The **M5R15RL-R** is a specific part number belonging to the **M5** series of surface-mount (SMD) Power Inductors, typically manufactured by companies like **Coilmaster Electronics** or similar specialist magnetic component producers. These components are designed for high-efficiency power conversion, specifically in DC-DC buck or boost converters. --- ### 1. Technical Specifications The part number "M5R15RL-R" can be broken down into its technical characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 0.15 µH | The "R15" denotes 0.15 microhenries. | | **Tolerance** | ±20% | Standard "M" tolerance (typical for this series). | | **Core Material** | Carbonyl Powder / Metal Alloy | Provides high saturation current and low core loss. | | **Shielding** | Magnetically Shielded | Reduces EMI (Electromagnetic Interference). | | **Mounting Type** | SMD/SMT | Surface Mount Technology for automated PCB assembly. | | **RoHS Status** | Compliant | The "-R" suffix usually denotes RoHS compliance and Reel packaging. | --- ### 2. Key Electronic Features The M5 series is known for its **molded construction**, which offers several electronic advantages: * **High Saturation Current ($I_{sat}$):** Because it uses a metal alloy core, the inductance stays stable even when high levels of current pass through it, preventing the circuit from failing under load. * **Low DCR (DC Resistance):** It uses flat or heavy-gauge copper wire to minimize energy loss as heat, improving the overall efficiency of the power supply. * **Low Acoustic Noise:** The molded structure encapsulates the coil, reducing the "buzzing" or physical vibration caused by switching frequencies. * **Soft Saturation:** Unlike ferrite cores that drop inductance sharply at a limit, these parts lose inductance gradually, making the power supply more stable. --- ### 3. Common Applications Due to its low inductance (0.15µH) and high current handling, this part is typically found in high-frequency switching environments: 1. **Voltage Regulator Modules (VRM):** Used in CPUs and GPUs where high current and fast transient response are required. 2. **Portable Electronics:** Smartphones, tablets, and laptops. 3. **DC-DC Converters:** Point-of-Load (POL) power supplies. 4. **Automotive Infotainment:** Compact power modules for in-car electronics. --- ### 4. Footprint and Dimensions While exact dimensions should be verified via the manufacturer's datasheet, the "M5" prefix generally refers to a specific size code (often roughly 5mm x 5mm or similar). ```text [ Top View ] [ Side View ] +-----------+ +-------+ | | | | | R15 | <--- | | <--- Height (usually 1.2mm - 3.0mm) | | Marking +-------+ +-----------+ [Solder Pads] ``` ---