The **SRP1235-R68M** is a high-current, shielded power inductor manufactured by **Bourns**. It is widely used in DC/DC converters and power supply modules for high-reliability applications. --- ## 1. Technical Specifications The part number follows a specific nomenclature that defines its physical and electrical characteristics: | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Rated Current (Irms)** | 23 Amps (typical) | | **Saturation Current (Isat)** | 40 Amps (typical) | | **DC Resistance (DCR)** | 2.5 mΩ (max) | | **Operating Temperature** | -45°C to +150°C | | **Shielding** | Magnetic Shielded (Low Radiation) | --- ## 2. Key Physical Features ### Construction * **Carbonyl Iron Powder Core:** This material allows for a high saturation current and provides a "soft" saturation characteristic (it doesn't lose inductance abruptly when current increases). * **Molded Structure:** The wire is wound and then molded into a solid block of iron powder, which minimizes acoustic noise (humming). * **Shielding:** The design naturally shields the magnetic field, reducing Electromagnetic Interference (EMI) with neighboring components. ### Dimensions (1235 Series) The numbers `1235` represent the footprint and height in millimeters: * **Length/Width:** ~13.5 mm x 12.5 mm * **Height:** ~3.5 mm --- ## 3. Typical Applications The SRP1235-R68M is designed for high-density power environments where efficiency and heat management are critical: 1. **Voltage Regulator Modules (VRM):** Used in servers and workstations to provide stable power to CPUs/GPUs. 2. **DC/DC Converters:** Buck, Boost, and SEPIC converters in automotive or industrial electronics. 3. **Battery Powered Devices:** High-efficiency power management for portable equipment. --- ## 4. Part Number Breakdown The naming convention is structured as follows: ```text SRP 1235 - R68 M | | | | | | | +-- Tolerance (M = ±20%) | | +------ Inductance (R68 = 0.68 microhenries) | +--------------- Dimensions (Approx. 12x13mm, 3.5mm height) +-------------------- Series Name (High Current Shielded Inductors) ```