## Electronic Specifications: SD3812-101-R The **SD3812-101-R** is a low-profile, shielded drum core power inductor manufactured by **Eaton (formerly Bussmann)**. It is specifically designed for applications where space is limited and EMI (Electro-Magnetic Interference) needs to be minimized. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics for this specific part number: | Parameter | Value | | :--- | :--- | | **Inductance** | 100 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR) Typical** | 2.16 Ω | | **DC Resistance (DCR) Max** | 2.59 Ω | | **Saturation Current ($I_{sat}$)** | 0.22 Amps | | **RMS Current ($I_{rms}$)** | 0.322 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | --- ### 2. Physical Characteristics The "3812" in the part number refers to the physical dimensions of the component. * **Dimensions:** Approximately 4.0mm x 4.0mm. * **Height:** 1.2mm (Maximum). * **Mounting Type:** Surface Mount (SMD/SMT). * **Construction:** Ferrite drum core with a ferrite sleeve to reduce EMI. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **SD** | Series Prefix (Shielded Drum Inductor) | | **3812** | Size Code (Approx 3.8mm wide, 1.2mm high) | | **101** | Inductance Code (10 + one zero = 100µH) | | **-R** | RoHS Compliant | --- ### 4. Typical Applications Due to its small footprint and shielding, the SD3812-101-R is commonly found in: * **Mobile Devices:** Smartphones and tablets. * **Buck/Boost Converters:** DC-to-DC power conversion. * **LED Drivers:** Small-scale lighting circuits. * **Wearables:** Devices requiring ultra-low profile components.