The **125CDMCCDS-R36MC** is a high-current, shielded power inductor manufactured by **Sumida**. It belongs to the **CDMC** series, which is characterized by the use of metal carbonyl powder cores to handle high saturation currents in a compact surface-mount package. --- ### 1. Technical Specifications The following table outlines the primary electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.36 µH | | **Tolerance** | ±20% (M) | | **DCR (Direct Current Resistance)** | ~0.90 mΩ (Max) | | **Saturation Current (Isat)** | ~46.0 A | | **Temperature Rise Current (Irms)** | ~31.0 A | | **Operating Temperature** | -55°C to +125°C | | **Case Size (L x W x H)** | Approx. 13.8 x 12.6 x 5.0 mm | --- ### 2. Key Features * **Metal Core Technology:** Uses a metal powder molding method which results in a "soft saturation" characteristic (the inductance drops gradually rather than abruptly as current increases). * **Magnetic Shielding:** The molded construction provides excellent magnetic shielding, reducing Electromagnetic Interference (EMI) with surrounding components. * **Low DCR:** The very low DC resistance minimizes power loss and heat generation, making it highly efficient for high-current applications. * **High Reliability:** Designed to operate in harsh environments with a wide temperature range. --- ### 3. Common Applications This part is typically used in power management circuits where high efficiency and high current handling are required: 1. **Voltage Regulator Modules (VRM):** Used in CPU and GPU power supplies for servers and desktops. 2. **DC/DC Converters:** High-frequency point-of-load (POL) converters. 3. **Automotive Electronics:** Powering infotainment systems or ADAS sensors (if AEC-Q200 qualified versions are selected). 4. **Battery Powered Devices:** High-capacity power banks or portable industrial equipment. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **125:** Indicates the physical size/series (approx. 12mm class). * **CDMC:** Series name (Molded Power Inductor). * **DS:** Specifically refers to the internal construction or material variant. * **R36:** Represents the inductance value (R36 = 0.36 µH). * **M:** Tolerance code (M = ±20%). * **C:** Packaging/Revision code.