The **CMH322522-R56ML** is a surface-mount (SMD) wire-wound chip inductor commonly used in high-frequency circuits. Below is a detailed breakdown of its specifications, construction, and applications. ### 1. Part Number Breakdown The part number follows a standard convention for electronic components: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **CMH** | Series Code | Wire-wound chip inductor (often High Current/High Frequency) | | **322522** | Dimensions | Metric size (3.2mm x 2.5mm x 2.2mm) - equivalent to EIA 1210 | | **R56** | Inductance Value | R represents the decimal point: **0.56 µH** | | **M** | Tolerance | **±20%** | | **L** | Packaging | Typically indicates Tape & Reel packaging | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer (such as Bourns or Chilisin), the general characteristics for an R56ML in this footprint are: | Parameter | Typical Value | | :--- | :--- | | **Inductance** | 0.56 µH | | **DC Resistance (DCR)** | ~0.15 - 0.40 Ω (Max) | | **Rated Current (Idc)** | ~450 mA to 700 mA | | **Self-Resonant Frequency (SRF)** | > 250 MHz | | **Operating Temperature** | -40°C to +125°C | | **Case Size** | 1210 (Inch) / 3225 (Metric) | --- ### 3. Internal Construction The CMH322522 series is built using a **wire-wound** architecture: * **Core Material:** Usually a Ferrite core to provide high inductance in a small volume. * **Winding:** Copper wire is wound around the core and laser-welded to the terminal electrodes. * **Coating:** Encapsulated in a heat-resistant molded resin for mechanical protection and moisture resistance. --- ### 4. Key Features and Applications #### Features * **High Q Factor:** Offers low loss at high frequencies compared to multilayer inductors. * **High Reliability:** The wire-wound structure is robust against thermal shock. * **Compact Footprint:** The 1210 size is ideal for density-populated PCBs. #### Applications 1. **Filtering:** Used in DC-DC converter output filters to smooth ripple current. 2. **Signal Processing:** High-frequency communication equipment and RF circuits. 3. **Consumer Electronics:** Found in tablets, smartphones, and wearable tech for power management modules. 4. **Automotive:** (If AEC-Q200 qualified) used in infotainment and ADAS sensors. ---