The **SRP1038WA-R78M** is a high-current, shielded power inductor manufactured by Bourns. It is part of the SRP1038WA series, which is specifically designed to meet the high reliability and high temperature requirements of automotive and industrial applications. --- ### ## Technical Specifications Below are the key electrical and physical characteristics of the SRP1038WA-R78M: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.78 µH | | **Tolerance** | ±20% | | **Inductance Frequency** | 100 kHz / 1 V | | **Rated Current (Irms)** | 27.5 Amperes | | **Saturation Current (Isat)** | 35 Amperes | | **DC Resistance (DCR)** | 1.8 mΩ (Max) | | **Operating Temperature** | -55°C to +165°C | | **AEC-Q200 Qualified** | Yes | --- ### ## Key Features and Construction 1. **Shielded Construction:** The inductor is magnetically shielded, which ensures low magnetic field radiation. This is critical for preventing Electromagnetic Interference (EMI) in sensitive circuits. 2. **Metal Alloy Powder Core:** The core is made of a metal alloy powder that allows for high saturation currents and stable performance even at elevated temperatures. 3. **AEC-Q200 Compliance:** This rating indicates that the part has passed rigorous stress testing for automotive environments, including vibration, thermal shock, and moisture resistance. 4. **Flat Wire Technology:** This series often utilizes flat wire windings to minimize DC resistance (DCR) and maximize efficiency in a compact footprint. --- ### ## Common Applications The SRP1038WA-R78M is typically found in power management circuits where high efficiency and high current handling are required: * **Automotive Systems:** Driver assistance systems, information/entertainment systems, and lighting. * **DC/DC Converters:** Used as an output filter inductor in high-current buck/boost converters. * **Industrial Electronics:** Power supplies for robotics and automated machinery. * **Consumer Electronics:** High-performance laptops and gaming consoles. --- ### ## Package Footprint The "1038" in the part number refers to the physical dimensions: * **Length:** ~11.5 mm * **Width:** ~10.0 mm * **Height:** ~3.8 mm