The **CSHB0421R-R56M** is a high-current, surface-mount (SMD) power inductor. It is commonly used in DC-DC converters, voltage regulator modules (VRMs), and power supplies for high-performance computing. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's physical and electrical specifications: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **CSHB** | Series Name | High-current shielded power inductor | | **0421** | Dimensions | Approx. 4.0 x 4.0 x 2.1 mm | | **R** | Core Material | Often refers to Ferrite or Metal Alloy core | | **R56** | Inductance Value | **0.56 µH** (R denotes the decimal point) | | **M** | Tolerance | **±20%** | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer (such as Cyntec or Chilisin), the standard parameters for this specific part are: | Parameter | Typical Value | | :--- | :--- | | **Inductance** | 0.56 µH | | **DC Resistance (DCR)** | ~7.0 mΩ to 10.0 mΩ | | **Saturation Current (Isat)** | ~10A to 14A (Current where inductance drops 30%) | | **Heating Current (Irms)** | ~9A to 11A (Current causing 40°C temp rise) | | **Operating Temp** | -40°C to +125°C | --- ### 3. Key Features * **Magnetic Shielding:** The component is shielded, which minimizes electromagnetic interference (EMI) with surrounding components. * **Low Profile:** With a height of roughly 2.1mm, it is ideal for thin electronic devices like laptops or tablets. * **High Saturation:** Designed to handle high peak currents without the magnetic core "saturating," which would otherwise cause a loss of inductance. * **Metal Alloy Construction:** Usually features a molded metal powder body which provides soft saturation characteristics and better thermal stability. --- ### 4. Common Applications This inductor is typically found in: 1. **Motherboards & GPUs:** In the multi-phase power stages providing juice to CPUs and Graphics processors. 2. **Point of Load (POL) Converters:** Small, efficient power supplies located right next to the chip they power. 3. **Battery Powered Devices:** Due to low DCR, it helps maximize battery life by reducing power loss as heat.