## SD3814-2R2-R Electronic Component Overview The **SD3814-2R2-R** is a low-profile, high-power density surface-mount (SMD) power inductor. It is part of the SD3814 series manufactured by **Eaton (formerly Bussmann)**. These inductors are specifically designed for applications where space is limited and high efficiency is required. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.052 Ω (Typical) | | **Saturation Current (Isat)** | 2.15 A | | **RMS Current (Irms)** | 1.83 A | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 4.0mm x 4.0mm x 1.4mm | --- ### 2. Physical Construction and Design * **Shielding:** It is a **shielded inductor**, which means it has a ferrite core construction that minimizes Electromagnetic Interference (EMI). This is crucial for densely packed circuit boards. * **Form Factor:** The "3814" in the part number refers to its dimensions (approx. 3.8mm to 4.0mm footprint and 1.4mm height). The low 1.4mm profile makes it ideal for ultra-thin electronics like smartphones or wearable tech. * **Material:** It uses a ferrite drum and sleeve core for high efficiency and stable performance across frequency ranges. --- ### 3. Common Applications Due to its balance of small size and current-handling capability, the SD3814-2R2-R is commonly found in: 1. **DC-DC Converters:** Used as a storage element in buck, boost, or buck-boost regulators. 2. **Mobile Devices:** Power management in smartphones, tablets, and handheld GPS units. 3. **Battery Powered Equipment:** Ideal for portable devices due to low DCR (which improves battery life by reducing heat loss). 4. **LED Drivers:** Used in backlighting circuits for small displays. --- ### 4. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **SD** | Series Name (Shielded Drum Inductor) | | **3814** | Dimensional code (Approx. 3.8x3.8x1.4mm) | | **2R2** | Inductance value (2.2 µH; 'R' acts as decimal point) | | **-R** | RoHS compliant / Lead-free | ---