The **PCMC042T-R22MN** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converters and high-current power supplies. It is manufactured by **Cyntec** (part of the Susumu group). --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its physical and electrical characteristics. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.22 µH (Microhenries) | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | ~3.5 mΩ (Typical) | | **Saturation Current (Isat)** | ~12.5A to 14.5A | | **Heating Current (Irms)** | ~9.0A | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 042T (approx. 4.0 x 4.0 x 2.0 mm) | --- ### 2. Key Features * **Molded Structure:** The inductor is made of a metal powder core molded around the coil. This "shielded" construction minimizes electromagnetic interference (EMI). * **High Current Handling:** Due to the metal alloy core, it can handle high saturation currents without the inductance dropping sharply. * **Low DCR:** The low direct-current resistance ensures minimal power loss and heat generation, making it highly efficient. * **Soft Saturation:** Unlike ferrite inductors that drop inductance suddenly, this molded type has a gradual saturation curve. --- ### 3. Part Number Breakdown The naming convention provides specific details about the component: | Code | Meaning | | :--- | :--- | | **PCMC** | Series Name (Molded Power Inductor) | | **042T** | Dimensions: 4.5 x 4.1 x 2.0 mm | | **R22** | Inductance Value: R22 = 0.22 µH | | **M** | Tolerance: ±20% | | **N** | Manufacturing/Internal Code (Lead-free/RoHS) | --- ### 4. Applications This component is typically found in: 1. **Voltage Regulator Modules (VRM):** For CPUs and GPUs in laptops. 2. **DC-DC Converters:** Point-of-load (POL) power supplies. 3. **Portable Electronics:** Tablets and smartphones requiring high current in a small footprint. 4. **Automotive:** Infotainment systems and ADAS modules (if AEC-Q200 qualified).