The **CTML0805F-R15K** is a surface-mount multilayer chip inductor. This specific component is commonly used in high-frequency circuits for noise filtering, signal processing, and impedance matching. Below is a detailed breakdown of its electronic characteristics and specifications. ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the physical and electrical properties: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **CTML** | Series | Multilayer Chip Inductor (Ferrite Core) | | **0805** | Case Size | 0.08 x 0.05 inches (2.0 x 1.25 mm) | | **F** | Lead-Free | RoHS Compliant / Green packaging | | **R15** | Inductance | 0.15 µH (Microhenries) | | **K** | Tolerance | ±10% | --- ### 2. Technical Specifications These parameters define the operational limits and performance of the inductor: * **Inductance:** 0.15 µH * **Tolerance:** ±10% * **Test Frequency:** Typically measured at 25 MHz. * **DC Resistance (DCR):** Usually low (approx. 0.40 - 0.60 Ω max), minimizing power loss as heat. * **Rated Current:** The maximum continuous current it can handle (typically around 200mA to 300mA for this size/value). * **Self-Resonant Frequency (SRF):** The frequency at which the part ceases to act as an inductor and begins to act as a capacitor (typically >250 MHz for this value). --- ### 3. Construction and Features Unlike wire-wound inductors, the **CTML** series uses a multilayer process: * **Material:** Ferrite-based magnetic material. * **Structure:** Internal silver (Ag) electrodes are layered within the ferrite body, creating a monolithic structure. * **Shielding:** Because the magnetic flux is contained within the body, these inductors are **self-shielding**, reducing electromagnetic interference (EMI) with surrounding components. * **Durability:** Excellent solderability and resistance to soldering heat due to the nickel barrier termination. --- ### 4. Common Applications Due to its small footprint and high-frequency characteristics, it is found in: 1. **Mobile Electronics:** Smartphones, tablets, and wearables. 2. **Filtering:** LC resonant circuits and low-pass filters for EMI suppression. 3. **Communication:** Bluetooth modules, Wi-Fi routers, and RF circuits. 4. **Decoupling:** Preventing high-frequency noise from entering the power supply rails of sensitive ICs. ---