## Technical Overview of SRP1045-R80M The **SRP1045-R80M** is a high-current, shielded power inductor manufactured by **Bourns**. It belongs to the SRP1045 series, which is specifically designed for applications requiring high saturation current and low DC resistance in a compact surface-mount package. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.80 µH | | **Tolerance** | ±20% (indicated by the 'M' suffix) | | **Inductance Code** | R80 (R indicates decimal point) | | **Rated Current (Irms)** | 18 Amps (typical) | | **Saturation Current (Isat)** | 32 Amps (typical) | | **DC Resistance (DCR)** | 3.3 mΩ Max | | **Operating Temperature** | -40 °C to +125 °C | | **Package Size** | 10.4 x 11.5 x 4.8 mm | --- ### 2. Core Features & Construction * **Shielded Structure:** The inductor is constructed with a metal alloy powder core. This provides magnetic shielding, which minimizes Electromagnetic Interference (EMI) with surrounding components. * **High Saturation Current:** Unlike traditional ferrite inductors, the metal powder core allows for "soft saturation," meaning the inductance drops gradually rather than abruptly as current increases. * **Low DCR:** The use of flat or heavy-gauge wire results in very low DC resistance, which reduces power loss and heat generation during operation. * **RoHS Compliant:** The part is lead-free and meets environmental safety standards. --- ### 3. Application Areas The SRP1045-R80M is primarily used in power management circuits where high efficiency and high current handling are required: 1. **DC/DC Converters:** Used as a storage inductor in buck, boost, and buck-boost regulators. 2. **Computing:** Voltage Regulator Modules (VRMs) for CPUs and GPUs. 3. **Consumer Electronics:** Power supplies for laptops, game consoles, and high-end workstations. 4. **Industrial:** Distributed power systems and high-current point-of-load (POL) modules. --- ### 4. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **SRP** | Series Name (High Current Power Inductor) | | **1045** | Dimensions (Approx. 10mm x 11mm base, 4.5mm height) | | **R80** | Inductance value (0.80 µH) | | **M** | Tolerance (±20%) |