The **CDR10TR** refers to a specific series of surface-mount power inductors commonly used in power management circuits. These components are designed to store energy in a magnetic field and are critical for stabilizing voltage and filtering noise. --- ### 1. Key Technical Specifications The "CDR" series typically follows a standard naming convention related to its dimensions and magnetic properties. | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | Unshielded Power Inductor | | **Inductance Range** | 1.0µH to 1000µH (depending on specific model) | | **Tolerance** | Usually ±10% (K) or ±20% (M) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Operating Temp** | -40°C to +125°C | ### 2. Physical Construction The CDR10 series is characterized by its "Drum Core" construction: * **Core Material:** Ferrite (high permeability to maximize inductance). * **Winding:** Copper wire wound around a bobbin-shaped core. * **Base:** Features a flat top for automated "pick and place" assembly on PCBs. * **Unshielded Design:** Unlike shielded inductors, these have an open magnetic path, which makes them cost-effective but requires careful PCB placement to avoid EMI (Electromagnetic Interference). ### 3. Application Areas These parts are most commonly found in high-current power supplies and DC-DC converters. 1. **Buck/Boost Converters:** Used to step voltage up or down in battery-powered devices. 2. **Filtering:** Acts as a low-pass filter to smooth out ripples in power lines. 3. **Consumer Electronics:** Found in laptops, LED drivers, and power adapters. 4. **Telecommunications:** Used in base station power modules and routers. ### 4. Part Number Breakdown (Example) While suffixes can vary by manufacturer (like Sumida or Bourns), a common breakdown is: * **CDR:** Core type (Circular/Drum). * **10:** Size code (refers to the diameter, roughly 10mm). * **TR:** Tape and Reel (indicates the packaging method for automated assembly). --- ### 5. Selection Considerations When replacing or designing with a CDR10TR inductor, you must check: * **DCR (DC Resistance):** Lower resistance reduces heat and energy loss. * **Saturation Current ($I_{sat}$):** The point where inductance drops; exceeding this can cause circuit failure. * **RMS Current ($I_{rms}$):** The continuous current the inductor can handle without overheating.