## Electronic Specifications: CMS2-3-R (High-Current Inductor) The **CMS2-3-R** is a high-current, low-profile power inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the CMS series, commonly used in automotive and industrial applications due to its rugged design and efficient energy storage capabilities. ### 1. General Technical Specifications Below are the primary electronic parameters for the CMS2-3-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 3.3 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 11.0 Amps | | **Saturation Current (Isat)** | 16.0 Amps | | **DC Resistance (DCR)** | 6.5 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | Surface Mount (SMD) | --- ### 2. Key Electronic Components & Design The CMS2-3-R is engineered with specific materials to handle high power densities: * **Core Material:** It typically utilizes a **powdered iron or ferrite core** (depending on the specific revision) designed for low core losses at high frequencies. * **Winding:** Uses high-conductivity copper wire with high-temperature insulation to minimize DC Resistance (DCR), which reduces heat generation. * **Shielding:** The "CMS" series is magnetically shielded. This is critical for preventing Electromagnetic Interference (EMI) from affecting surrounding sensitive electronic components on a PCB. * **Termination:** Lead-free (RoHS compliant) matte tin over copper plating, suitable for standard reflow soldering. --- ### 3. Typical Applications Because of its high current handling and compact footprint, the CMS2-3-R is found in: 1. **DC-DC Converters:** Used as an energy storage element in buck or boost converters. 2. **Voltage Regulator Modules (VRM):** Providing stable power to microprocessors. 3. **Automotive Electronics:** Powering infotainment systems or ECU power stages. 4. **Industrial Controls:** Filtering and noise suppression in heavy-duty power supplies. --- ### 4. Footprint and Mechanical Data The "2" in the part number indicates the physical size class, while "3" indicates the specific winding configuration. ```text Approximate Dimensions: - Length: 9.4 mm - Width: 9.4 mm - Height: 3.5 mm (Max) ```