The **LF2628NP-R513** is a high-performance common mode choke (inductor) designed primarily for noise suppression in power supply lines. It belongs to the LF series, typically manufactured by companies like Sumida. --- ### 1. Key Technical Specifications The part number "R513" specifically defines the inductance value and technical parameters: | Parameter | Value / Description | | :--- | :--- | | **Inductance (Min)** | 5.1 mH (at 10 kHz) | | **Rated Current** | ~3.0 A (rms) | | **DC Resistance (Max)** | ~0.10 Ω | | **Voltage Rating** | 250 VAC | | **Configuration** | Dual Winding (Common Mode) | | **Mounting Type** | Through-Hole (Vertical/Horizontal) | --- ### 2. Core Features * **High Impedance:** Excellent for filtering out high-frequency electromagnetic interference (EMI). * **Low Profile:** The "2628" designation refers to the physical dimensions of the core/base, optimized for space-constrained power boards. * **Safety Standards:** Built to meet major global safety requirements for power supplies (UL, CSA, IEC). * **Thermal Stability:** Designed to operate efficiently without significant inductance drop at higher temperatures. --- ### 3. Functional Application Common mode chokes like the LF2628NP-R513 are critical components in the **EMI Filter stage** of an electronic device. * **Noise Cancellation:** It allows differential signals (the power you want) to pass while creating high impedance for common-mode noise (unwanted interference affecting both lines). * **Primary Uses:** 1. Switch Mode Power Supplies (SMPS). 2. LED Drivers. 3. AC/DC Adapters. 4. Industrial electronic ballasts. --- ### 4. Dimensions and Pinout The "NP" indicates a standard non-potted or standard assembly style. ```text Pin Configuration (Simplified): Line In (1) ●───────┐ ┌───────● Line Out (4) ) ( ) ( <-- Magnetic Core ) ( Neutral In (2) ●────┘ └───────● Neutral Out (3) ```