The **SD10-8R2-R** is a specific model of a surface-mount power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the SD10 series, which is characterized by its low profile and shielded construction. --- ### 1. Technical Specifications The part number "8R2" indicates the nominal inductance value. Below are the primary technical parameters: | Parameter | Value | | :--- | :--- | | **Inductance** | 8.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.162 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 1.02 Amps | | **RMS Current ($I_{rms}$)** | 1.05 Amps | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Characteristics The "SD10" designation refers to the physical package size. These inductors are designed for high-density circuit boards where vertical space is limited. * **Dimensions:** Approximately 5.2mm x 5.2mm. * **Height:** 1.0mm (Ultra-low profile). * **Core Material:** Ferrite. * **Termination:** Lead-free, RoHS compliant (indicated by the "-R" suffix). --- ### 3. Key Functions & Applications The SD10-8R2-R acts as an energy storage device and a filter in electronic circuits. #### Typical Use Cases: 1. **DC-DC Converters:** Used in "Buck" (step-down) or "Boost" (step-up) regulators to smooth out current ripples. 2. **Noise Filtering:** Suppressing high-frequency electromagnetic interference (EMI) in power lines. 3. **Portable Electronics:** Ideal for smartphones, tablets, and wearables due to the 1.0mm height. 4. **LED Drivers:** Providing constant current for backlighting applications. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives or similar parts: | Segment | Meaning | | :--- | :--- | | **SD** | Series Name (Shielded Drum) | | **10** | Size Code (1.0mm height) | | **8R2** | Inductance Value (8.2 microhenries) | | **-R** | RoHS Compliant | --- ### 5. Schematic Representation In a circuit diagram, this component is represented as a standard inductor with two parallel lines above the coil symbol, indicating a ferrite core with shielding. ```spice * Typical application in a Buck Converter L1 Vin Vout 8.2uH ; Inductor SD10-8R2-R C1 Vout GND 22uF ; Output Capacitor ```