The **CI201210-R15J** is a surface-mount multilayer ceramic chip inductor. It is commonly used in high-frequency circuits for noise filtering, signal processing, and impedance matching. Below is a detailed breakdown of its specifications and electronic characteristics. ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the physical and electrical properties: | Segment | Meaning | Value | | :--- | :--- | :--- | | **CI** | Series Type | Ceramic Inductor (Multilayer) | | **201210** | Case Size (Metric) | 2.0mm x 1.25mm x 1.0mm (EIA 0805) | | **R15** | Inductance Value | 0.15 µH (150 nH) | | **J** | Tolerance | ±5% | --- ### 2. Key Technical Specifications The electrical performance of this inductor is defined by its ability to maintain inductance at high frequencies while minimizing energy loss. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.15 µH (150 nH) | | **Tolerance** | ±5% | | **Test Frequency** | Usually 25 MHz or 100 MHz (depending on manufacturer) | | **DC Resistance (DCR)** | Max ~0.50 - 0.70 Ω (Typical) | | **Rated Current** | ~200mA - 300mA | | **Self-Resonant Frequency (SRF)** | > 450 MHz | | **Operating Temperature** | -55°C to +125°C | --- ### 3. Construction and Material * **Multilayer Technology:** Unlike wire-wound inductors, this part is made by layering ceramic material and conductive paste (usually silver) and co-firing them into a solid block. * **Monolithic Structure:** This provides excellent magnetic shielding, meaning it has low electromagnetic interference (EMI) leakage and can be placed close to other components. * **Termination:** Usually features a nickel/tin (Ni/Sn) barrier to ensure excellent solderability and resistance to leaching during the reflow process. ### 4. Typical Applications Because of its small size (0805) and high-frequency stability, the CI201210-R15J is found in: * **Mobile Devices:** Smart phones and tablets for RF deck filtering. * **WLAN/Bluetooth:** Matching circuits for antennas. * **High-speed Logic:** Decoupling and noise suppression in digital lines. * **Computer Peripherals:** USB and HDMI signal integrity. --- ### 5. Equivalent Packages If you are searching for footprints in PCB design software (like KiCad or Altium), use the following standard: * **Metric:** 2012 * **Imperial:** 0805 ---