensions (L x W x H)** | 13.5 x 12.7 x 4.5 mm | --- ### 2. Key Features and Materials * **Core Material:** Uses a Mn-Zn (Manganese-Zinc) ferrite core, which provides high permeability and low core losses at high frequencies. * **Magnetic Shielding:** The inductor is magnetically shielded, reducing Electromagnetic Interference (EMI) and cross-talk with neighboring components. * **Flat Wire Construction:** Often utilizes flat copper wire to maximize the cross-sectional area, which significantly lowers the DC Resistance (DCR) compared to round wire. * **High Saturation:** Designed to handle high peak currents without the inductance dropping off sharply. --- ### 3. Application Use Cases This specific inductor is ideal for high-power DC-DC converters where space is limited but current requirements are high. 1. **Voltage Regulator Modules (VRMs):** Used in CPU and GPU power supplies on motherboards. 2. **Point of Load (POL) Converters:** Providing stable power to FPGAs and ASICs. 3. **Industrial Power Supplies:** Used in high-efficiency buck/boost converters. 4. **Telecom Equipment:** High-density power modules for networking gear. --- ### 4. Part Number Breakdown The nomenclature typically follows this logic: * **CEP124:** Series name (Indicates the physical size and core type). * **NP:** Standard packaging/termination style. * **R35:** Inductance value (R35 = 0.35 microhenries). * **M:** Tolerance (M = ±20%). * **C-H:** Specific revision or high-temperature/high-current variant coding.