The part number **0618CDMCCDS-R15MC** refers to a high-current, low-profile **Power Inductor** manufactured by **Sumida**. These components are specifically designed for high-density power supply circuits, such as DC-DC converters in laptops, servers, and automotive electronics. ### 1. Part Number Breakdown Understanding each segment of the code reveals the technical specifications of the inductor: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **0618** | Case Size | Approx. 6.6mm x 7.3mm (Footprint) x 1.8mm (Height) | | **CDMC** | Series | Metal Compound Molding (High current/low noise) | | **CDS** | Construction | Shielded construction to reduce EMI | | **R15** | Inductance | **0.15 µH** (R denotes decimal point) | | **M** | Tolerance | ±20% | | **C** | Packaging/Type | Automotive Grade / Standard configuration | --- ### 2. Key Technical Specifications Based on the **CDMC series** architecture, here are the general characteristics of the R15 (0.15µH) variant: * **Inductance:** 0.15 µH * **DC Resistance (DCR):** Extremely low (typically < 2.0 mΩ), which minimizes power loss. * **Saturation Current (Isat):** Very high (often > 25A), meaning the inductance doesn't drop significantly under heavy loads. * **Temperature Rise Current (Irms):** High current handling capability due to the metal powder core. * **Core Material:** Carbonyl iron powder (magnetic metal powder), providing "soft saturation" characteristics. --- ### 3. Core Features and Benefits * **Magnetic Shielding:** The molded construction naturally shields the component, reducing electromagnetic interference (EMI) with surrounding components. * **Compact Low Profile:** At only 1.8mm height, it fits into slim electronic devices. * **High Efficiency:** The low DCR ensures that very little energy is wasted as heat, crucial for battery-operated devices. * **Soft Saturation:** Unlike ferrite inductors that lose inductance sharply when overloaded, this metal composite core loses inductance gradually. --- ### 4. Typical Applications This specific inductor is commonly found in: 1. **Voltage Regulator Modules (VRM):** For CPU and GPU power delivery. 2. **DC-DC Converters:** Point-of-Load (POL) converters in telecommunications. 3. **Automotive Electronics:** Infotainment systems and ADAS sensors. 4. **Mobile Computing:** Power rails in high-end laptops and tablets.