The **SD14-102-R** is a specific model of a low-profile, shielded drum core inductor manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is part of the SD series, which is designed for high power density and energy storage in compact electronic circuits. --- ### 1. Technical Specifications The part number "102" indicates the inductance value, and "R" signifies RoHS compliance. | Parameter | Value | | :--- | :--- | | **Inductance** | 1000 µH (1.0 mH) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 11.20 Ohms (Typical) | | **Rated Current ($I_{rms}$)** | 0.137 Amps | | **Saturation Current ($I_{sat}$)** | 0.144 Amps | | **Package Size** | 5.2mm x 5.2mm x 1.45mm | | **Shielding** | Magnetically Shielded | --- ### 2. Key Features * **Low Profile:** At only 1.45mm height, it is ideal for thin consumer electronics where vertical space is limited. * **Magnetic Shielding:** The component is enclosed in a ferrite housing which minimizes Electromagnetic Interference (EMI), preventing the inductor from affecting nearby sensitive components. * **Drum Core Construction:** Provides high power density and high efficiency. * **Ferrite Material:** High-frequency material ensures low core losses. --- ### 3. Applications The SD14-102-R is commonly used in power management circuits where high inductance is needed in a small footprint: 1. **DC-DC Converters:** Used as a storage element in buck, boost, or SEPIC converters. 2. **LED Drivers:** Provides constant current regulation for backlight displays. 3. **Portable Electronics:** Found in smartphones, tablets, and wearables due to its low height. 4. **Filtering:** Used in input/output filters to smooth voltage ripples. --- ### 4. Part Number Breakdown The nomenclature for the SD series follows this logic: * **SD:** Series name (Shielded Drum). * **14:** Dimensions (Approx. 5.2mm x 1.45mm). * **102:** Inductance code ($10 \times 10^2$ = 1000 µH). * **-R:** RoHS compliant / Lead-free.