The **SCEP147L-R50** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converters and high-current power supplies. It is manufactured by companies like **Sumida**. --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the SCEP147L-R50: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.5 µH (Microhenries) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~1.55 mΩ (Max) | | **Saturation Current (Isat)** | ~46.0 A | | **Temperature Rise Current (Irms)** | ~25.0 A | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 15.0 x 15.0 x 8.0 mm (approx) | --- ### 2. Key Components & Construction The "SCEP" series is designed for efficiency and durability. Its internal structure consists of: 1. **Magnetic Core:** Typically a Manganese-Zinc (Mn-Zn) ferrite core. This material offers high permeability and low losses at high frequencies. 2. **Flat Wire Winding:** Unlike standard round-wire inductors, this part often uses flat copper wire. This reduces the **Skin Effect** and allows for a lower DC Resistance (DCR), enabling higher current handling without overheating. 3. **Shielded Design:** The inductor is magnetically shielded. This minimizes Electromagnetic Interference (EMI) with surrounding components on the PCB. 4. **Terminal Structure:** The base is designed for robust surface mounting (SMD), ensuring stability under mechanical vibration. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **SCEP:** Series name (High Current Power Inductor). * **147L:** Refers to the physical dimensions (approx. 14mm-15mm footprint, "L" for specific height/profile). * **R50:** The inductance value. "R" acts as a decimal point. **R50 = 0.50 µH**. --- ### 4. Typical Applications Due to its high saturation current and low DCR, the SCEP147L-R50 is found in: * **Voltage Regulator Modules (VRMs):** Powering CPUs and GPUs in servers and workstations. * **DC-DC Converters:** Point-of-Load (POL) power supplies. * **Automotive Electronics:** Infotainment and high-current power distribution. * **Industrial Power:** High-efficiency buck/boost converters.