The **LF2628NP-R113** is a high-performance **Common Mode Choke Coil** manufactured by Sumida. It is primarily used in power supply circuits to suppress electromagnetic interference (EMI) and noise. --- ### 1. Technical Specifications The following table highlights the key electrical and physical characteristics of this component: | Parameter | Value/Description | | :--- | :--- | | **Inductance (Min)** | 11.0 mH | | **Rated Current (AC)** | 1.8 A | | **DC Resistance (Max)** | 0.20 $\Omega$ | | **Rated Voltage** | 250 VAC | | **Mounting Type** | Through-Hole (Vertical) | | **Core Material** | Ferrite | | **Operating Temp** | -40°C to +105°C | --- ### 2. Physical Construction The "LF2628" series refers to the physical frame size and winding style: * **Core Shape:** Usually a rectangular or "U" shaped ferrite core. * **Winding:** It features a dual-winding structure (four pins) where the two coils are wound symmetrically. * **Encapsulation:** It is an open-frame type with a plastic header/base to ensure proper lead spacing and insulation. --- ### 3. Functional Mechanism The LF2628NP-R113 acts as a filter in AC/DC power lines: * **Common Mode Suppression:** It provides high impedance against noise signals that are in phase on both lines (Common Mode), effectively blocking them from entering or exiting the device. * **Differential Mode Transparency:** It allows the desired power current (Differential Mode) to pass through with minimal resistance. --- ### 4. Typical Applications This component is commonly found in the input stages of: 1. **Switching Mode Power Supplies (SMPS):** To comply with EMC regulations (like FCC or CISPR). 2. **LED Drivers:** Preventing high-frequency switching noise from affecting the AC mains. 3. **Household Appliances:** Washing machines, refrigerators, and air conditioners. 4. **Industrial Electronics:** Noise filtering for motor controllers and sensors. --- ### 5. Identification Code Breakdown * **LF:** Line Filter series. * **2628:** Dimensions/Case size code. * **NP:** Standard packaging/No Pb (Lead-free). * **R113:** Inductance code (113 represents $11 \times 10^3$ $\mu$H, which equals 11 mH).