The **CS321613-R10K** is a surface-mount (SMD) multilayer chip inductor. It is commonly used in high-frequency filtering and signal decoupling applications. ### 1. Part Number Breakdown Understanding the nomenclature helps identify its physical and electrical properties: | Component Segment | Meaning | Detail | | :--- | :--- | :--- | | **CS** | Series Code | Multilayer Chip Inductor | | **3216** | Dimensions (Metric) | 3.2mm x 1.6mm (Equivalent to **1206** Imperial) | | **13** | Thickness | Approximately 1.3mm | | **R10** | Inductance Value | R10 = 0.10 µH (100 nH) | | **K** | Tolerance | ±10% | --- ### 2. Key Electrical Specifications While specific values can vary slightly by manufacturer (such as Bourns or Chilisin), the standard parameters for a 0.10 µH 1206 inductor are: * **Inductance:** 100 nH (0.10 µH) * **Tolerance:** ±10% * **Test Frequency:** Typically 25 MHz * **Quality Factor (Q):** Usually 25–30 (minimum) at test frequency. * **Self-Resonant Frequency (SRF):** Approximately 250–300 MHz. * **DC Resistance (DCR):** Low, typically around 0.25Ω to 0.40Ω. * **Rated Current:** Usually ranges between 200mA and 400mA (depending on temperature rise). --- ### 3. Construction and Material * **Internal Structure:** It is a "Multilayer" inductor, meaning it is constructed by layering ceramic material and conductive paste (usually Silver) in a spiral pattern and firing them together into a monolithic block. * **Magnetic Shielding:** Because the coil is buried inside the ceramic body, these inductors are inherently self-shielding, reducing electromagnetic interference (EMI) with neighboring components. * **Termination:** Features solder-plated end-caps (usually Nickel/Tin over Silver) for standard Reflow or Wave soldering. --- ### 4. Common Applications Due to its 1206 size and 100nH inductance, this part is ideal for: 1. **EMI Suppression:** Filtering high-frequency noise in power lines. 2. **Signal Conditioning:** Used in RF circuits to block high frequencies while passing low frequencies. 3. **Decoupling:** Placed near IC power pins to prevent digital noise from entering the power plane. 4. **Mobile Electronics:** Used in tablets, smartphones, and laptops where space is at a premium.