## SRP1040-R39M Electronic Component Overview The **SRP1040-R39M** is a high-current, shielded power inductor manufactured by **Bourns**. It is specifically designed for high-frequency DC/DC converter applications where space and efficiency are critical. --- ### 1. Key Technical Specifications | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.39 µH (Microhenries) | | **Tolerance** | ±20% | | **Inductance Code** | R39 | | **DCR (Direct Current Resistance)** | 1.3 mΩ (Max) | | **Irms (Heating Current)** | 30.0 A | | **Isat (Saturation Current)** | 40.0 A | | **Operating Temperature** | -40 °C to +125 °C | | **Packaging / Case** | 10.0 x 11.5 x 3.8 mm (1040 Size) | --- ### 2. Detailed Part Breakdown * **Carbonyl Iron Powder Core:** The inductor uses a metal alloy powder core. This construction allows for high saturation currents and provides "soft" saturation characteristics compared to ferrite cores. * **Shielded Construction:** The part is magnetically shielded to ensure low magnetic radiation, which minimizes Electromagnetic Interference (EMI) with neighboring components. * **AEC-Q200 Compliance:** Most parts in the SRP1040 series are automotive grade, meaning they are tested for high reliability in harsh environments. --- ### 3. Part Number Decoding (SRP1040-R39M) | Segment | Meaning | Description | | :--- | :--- | :--- | | **SRP** | Series Name | High current, shielded power inductor series. | | **1040** | Physical Size | Approx. 10mm length and 4.0mm height. | | **R39** | Inductance Value | R represents decimal point: 0.39 µH. | | **M** | Tolerance | Standard ±20% tolerance. | --- ### 4. Common Applications * **Voltage Regulator Modules (VRMs):** Found in servers and desktop computers. * **DC/DC Converters:** Used in distributed power systems and battery-powered devices. * **Automotive Electronics:** Powering infotainment, LED lighting, and driver assistance systems. * **Power Supplies:** High-efficiency point-of-load (POL) converters.