The **ELJNDR10KF** is a surface-mount (SMD) wire-wound fixed inductor manufactured by **Panasonic**. It belongs to the **ND series**, which is specifically designed for high-frequency circuits and general-purpose filtering. --- ### ## Technical Specifications The following table outlines the primary electrical and physical characteristics of the ELJNDR10KF: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.10 µH (100 nH) | | **Tolerance** | ±10% (K) | | **Case Size (EIA)** | 0805 | | **Case Size (Metric)** | 2012 | | **Rated Current** | 400 mA | | **DC Resistance (DCR)** | 0.44 Ω (Max) | | **Self-Resonant Frequency (SRF)** | 450 MHz (Min) | | **Quality Factor (Q)** | 10 (Min) | | **Operating Temperature** | -20°C to +85°C | --- ### ## Component Construction & Features 1. **Wire-Wound Structure**: Unlike multilayer inductors, this part uses a copper wire wound around a ceramic or ferrite core. This construction allows for higher current carrying capacity and a better Quality (Q) factor. 2. **Compact Form Factor**: The **0805 (2012)** size makes it ideal for high-density PCB layouts where space is limited. 3. **Resin Molded**: The component is typically encased in a protective resin, which provides excellent mechanical strength and resistance to humidity. 4. **Solder Heat Resistance**: It is designed to withstand standard reflow soldering temperatures used in modern manufacturing. --- ### ## Common Applications The ELJNDR10KF is versatile but is most commonly found in the following circuits: * **RF Matching Networks**: Used in wireless communication devices (Wi-Fi, Bluetooth) to match impedance between components. * **Signal Filtering**: Acts as a low-pass or high-pass filter to remove unwanted noise from high-frequency signal lines. * **Decoupling**: Helps isolate DC power supply noise from sensitive analog or digital sections of a circuit. * **Mobile Electronics**: Frequently used in smartphones, tablets, and wearable devices due to its small footprint. --- ### ## Part Number Breakdown Understanding the Panasonic nomenclature for this series: * **ELJ**: Panasonic Inductor prefix. * **ND**: Series identifier (General Purpose / High Frequency). * **R10**: Inductance value (R represents the decimal point: 0.10 µH). * **K**: Tolerance (±10%). * **F**: RoHS compliance / Lead-free status.