## SD52-330-R Electronic Component Overview The **SD52-330-R** is a high-performance, surface-mount (SMD) power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the SD52 series, which is characterized by its shielded construction and compact footprint. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the SD52-330-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 33.0 µH | | **Tolerance** | ±20% | | **Maximum DC Resistance (DCR)** | 0.187 Ω (187 mΩ) | | **Saturation Current ($I_{sat}$)** | 1.02 A | | **RMS Current ($I_{rms}$)** | 0.94 A | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 5.2mm x 5.2mm x 2.0mm | --- ### 2. Physical & Material Composition - **Shielding:** It features a ferrite core and a ferrite sleeve. This magnetic shielding minimizes Electromagnetic Interference (EMI), preventing the inductor from affecting nearby sensitive components. - **Form Factor:** The "52" in the part number refers to the dimensions (approx. 5.2mm square). The "2" indicates the height profile (approx. 2.0mm), making it ideal for low-profile electronics. - **Terminations:** It uses lead-free (RoHS compliant) matte tin-plated terminations, ensuring compatibility with standard reflow soldering processes. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **SD** | Series Name (Shielded Drum) | | **52** | Size Dimensions (5.2mm x 5.2mm) | | **330** | Inductance Value (33 + 0 zeros = 33µH) | | **R** | RoHS Compliant / Lead-Free | --- ### 4. Common Applications Due to its balance of size and current handling, the SD52-330-R is frequently found in: * **DC-DC Converters:** Used as an energy storage element in buck or boost regulators. * **Portable Electronics:** Smartphones, tablets, and handheld devices where space is limited. * **Computer Peripherals:** Hard drives and SSD power management. * **LED Drivers:** Providing stable current for lighting applications. ---