The **ELJNDR10F** is a surface-mount (SMD) wire-wound chip inductor manufactured by Panasonic. It belongs to the **ND series**, which is specifically designed for high-frequency circuits. --- ## 1. Technical Specifications The following table outlines the key electrical and physical parameters of the ELJNDR10F: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.1 µH (100 nH) | | **Tolerance** | ±1% | | **Case Code (Inch/Metric)** | 0402 / 1005 | | **DC Resistance (Rdc)** | 0.68 Ω (Max) | | **Rated Current** | 180 mA | | **Self-Resonant Frequency (SRF)** | 700 MHz | | **Quality Factor (Q)** | 8 (at 100 MHz) | | **Operating Temperature** | -40°C to +85°C | --- ## 2. Key Features * **High Precision:** The "F" suffix indicates a **±1% tolerance**, which is exceptionally tight for inductors, making it ideal for precision tuning. * **Wire-Wound Construction:** Unlike multilayer inductors, wire-wound components offer higher Q factors and lower DC resistance (DCR) at high frequencies. * **Miniature Size:** The 0402 footprint (1.0mm x 0.5mm) allows for high-density PCB layouts in portable electronics. * **Excellent Frequency Characteristics:** Designed to maintain stable inductance across a broad frequency range. --- ## 3. Applications The ELJNDR10F is typically used in circuits where signal integrity and precise frequency control are critical: 1. **RF Matching Networks:** Used to match impedance between antennas and transceivers (Wi-Fi, Bluetooth). 2. **Filter Circuits:** High-pass, low-pass, and band-pass filters in mobile communication devices. 3. **Oscillators:** Providing stable inductance for LC tank circuits. 4. **Signal Conditioning:** Decoupling and noise suppression in high-speed data lines. --- ## 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **ELJ**: Panasonic Chip Inductor series. * **ND**: Type (Wire-wound, High-frequency type). * **R10**: Inductance value (R represents the decimal point; R10 = 0.10 µH). * **F**: Tolerance code (F = ±1%, J = ±5%).