The **1210F-R15** is a specific code used to identify a **Surface Mount Device (SMD) Power Inductor**. To understand this part, we must break down the alphanumeric code into its technical specifications. --- ## 1. Part Number Breakdown The code is typically structured to indicate the physical size, tolerance, and inductance value. | Segment | Meaning | Technical Detail | | :--- | :--- | :--- | | **1210** | Case Size | Dimensions are 0.12 x 0.10 inches (approx. 3.2 x 2.5 mm). | | **F** | Tolerance | Indicates a **±1%** tolerance (Precision grade). | | **R15** | Inductance Value | "R" acts as a decimal point. R15 = **0.15 µH** (Microhenries). | --- ## 2. Technical Specifications While exact specs can vary slightly by manufacturer (such as Fastron or Bourns), a 1210F-R15 generally adheres to these parameters: ### Electrical Characteristics * **Inductance:** 0.15 µH. * **Tolerance:** ±1% (Standard inductors are often ±10% or ±20%, making the "F" version high-precision). * **Quality Factor (Q):** Typically high at specific frequencies (e.g., 30-40). * **Self-Resonant Frequency (SRF):** Usually very high, often above 400 MHz - 500 MHz. * **DC Resistance (DCR):** Low resistance to minimize power loss, typically in the range of 0.15 to 0.5 Ohms. ### Physical Characteristics * **Mounting Type:** SMD (Surface Mount Device). * **Core Material:** Usually Ceramic or Ferrite, depending on the frequency application. * **Packaging:** Provided on T&R (Tape and Reel) for automated pick-and-place machines. --- ## 3. Common Applications Due to its small size and high precision (1%), this component is frequently used in: 1. **RF Circuits:** Used in impedance matching and high-frequency filtering. 2. **Mobile Electronics:** Power management modules for smartphones and tablets. 3. **Decoupling:** Filtering high-frequency noise in sensitive digital circuits. 4. **Oscillators:** Providing stable inductance for frequency generation. --- ## 4. Comparison Table: 1210 vs. Other Sizes | Size Code (Imperial) | Metric Equivalent | Dimensions (mm) | Typical Use Case | | :--- | :--- | :--- | :--- | | 0805 | 2012 | 2.0 x 1.2 | Ultra-compact devices | | **1210** | **3225** | **3.2 x 2.5** | **General purpose / Power** | | 1812 | 4532 | 4.5 x 3.2 | Higher current handling | ---