The **CSAB0518-R68M** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converters and power management modules. This part is designed for high efficiency and low energy loss in compact electronic circuits. ### 1. Part Number Breakdown Understanding the nomenclature helps identify its physical and electrical characteristics: | Code Segment | Meaning | Specification | | :--- | :--- | :--- | | **CSAB** | Series Name | High-current power inductor series | | **0518** | Case Size | Dimensions (approx. 5.4mm x 5.2mm x 1.8mm) | | **R68** | Inductance Value | 0.68 µH (Microhenries) | | **M** | Tolerance | ±20% | --- ### 2. Technical Specifications Below are the typical electrical parameters for this specific component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.68 µH | | **DC Resistance (DCR)** | ~10.0 mΩ (Typical) | | **Saturation Current (Isat)** | ~14.0 A to 16.0 A | | **Heat Rating Current (Irms)** | ~8.0 A to 10.0 A | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetic Shielded (Low EMI) | --- ### 3. Key Features * **Low Profile:** The "18" in the code signifies a height of only 1.8mm, making it ideal for thin devices like laptops or tablets. * **Metal Composite Core:** Usually constructed with a carbonyl iron powder core which provides soft saturation characteristics (the inductance doesn't drop abruptly when current increases). * **Low EMI:** The shielded construction contains the magnetic flux, preventing interference with neighboring components on the PCB. * **High Efficiency:** Low DCR (Direct Current Resistance) minimizes power loss as heat. --- ### 4. Common Applications This inductor is typically found in the following circuits: 1. **Voltage Regulator Modules (VRM):** Used in CPUs and GPUs to smooth out current. 2. **Point of Load (POL) Converters:** Converting higher voltages to lower voltages for sensitive ICs. 3. **Battery Powered Devices:** Smartphones, SSDs, and handheld consoles where space is limited. 4. **Automotive Electronics:** Infotainment systems and ADAS sensors (if AEC-Q200 qualified). ---