Based on the part number **135B-R10**, this typically refers to a high-current, surface-mount (SMD) **Power Inductor**, most commonly manufactured by companies like **Sumida** or similar magnetic component specialists. Below is a detailed breakdown of its electronic characteristics. --- ### 1. General Specifications The "135" series generally refers to the physical dimensions of the component, while "R10" indicates the inductance value. | Parameter | Typical Value | Notes | | :--- | :--- | :--- | | **Inductance** | 0.10 µH (100nH) | "R" acts as a decimal point. | | **Tolerance** | ±20% | Standard for power inductors. | | **Mounting Type** | Surface Mount (SMD) | Designed for automated PCB assembly. | | **Core Material** | Ferrite | High efficiency, low loss at high frequencies. | ### 2. Key Electrical Features High-current inductors like the 135B-R10 are designed for high-density power applications. * **Low DCR (DC Resistance):** Because the inductance is very low (0.10 µH), the internal copper winding is usually thick, resulting in extremely low resistance. This minimizes power loss through heat ($P = I^2R$). * **High Saturation Current ($I_{sat}$):** These parts are engineered to handle high surges of current without the magnetic core losing its inductive properties. * **Operating Frequency:** Optimized for high-frequency DC-DC converters (often in the MHz range). ### 3. Physical Dimensions (Typical) While exact sizes can vary slightly by manufacturer, the "135" series usually follows these approximate metric dimensions: | Dimension | Measurement (Approx.) | | :--- | :--- | | **Length** | 13.0 mm | | **Width** | 13.0 mm | | **Height** | 5.0 mm - 6.0 mm | ### 4. Common Applications Due to its low inductance and high current capacity, the 135B-R10 is primarily used in: * **Voltage Regulator Modules (VRMs):** Found on computer motherboards and GPUs. * **DC-DC Buck Converters:** Used to step down voltage in high-power systems. * **Server Power Supplies:** Where high efficiency and high current density are required. --- ### Internal Structure ```mermaid graph LR A[Solder Pad] --- B[Copper Coil] B --- C[Ferrite Core] C --- D[Shielding Case] D --- E[Solder Pad] ``` ---