The **MC0420-R22M1** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converters and power management modules. It belongs to the molded power inductor category, known for its compact size and high current handling capabilities. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify its technical physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **MC** | Series Type | Metal Composite (Molded) Inductor | | **0420** | Size Code | Approx. 4.0mm x 4.0mm x 2.0mm | | **R22** | Inductance Value | 0.22 microhenries (µH) | | **M** | Tolerance | ±20% | | **1** | Design Code | Internal revision or specific packaging style | --- ### 2. Key Technical Specifications Below are the typical electrical parameters for this class of component: | Parameter | Value (Typical) | | :--- | :--- | | **Inductance** | 0.22 µH | | **DC Resistance (DCR)** | ~4.0 mΩ to 7.0 mΩ | | **Saturation Current (Isat)** | ~12.0 A to 15.0 A | | **Heating Current (Irms)** | ~9.0 A to 11.0 A | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Material and Construction The "MC" series utilizes **Metal Alloy Powder** technology: * **Molded Construction:** The coil is placed inside a mold and pressed with metallic powder. This results in a shielded structure that minimizes EMI (Electromagnetic Interference). * **Soft Saturation:** Unlike ferrite inductors that lose inductance sharply when current increases, metal composite inductors have a "soft" saturation curve, making them more stable under heavy loads. --- ### 4. Common Applications Due to its low profile and high current capacity, the MC0420-R22M1 is frequently found in: * **Voltage Regulator Modules (VRM):** For CPUs and GPUs in laptops. * **DC-DC Converters:** Point-of-load (POL) power supplies. * **Handheld Devices:** Smartphones and tablets where board space is limited. * **Automotive Electronics:** Infotainment systems and ADAS sensors. --- ### 5. Footprint (Land Pattern) When designing a PCB, the typical dimensions for the 0420 package are: ```markdown - Length (L): 4.1 mm ± 0.3 - Width (W): 4.1 mm ± 0.3 - Height (H): 2.1 mm Max ```