The **CTML1206-R15M** is a surface-mount multilayer chip inductor. This specific part number follows a standard naming convention used by manufacturers like Central Technologies. --- ### 1. Technical Specifications | Parameter | Value | Description | | :--- | :--- | :--- | | **Inductance** | 0.15 µH | The nominal inductance value (R15 = 0.15). | | **Tolerance** | ±20% | Indicated by the "M" suffix. | | **Case Size** | 1206 (3216 Metric) | Physical dimensions: approx. 3.2mm x 1.6mm. | | **Type** | Multilayer Inductor | Constructed with layers of ceramic and conductive paste. | | **DCR (Max)** | ~0.30 - 0.50 Ω | DC Resistance (varies slightly by specific brand). | | **Rated Current** | ~200 - 300 mA | Maximum continuous current before overheating. | --- ### 2. Part Number Breakdown * **CTML**: Series Prefix (Central Technologies Multilayer Inductor). * **1206**: The physical package size (0.12 inches by 0.06 inches). * **R15**: The inductance code. "R" acts as a decimal point, meaning 0.15 Microhenries (µH). * **M**: The tolerance code. M = ±20% (K would be ±10%). --- ### 3. Key Features and Applications #### Features: * **Magnetic Shielding:** The multilayer structure provides a closed magnetic circuit, minimizing electromagnetic interference (EMI) and crosstalk with neighboring components. * **Compact Size:** The 1206 footprint is small enough for high-density PCB designs but large enough for easy automated assembly. * **High Reliability:** No lead wires to break; the monolithic structure is robust against vibration. #### Common Uses: 1. **Noise Suppression:** Used in high-frequency filtering to remove ripple from power lines. 2. **Signal Conditioning:** Decoupling and filtering in communication equipment. 3. **Consumer Electronics:** Found in mobile phones, motherboards, and portable GPS units. --- ### 4. Layout Considerations When designing a PCB for the CTML1206-R15M, ensure: * **Pad Geometry:** Use standard 1206 land patterns to ensure strong solder fillets. * **Current Limits:** Do not exceed the rated current, as saturation will cause the inductance to drop significantly, and excessive heat may damage the component.