The **CTSEP1204KF-R68M** is a high-performance, shielded surface-mount (SMD) power inductor. It is commonly used in DC-DC converters and power management modules where high current handling and low electromagnetic interference (EMI) are required. ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's core characteristics: | Code Segment | Meaning | Details | | :--- | :--- | :--- | | **CTSEP** | Series Name | High-current, shielded molded power inductor series. | | **1204** | Dimensions | Approximately 13.5mm x 12.5mm (Footprint size). | | **KF** | Core Material | Specific iron powder or composite material for high saturation. | | **R68** | Inductance Value | **0.68 µH** (R denotes the decimal point). | | **M** | Tolerance | **±20%** industry standard tolerance. | --- ### 2. Technical Specifications Below are the typical electrical parameters for this specific component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.68 µH | | **DC Resistance (DCR)** | ~1.5 mΩ (Max) | | **Isat (Saturation Current)** | ~49.0 A (Current where inductance drops by ~20-30%) | | **Irms (Rated Current)** | ~30.0 A (Current causing a 40°C temperature rise) | | **Operating Temp** | -55°C to +125°C | | **Shielding** | Magnetically Shielded (Molded construction) | --- ### 3. Key Features & Construction * **Molded Construction:** The coil is encapsulated in a magnetic metal powder composite. This design eliminates the "buzz" noise (acoustic noise) found in traditional inductors. * **High Saturation:** Unlike ferrite cores that saturate "hard" (dropping inductance abruptly), this part has a "soft" saturation curve, making it safer for high-transient circuits. * **Low DCR:** The use of thick flat or round copper wire minimizes power loss through heat, increasing overall power supply efficiency. * **Shielding:** The molded body acts as a natural shield, significantly reducing EMI (Electro-Magnetic Interference) which protects nearby sensitive components. --- ### 4. Common Applications Due to its high current rating and small footprint, the CTSEP1204KF-R68M is found in: 1. **Voltage Regulator Modules (VRMs):** Used in CPU and GPU power delivery. 2. **DC/DC Converters:** Point-of-load (POL) converters in industrial and telecom equipment. 3. **Battery Powered Systems:** High-efficiency power management for portable electronics. 4. **Automotive Electronics:** Infotainment and driver assistance systems (provided it meets AEC-Q200 standards).