## SRP4020CC-R68M: Electronic Component Analysis The **SRP4020CC-R68M** is a high-current, shielded power inductor manufactured by Bourns. It is part of the SRP4020CC series, specifically designed for high-density power applications where space is limited and electromagnetic interference (EMI) must be minimized. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics of the component: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **SRP** | Series Name | High current shielded power inductor | | **4020** | Size Code | Approx. 4.0 x 4.0 mm footprint, 2.0 mm height | | **CC** | Core Material | Carbonyl Powder (high efficiency, high stability) | | **R68** | Inductance Value | 0.68 µH (Microhenries) | | **M** | Tolerance | ±20% | --- ### 2. Key Specifications The following table highlights the critical electrical and physical parameters: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.68 µH | | **Irms (Heating Current)** | ~7.5 A to 8.5 A (causes 40°C temp rise) | | **Isat (Saturation Current)** | ~10 A to 12 A (causes 30% drop in inductance) | | **DCR (DC Resistance)** | ~10.5 mΩ (Typical) / 12.5 mΩ (Max) | | **Operating Temperature** | -55°C to +125°C | | **Shielding** | Magnetic Shielded (low radiation) | --- ### 3. Technical Features * **Carbonyl Powder Core:** This material provides a "soft" saturation characteristic, meaning the inductance drops gradually as current increases, rather than failing abruptly. * **Low EMI:** The molded construction integrates the magnetic shielding into the body, which effectively contains the magnetic flux and prevents interference with nearby sensitive components. * **High Efficiency:** The low DC Resistance (DCR) minimizes power loss as heat, making it suitable for battery-powered devices. --- ### 4. Common Applications Due to its small footprint and high current capability, the SRP4020CC-R68M is typically used in: * **DC/DC Converters:** Point-of-Load (POL) power supplies. * **Consumer Electronics:** Smartphones, tablets, and laptops. * **Industrial Power:** Compact power modules and LED lighting drivers. * **Automotive (Non-Safety):** Infotainment systems and onboard electronics. ---