The **SRP1235-R67M** is a high-current, shielded power inductor manufactured by **Bourns**. It is part of the SRP1235 series, specifically designed for high-density power supply applications like DC/DC converters. --- ### ## 1. Part Number Breakdown Understanding the nomenclature helps identify the component's characteristics: | Code Segment | Meaning | Value/Description | | :--- | :--- | :--- | | **SRP** | Series Name | High current power inductor | | **1235** | Package Size | ~13.5 x 12.5 x 3.5 mm | | **R67** | Inductance Value | 0.67 µH | | **M** | Tolerance | ±20% | --- ### ## 2. Key Specifications The SRP1235-R67M is engineered for high performance in compact spaces. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.67 µH | | **DC Resistance (DCR)** | 2.1 mΩ (typical) / 2.5 mΩ (max) | | **Irms (Heating Current)** | 30 Amperes | | **Isat (Saturation Current)** | 40 Amperes | | **Operating Temperature** | -45°C to +165°C | | **Shielding** | Magnetic shielding (low EMI) | --- ### ## 3. Core Features & Construction * **Carbonyl Powder Core:** The inductor uses a metal alloy powder core. This construction allows for high saturation currents and a "soft" saturation curve, meaning it doesn't lose inductance abruptly when current spikes. * **Flat Wire Technology:** It often utilizes flat wire windings to maximize the copper fill factor, which significantly reduces DC resistance (DCR) and improves thermal efficiency. * **Shielded Design:** The molded construction provides excellent magnetic shielding to minimize electromagnetic interference (EMI) with surrounding components. * **AEC-Q200 Compliant:** Most variants in this series are qualified for automotive use, ensuring high reliability in harsh environments. --- ### ## 4. Typical Applications The SRP1235-R67M is commonly found in the following circuits: 1. **Voltage Regulator Modules (VRMs):** Used in CPU/GPU power delivery for servers and laptops. 2. **DC/DC Converters:** High-efficiency buck or boost converters. 3. **Automotive Systems:** Driver assistance systems, infotainment, and lighting control. 4. **Industrial Power:** High-current power supplies for robotics and automation. --- ### ## 5. Comparison: SRP1235 vs. Standard Inductors ```markdown * Lower DCR: Reduced power loss and heat generation. * Higher Saturation: Handles large current transients without failing. * Compact Footprint: High power density for modern PCBs. ```