## Overview of CDMC104NP-R36M The **CDMC104NP-R36M** is a high-current, low-profile power inductor manufactured by **Sumida**. It belongs to the CDMC series, which is specifically designed for high-frequency DC-DC converters and power supply modules where space is limited but current demands are high. --- ### 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) | | **DC Resistance (Max)** | 1.55 mΩ | | **Saturation Current ($I_{sat}$)** | 27.0 A | | **Temperature Rise Current ($I_{rms}$)** | 21.0 A | | **Operating Temperature** | -40°C to +125°C | | **Dimensions (LxWxH)** | 10.4 x 10.0 x 4.0 mm | | **Core Material** | Carbonyl Powder (Metal Composite) | --- ### 2. Key Internal & Electronic Features #### A. Metal Composite Construction Unlike traditional ferrite inductors, the CDMC104NP-R36M uses a **metal composite core**. * **Soft Saturation:** The magnetic flux does not drop off abruptly when current increases. This prevents sudden circuit failures during current spikes. * **High Efficiency:** The molded construction minimizes electromagnetic interference (EMI) leakage. #### B. Low DCR (DC Resistance) With a maximum resistance of only **1.55 mΩ**, this part minimizes power loss due to heat ($P = I^2R$). This is critical for mobile devices and high-efficiency power stages. #### C. Shielded Design The component is magnetically shielded. This is essential for dense PCB layouts where the inductor is placed close to sensitive components, as it prevents the magnetic field from interfering with neighboring traces. --- ### 3. Application Use Cases This specific inductor is typically found in the following electronic circuits: * **Voltage Regulator Modules (VRM):** Used in CPU/GPU power delivery. * **DC-DC Converters:** Buck, Boost, and Buck-Boost topologies. * **Battery Powered Devices:** Laptops, tablets, and high-end handheld electronics. * **Automotive Infotainment:** Where high reliability and temperature stability are required. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **CDMC** | Series Name (Molded Power Inductor) | | **104** | Case Size (Approx 10mm x 10mm x 4mm) | | **NP** | Lead-free/Standard packaging | | **R36** | Inductance Value (R36 = 0.36 µH) | | **M** | Tolerance (M = ±20%) |