## SD14-150-R Technical Overview The **SD14-150-R** is a high-performance, low-profile, shielded drum core inductor manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). It is part of the **SD series**, designed for high-density applications where space and electromagnetic interference (EMI) management are critical. --- ### 1. Key Technical Specifications The alphanumeric code "150" represents the inductance value, while the "R" indicates RoHS compliance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 15.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.165 Ω (Typical) | | **Rated Current (Irms)** | 1.25 A | | **Saturation Current (Isat)** | 1.48 A | | **Shielding** | Magnetic Shielding (Low EMI) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Construction The SD14 series is characterized by its compact, surface-mount (SMD) design: * **Core Material:** Ferrite drum core, which provides high efficiency and high saturation levels. * **Shielding:** The inductor is enclosed in a ferrite sleeve. This concentrates the magnetic flux within the component, preventing interference with neighboring components on the PCB. * **Form Factor:** * **Length:** 5.2 mm * **Width:** 5.2 mm * **Height:** 1.45 mm (Max) - This "low profile" makes it ideal for slim electronics like tablets or wearables. --- ### 3. Application Use Cases The SD14-150-R is primarily used in power management circuits. Common applications include: 1. **DC-DC Converters:** Acts as the energy storage element in buck (step-down), boost (step-up), and SEPIC converters. 2. **Buck Regulators:** Used in point-of-load (POL) power supplies for microprocessors. 3. **Noise Filtering:** Excellent for decoupling and EMI suppression in signal lines due to its shielded nature. 4. **Portable Electronics:** Used in mobile phones, digital cameras, and handheld gaming consoles where PCB vertical space is limited. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **SD:** Series name (Shielded Drum). * **14:** Size code (approx. 5.2mm x 5.2mm x 1.45mm). * **150:** Inductance code (15 followed by 0 zeros = 15 µH). * **R:** RoHS compliant / Lead-free. ---