The **CDEP85NP-R50MC-125** is a high-power, surface-mount (SMD) power inductor manufactured by **Sumida**. It belongs to the CDEP85 series, which is specifically designed for high-current applications where stability and low resistance are critical. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics. | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 0.5 µH | | **Tolerance** | ±20% (Code: M) | | **DC Resistance (DCR)** | Max 3.6 mΩ (Typical 2.8 mΩ) | | **Saturation Current ($I_{sat}$)** | ~18.5 A (at 25°C) | | **Temperature Rise Current ($I_{rms}$)** | ~14.0 A | | **Operating Temperature** | -40°C to +125°C | | **Dimensions** | 8.0 x 8.0 x 5.6 mm | --- ### 2. Part Number Breakdown Understanding the code helps in identifying variations of this component: * **CDEP85**: Series name (indicates the physical size and construction style). * **NP**: Indicates the packaging type (usually Tape & Reel). * **R50**: Represents the inductance value. `R` acts as a decimal point, so `R50` = 0.50 µH. * **M**: Tolerance code (M = ±20%). * **C**: Internal factory/classification code. * **125**: Often refers to the height or a specific versioning (in this case, part of the high-current series). --- ### 3. Key Features & Construction * **Magnetic Shielding:** The inductor is magnetically shielded, which minimizes Electromagnetic Interference (EMI) with surrounding components on the PCB. * **Ferrite Core:** Utilizes a high-performance ferrite core that allows for high saturation current levels without significant inductance drops. * **Low DCR:** The use of thick copper wire ensures extremely low DC resistance, which reduces power loss and heat generation. --- ### 4. Typical Applications Due to its high current handling and compact size, the CDEP85NP-R50MC-125 is commonly found in: 1. **DC-DC Converters:** Used in Point-of-Load (POL) modules for CPUs and GPUs. 2. **Voltage Regulator Modules (VRM):** Essential for high-speed switching power supplies. 3. **Industrial Electronics:** Power stages for motor drives or heavy-duty sensors. 4. **Automotive:** Infotainment systems and LED lighting drivers (where high reliability is required). ---