The **CTMC1008F-R018K** is a high-frequency, wire-wound surface mount (SMD) inductor. It is part of the CTMC1008F series, commonly used in radio frequency (RF) circuits and high-speed signal filtering. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's key specifications: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **CTMC** | Series Type | Molded Chip Inductor (Wire-wound) | | **1008** | Case Size | 0.10 x 0.08 inches (approx. 2.5 x 2.0 mm) | | **F** | Lead-Free | RoHs compliant material | | **R018** | Inductance Value | 0.018 µH (or 18 nH) | | **K** | Tolerance | ±10% | --- ### 2. Technical Specifications Below are the typical electrical characteristics for this specific component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.018 µH (18 nH) | | **Tolerance** | ±10% | | **Test Frequency** | 50 MHz | | **Quality Factor (Q) Min** | 28 (at test frequency) | | **Self-Resonant Frequency (SRF)** | ~2500 MHz (Minimum) | | **DC Resistance (DCR) Max** | 0.15 Ω | | **Rated DC Current (Idc)** | ~700 mA | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Key Electronic Features * **Molded Construction:** The wire-wound coil is encapsulated in a molded resin, providing excellent mechanical strength and environmental protection against moisture and physical shock. * **High SRF (Self-Resonant Frequency):** Because the SRF is high (2.5 GHz), this inductor remains effective in high-frequency RF applications without turning into a capacitor. * **Low DCR:** The low DC resistance ensures minimal power loss and heat generation, making it efficient for power management in small circuits. * **Standard Footprint:** The 1008 (2520 metric) package is a standard size for automated SMT (Surface Mount Technology) assembly lines. --- ### 4. Common Applications This part is typically found in: * **Mobile Communication:** Cell phones and GPS modules. * **WLAN/Bluetooth:** Matching circuits for antennas and RF front-ends. * **High-Speed Signal Lines:** Filtering electromagnetic interference (EMI). * **Broadband Equipment:** Modems and routers.