The part number **0530CDMCCDS-R20MC** refers to a high-current, low-profile power inductor manufactured by **Sumida**. This component is specifically designed for use in DC-DC converters and power supply modules. --- ### 1. Part Number Breakdown Understanding each segment of the code reveals the technical specifications: | Code Segment | Description | Specific Detail | | :--- | :--- | :--- | | **0530** | Case Size | Approx. 5.4mm x 5.2mm (Height: 3.0mm) | | **CDMC** | Series Type | Power Inductor (Molded Construction) | | **CDS** | Construction | Shielded, metal composite core | | **R20** | Inductance Value | 0.20 µH (Microhenries) | | **M** | Tolerance | ±20% | | **C** | Special Code | Specific internal design/material version | --- ### 2. Key Technical Specifications The "CDMC" series is known for its high saturation current and efficiency in small footprints. * **Inductance:** 0.20 µH * **DC Resistance (DCR):** Typically very low (approx. 2.5mΩ - 3.5mΩ) to minimize power loss. * **Saturation Current ($I_{sat}$):** The current at which the inductance drops by a specified percentage (usually 30%). For this part, it is typically between **18A to 25A**. * **Temperature Rise Current ($I_{temp}$):** The current that causes a 40°C temperature rise. * **Operating Temperature:** Generally ranges from **-55°C to +125°C**. --- ### 3. Structural Features The component utilizes **Metal Composite Core** technology, which offers several advantages over traditional ferrite cores: 1. **Magnetic Shielding:** The molded construction naturally shields the component, reducing Electromagnetic Interference (EMI) with surrounding components. 2. **Soft Saturation:** Unlike ferrite inductors that drop inductance sharply when overloaded, metal composite cores have a gradual "soft" saturation curve. 3. **Acoustic Noise Reduction:** The solid molded structure minimizes physical vibrations (buzzing) often found in wire-wound inductors. --- ### 4. Common Applications Due to its high current handling and small size, this inductor is commonly found in: * **Computing:** CPU/GPU Voltage Regulator Modules (VRM). * **Mobile Devices:** High-efficiency smartphones and tablets. * **Automotive:** Infotainment systems and LED lighting drivers. * **Point of Load (POL):** Compact DC-DC converters on motherboards. --- ### 5. Equivalent Replacement Guide If sourcing this specific Sumida part is difficult, common equivalents from other manufacturers include: * **Vishay:** IHLP-2020CZ-01 series. * **Bourns:** SRP5030CA series. * **TDK:** SPM5030 series.