## Overview of SD14-680-R The **SD14-680-R** is a high-power, low-profile inductor part of the SD series manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is specifically designed for surface-mount applications requiring high energy storage and efficiency. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the SD14-680-R: | Parameter | Value | | :--- | :--- | | **Inductance** | 68 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.817 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 0.51 Amps | | **RMS Current ($I_{rms}$)** | 0.56 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | --- ### 2. Physical Construction The "SD" in the part number stands for "Shielded Drum." Its construction features provide several benefits for electronic circuits: * **Magnetic Shielding:** The component is enclosed in a ferrite core, which minimizes **Electromagnetic Interference (EMI)**. This is crucial for densely packed PCBs where components are close to sensitive signals. * **Low Profile:** The "14" in the series indicates a specific height (approx. 1.45mm), making it ideal for thin devices like smartphones, tablets, and wearables. * **Ferrite Core:** This material allows for high frequency operation and low core losses. --- ### 3. Application Use Cases The SD14-680-R is commonly found in the following circuit types: 1. **DC-DC Converters:** Used as an energy storage element in Buck (step-down) or Boost (step-up) converters. 2. **Power Management Integrated Circuits (PMICs):** Ideal for managing power rails in portable electronics. 3. **LED Drivers:** Helps regulate current for backlighting or lighting modules. 4. **Battery Powered Equipment:** Its small footprint and efficiency help extend battery life. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying similar parts: * **SD:** Series name (Shielded Drum). * **14:** Size code (refers to physical dimensions/height). * **680:** Inductance value (68 followed by 0 zeros = 68 µH). * **R:** RoHS compliant (Lead-free).