The **SD6030-151-R** is a high-performance, shielded surface-mount (SMD) power inductor. It is part of the SD6030 series manufactured by **Eaton (formerly Coiltronics)**. These components are primarily used for energy storage and filtering in DC-DC converters and power supplies. --- ## 1. Technical Specifications The part number "151" indicates the inductance value, while the "R" indicates compliance with RoHS standards. | Feature | Specification | | :--- | :--- | | **Inductance** | 150 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.540 Ω (Max) | | **Irms (Rated Current)** | 0.65 Amps | | **Isat (Saturation Current)** | 0.72 Amps | | **Dimensions (L x W x H)** | 6.0mm x 6.0mm x 3.0mm | | **Shielding** | Magnetically Shielded | --- ## 2. Key Internal Components ### A. Ferrite Core The inductor uses a ferrite drum core. Ferrite is used because of its high magnetic permeability and low electrical conductivity, which reduces "eddy current" losses at high frequencies. ### B. Magnetic Shielding The "SD" in the series stands for Shielded. The core is encased in a ferrite-epoxy resin. * **Purpose:** It minimizes Electromagnetic Interference (EMI) by containing the magnetic flux within the component. * **Benefit:** Allows the part to be placed close to sensitive components without causing noise interference. ### C. Copper Winding High-purity copper wire is wound around the core. The thickness of this wire determines the **DCR** (DC Resistance) and the **Irms** (current carrying capacity before overheating). --- ## 3. Physical Footprint & Construction The SD6030 uses a square base design which provides high mechanical stability during PCB assembly. * **Construction:** Ferrite drum and ring core construction. * **Termination:** Lead-free (RoHS compliant) tin-plated copper terminals. * **Operating Temperature:** Typically rated for **-40°C to +125°C**, making it suitable for industrial environments. --- ## 4. Typical Applications Because of its 150µH inductance and 3mm low-profile height, it is commonly found in: 1. **Buck/Boost Converters:** Stepping voltage up or down in battery-powered devices. 2. **LED Drivers:** Providing constant current for lighting circuits. 3. **Noise Filtering:** Acting as a choke to remove high-frequency noise from power lines. 4. **LCD Displays:** Used in the power management units of small to medium screens.