## SRP1235-R82M: Component Overview The **SRP1235-R82M** is a high-current, shielded power inductor manufactured by **Bourns**. It belongs to the SRP1235 series, which is designed for applications requiring high reliability and high power density. --- ### Technical Specifications | Parameter | Value | Details | | :--- | :--- | :--- | | **Inductance** | 0.82 µH | Rated at 100 kHz / 1 V | | **Tolerance** | ±20% | Standard for power inductors | | **Irms (Heating Current)** | 33 A | Current causing a 40°C temp rise | | **Isat (Saturation Current)** | 42 A | Current causing a 20% drop in inductance | | **DCR (DC Resistance)** | 2.3 mΩ (Max) | Very low resistance for high efficiency | | **Operating Temp** | -40 to +150 °C | Automotive grade capability | | **Shielding** | Shielded | Carbonyl powder core for low EMI | --- ### Key Features and Construction 1. **Material Technology:** It uses a **carbonyl powder core**. This construction allows for a high saturation current and provides a "soft" saturation characteristic, meaning the inductance doesn't drop off abruptly when current increases. 2. **Shielding:** The molded construction provides magnetic shielding, which minimizes Electromagnetic Interference (EMI) with surrounding components on the PCB. 3. **Flat Wire Design:** Many inductors in this series use flat wire technology to reduce DC resistance (DCR), which minimizes heat generation during high-current operation. 4. **AEC-Q200 Compliant:** This part is typically qualified for automotive use, ensuring high durability against thermal shock, moisture, and vibration. --- ### Common Applications * **DC/DC Converters:** Used as the main energy storage element in buck or boost regulators. * **Power Supplies:** Ideal for distributed power systems and workstations. * **Automotive Electronics:** Driver assistance systems, infotainment, and lighting. * **Industrial Equipment:** High-current POL (Point of Load) converters. --- ### Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **SRP** | Series Name (High Current Power Inductor) | | **1235** | Dimensions (Approx. 13.5mm x 12.5mm x 3.5mm) | | **R82** | Inductance Value (R82 = 0.82 µH) | | **M** | Tolerance (M = ±20%) |