The designation **1C5-R** typically refers to a specific type of **Surface Mount Device (SMD) Power Inductor**. These components are critical in power management circuits, specifically within DC-DC converters. --- ### 1. Component Overview The "1C5" part of the code usually denotes the **inductance value**, while the "R" often signifies the decimal point or a specific tolerance/series designation. | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Fixed Inductor / Power Choke | | **Inductance Value** | 1.5 microhenries (µH) | | **Mounting Type** | SMD (Surface Mount Device) | | **Core Material** | Ferrite or Metal Composite | | **Application** | Voltage regulation, noise filtering | --- ### 2. Breakdown of the Part Number In electronic component marking, the alphanumeric code identifies the electrical properties: * **1**: The first significant digit. * **C / R**: In many manufacturer schemes, "R" or a letter represents the decimal point. Therefore, **1R5** or **1C5** translates to **1.5**. * **5**: The multiplier or second digit. * **Final Value**: **1.5 µH**. --- ### 3. Key Electrical Characteristics When selecting or replacing a 1C5-R inductor, three parameters are vital: 1. **Inductance (1.5µH):** The ability to store energy in a magnetic field. 1.5µH is considered a low inductance value, typical for high-frequency switching regulators. 2. **DC Resistance (DCR):** The internal resistance of the copper wire. A lower DCR results in higher efficiency and less heat generation. 3. **Saturation Current ($I_{sat}$):** The maximum current at which the inductance drops (usually by 20-30%). Exceeding this causes the inductor to lose effectiveness. 4. **RMS Current ($I_{rms}$):** The continuous current the part can handle without overheating. --- ### 4. Common Applications These parts are found in modern compact electronics due to their small footprint: * **Graphic Cards (GPUs):** Used in the VRM (Voltage Regulator Module) phases. * **Motherboards:** Filtering power for CPUs and RAM. * **Smartphones:** Managing battery power for various internal chips. * **LED Drivers:** Stabilizing current for high-brightness LEDs. ---