The **SRP1250-R82M** is a high-current, shielded power inductor manufactured by Bourns. It is part of the SRP1250 series, widely used in automotive and industrial power electronics due to its robust construction and high reliability. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electronic characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Inductance Code** | R82 (0.82) | | **Operating Temperature** | -40 °C to +150 °C | | **Inductance Measurement Freq.** | 100 kHz / 1 V | | **Core Material** | Carbonyl Powder | --- ### 2. Current Ratings The SRP1250 series is characterized by its ability to handle significant current without saturating quickly. * **Irms (Heating Current):** Approximately **27 Amperes**. This is the DC current that causes the temperature of the part to rise by 40 °C. * **Isat (Saturation Current):** Approximately **42 Amperes**. This is the DC current at which the inductance drops by 20% or 30% from its nominal value. * **DCR (DC Resistance):** Typically **1.6 mΩ** (max 2.0 mΩ), which ensures high efficiency and minimal power loss as heat. --- ### 3. Construction and Features The physical and material build of the SRP1250-R82M makes it suitable for harsh environments: * **Shielding:** It is magnetically shielded, which minimizes Electromagnetic Interference (EMI) with surrounding components. * **Flat Wire Construction:** Uses flat wire technology to achieve lower DCR and higher current capacity within a smaller footprint. * **AEC-Q200 Compliance:** Most variants in this series are automotive grade, meaning they undergo rigorous stress testing. * **Physical Size:** The "1250" prefix indicates the footprint size (approx. 13.5 x 12.5 mm with a 5.0 mm height). --- ### 4. Common Applications This inductor is typically found in high-frequency DC/DC converters and power supplies for: 1. **Automotive Systems:** Driver assistance, infotainment, and lighting. 2. **Consumer Electronics:** High-end laptops and gaming consoles. 3. **Industrial:** Distributed power systems and DC/DC modules. ---