The **CSBX1250-R82M** is a high-performance **Shielded Power Inductor** commonly used in DC-DC converters and high-current power supplies. It is designed to handle significant current loads while maintaining low electromagnetic interference (EMI). --- ## 1. Technical Specifications The part number follows a specific nomenclature used by manufacturers (like Chilisin or similar SMD inductor producers). Here is the breakdown of its key parameters: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 0.82 µH | Rated at 100kHz / 1.0V | | **Tolerance** | ±20% | Indicated by the "M" suffix | | **DCR (DC Resistance)** | ~1.3 mΩ to 1.8 mΩ | Typical low resistance to minimize heat loss | | **Saturation Current ($I_{sat}$)** | ~25A - 35A | The point where inductance drops by ~30% | | **Heat Rating Current ($I_{rms}$)** | ~20A - 28A | Current causing a 40°C temperature rise | | **Operating Temp.** | -40°C to +125°C | Standard industrial/automotive range | --- ## 2. Structural Characteristics The CSBX1250-R82M is built using a **Molding Process**, which provides several advantages: * **Magnetic Shielding:** The coil is encapsulated in a metal alloy powder. This results in very low leakage flux (EMI), making it safe to place near sensitive components. * **Physical Size (1250):** The numbers "1250" represent the footprint dimensions: * **Length/Width:** Approx. 13.5 mm x 12.5 mm * **Height:** Approx. 5.0 mm * **Material:** Usually made of Carbonyl Iron Powder or similar magnetic alloys that offer high saturation stability. --- ## 3. Typical Applications Due to its low inductance (0.82µH) and high current handling, it is ideal for: 1. **Voltage Regulator Modules (VRM):** Used in CPU/GPU power delivery. 2. **Point of Load (POL) Converters:** High-efficiency DC-DC step-down converters. 3. **Battery Powered Devices:** High-current chargers and power management ICs (PMICs). 4. **Distributed Power Systems:** High-density power supplies for servers. --- ## 4. Part Number Decoding The name can be broken down as follows: * **CSBX:** Series identifier (Shielded Alloy Inductor). * **1250:** Physical dimensions (13.5 x 12.5 x 5.0 mm). * **R82:** Inductance value ($R = \text{decimal point}$). $0.82 \mu H$. * **M:** Tolerance ($\pm 20\%$).