## Electronic Specifications: CTLQ1206NF-R82M The **CTLQ1206NF-R82M** is a surface-mount (SMD) multi-layer ferrite chip inductor. It is designed for high-density mounting in circuits where space is limited and electromagnetic interference (EMI) suppression is required. ### 1. Key Technical Specifications Below are the primary electrical characteristics for this specific part number: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Case Size** | 1206 (3.2mm x 1.6mm) | | **Test Frequency** | 25 MHz | | **DC Resistance (DCR) Max** | 0.45 Ω | | **Rated Current (Imax)** | 200 mA | | **Self-Resonant Frequency (SRF) Min** | 75 MHz | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the component's physical and electrical properties: * **CTLQ**: Series designation (Multi-layer Chip Inductor). * **1206**: Physical dimensions (Length 0.12", Width 0.06"). * **NF**: Non-shielded/Standard Ferrite material. * **R82**: Inductance value (R = Decimal point; 0.82 µH). * **M**: Tolerance code (M = ±20%). --- ### 3. Features and Applications #### Features * **Monolithic Structure:** Provides high reliability and excellent magnetic shielding to prevent crosstalk. * **Standard Footprint:** The 1206 package is compatible with standard automated pick-and-place machinery. * **Frequency Stability:** Designed to maintain stable inductance across its specified frequency range. #### Common Applications 1. **Noise Suppression:** Used in signal lines to filter out high-frequency noise. 2. **Power Supplies:** Small DC-DC converters for portable electronics. 3. **Communication Devices:** Mobile phones, pagers, and wireless LAN modules. 4. **Consumer Electronics:** Laptops, digital cameras, and tablets. --- ### 4. Typical Impedance vs. Frequency In ferrite inductors like the **CTLQ1206NF-R82M**, the impedance increases with frequency. At the **Self-Resonant Frequency (SRF)**, the inductor's parasitic capacitance cancels out the inductance, after which the component behaves like a capacitor. For effective filtering, it is best to operate the device well below its 75 MHz SRF.