The **SS21V-R110100** is a common mode choke coil manufactured by KEMET (specifically within the SS series). These components are primarily used for noise suppression in power supply circuits. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Series** | SS21V | | **Inductance (Min)** | 10.0 mH | | **Rated Current (AC)** | 1.1 A | | **DC Resistance (Max)** | 0.45 $\Omega$ per line | | **Temperature Rise (Max)** | 45 K | | **Operating Temp Range** | -25°C to +120°C | | **Rated Voltage** | 250 VAC | --- ### 2. Physical Characteristics * **Vertical Configuration:** The "V" in SS21V indicates a vertical mount design, which saves horizontal PCB space. * **Core Material:** Uses high-permeability ferrite (Mn-Zn) cores to achieve high inductance in a small footprint. * **Winding Structure:** It features a split-bobbin design which provides excellent insulation between the two coils. ### 3. Functional Purpose The SS21V-R110100 acts as a filter to eliminate **Common Mode Noise**. * **How it works:** It allows the desired "differential mode" current (the power going to your device) to pass through with minimal resistance, while creating high impedance for "common mode" noise (unwanted interference appearing on both power lines simultaneously). * **Applications:** * Switching power supplies. * LED lighting ballasts. * Audio-visual equipment. * Office automation devices. ### 4. Safety and Reliability * **Insulation Resistance:** Minimum 100 M$\Omega$ at 500 VDC. * **Dielectric Withstanding Voltage:** 2,000 VAC for one minute (between lines). * **Flame Retardancy:** Materials used typically meet UL 94 V-0 standards. ---