The **SD52-100-R** is a high-performance, surface-mount (SMD) power inductor part of the SD series manufactured by **Eaton (formerly Coiltronics)**. It is widely used in power management circuits due to its compact size and high energy storage capabilities. --- ### 1. Key Technical Specifications The "100" in the part number indicates the inductance value, while the "R" signifies RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 10.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.0528 Ω (Max) | | **Rated Current (Irms)** | 1.94 Amps | | **Saturation Current (Isat)** | 1.83 Amps | | **Core Material** | Ferrite | | **Shielding** | Shielded (Magnetic) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Characteristics & Construction The SD52 series is designed for efficiency and durability in a small footprint. * **Shielding:** It is a magnetically shielded inductor. This prevents electromagnetic interference (EMI) from affecting surrounding components, which is critical for high-density PCB designs. * **Dimensions:** The "52" indicates the package size: * **Width/Length:** Approx. 5.2 mm x 5.2 mm. * **Height:** Approx. 2.0 mm. * **Mounting:** SMD (Surface Mount Device) with a flat top surface suitable for automated "pick and place" assembly. --- ### 3. Typical Applications The SD52-100-R is primarily found in DC-DC conversion circuits. Common use cases include: 1. **Buck/Boost Converters:** Stepping voltage up or down in battery-powered devices. 2. **Computers & Peripherals:** Used in laptops and storage drives for local power regulation. 3. **Consumer Electronics:** Powering digital cameras, MP3 players, and handheld gaming consoles. 4. **LED Drivers:** Providing stable current to high-brightness LEDs. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: * **SD:** Series name (Shielded Drum Core). * **52:** Physical dimensions (5.2mm footprint). * **100:** Inductance code (10 + 0 zeros = **10 µH**). * **R:** RoHS compliant (Lead-free).