The part number **0415CDMCCDS-R22MC** refers to a high-current, low-profile power inductor, typically manufactured by **Sumida**. These components are widely used in DC-DC converters for laptops, servers, and automotive electronics due to their compact size and efficiency. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the physical and electrical characteristics: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **0415** | Case Size | Approx. 4.0 x 4.0 mm base, 1.5 mm height | | **CDMC** | Series Type | Molded Power Inductor (Metal powder core) | | **CDS** | Construction | Shielded construction for low EMI | | **R22** | Inductance Value | **0.22 µH** (Microhenries) | | **M** | Tolerance | ±20% | | **C** | Packaging/Type | Typically indicates Tape & Reel packaging | --- ### 2. Key Technical Specifications Based on the standard data for the 0415CDMC series, here are the estimated performance parameters: * **Inductance:** 0.22 µH * **DC Resistance (DCR):** Extremely low (typically between 3.5mΩ to 6.0mΩ) to minimize power loss. * **Saturation Current (Isat):** The current at which inductance drops by ~30%. For this size/value, it is usually between **12A and 18A**. * **Temperature Rise Current (Irms):** The current that causes a 40°C rise in temperature, typically around **9A to 12A**. * **Operating Temperature:** Generally -40°C to +125°C. --- ### 3. Core Features and Benefits * **Metal Composite Core:** Unlike traditional ferrite inductors, these use a metal powder molding technology. This allows for a **"soft saturation"** characteristic, meaning the inductance doesn't drop off instantly when current limits are exceeded. * **Magnetic Shielding:** The molded structure naturally shields the component, reducing Electromagnetic Interference (EMI) with neighboring components on the PCB. * **Low Profile:** The 1.5mm height makes it ideal for ultra-thin electronic devices. * **High Efficiency:** Low DCR ensures minimal energy is wasted as heat, which is critical for battery-powered devices. --- ### 4. Common Applications Due to the low inductance (0.22 µH) and high current capability, this part is used in high-frequency switching environments: 1. **Voltage Regulator Modules (VRMs):** For CPUs and GPUs. 2. **Point of Load (POL) Converters:** Converting main power rails to lower voltages for chips. 3. **Smartphones/Tablets:** In the power management integrated circuit (PMIC) section. 4. **SSD Power Supplies:** Providing stable current in small form factor drives.