The **SS26V-R120220** is a high-performance, dual-winding common mode choke (inductor) typically manufactured by **KEMET**. It is designed for suppressing electromagnetic interference (EMI) in power supply circuits. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Parameter | Specification | | :--- | :--- | | **Series** | SS26V (High permeability, vertical mount) | | **Rated Current** | 1.2 Amperes (A) | | **Inductance (Min)** | 22.0 mH (millihenries) | | **DC Resistance (Max)** | 0.45 $\Omega$ (per line) | | **Temperature Rise** | 45 K (Max) | | **Rated Voltage** | 250 VAC | | **Operating Temperature** | -25°C to +120°C | --- ### 2. Key Features * **High Permeability Core:** Utilizes proprietary ferrite materials to achieve high inductance in a compact footprint. * **Vertical Configuration:** The "V" in the part number indicates a vertical mounting style, which saves PCB (Printed Circuit Board) real estate. * **Divided Bobbin:** Designed to reduce parasitic capacitance, which improves high-frequency noise suppression. * **Dual Winding:** Contains two separate coils wound on a single core to filter both lines (Line and Neutral) of an AC input. --- ### 3. Internal Structure & Schematic The device functions by providing high impedance to common-mode currents while allowing differential-mode currents (the actual power) to pass through with minimal resistance. ```text Pin 1 ●-------(Coil 1)-------● Pin 4 (Line In/Out) Pin 2 ●-------(Coil 2)-------● Pin 3 (Neutral In/Out) ``` --- ### 4. Common Applications * **Switch Mode Power Supplies (SMPS):** Filtering noise from high-frequency switching. * **Consumer Electronics:** Televisions, Audio equipment, and PC power units. * **Industrial Equipment:** Preventing EMI from leaking back into the AC mains. * **LED Drivers:** Reducing flicker and noise interference in lighting systems. --- ### 5. Physical Dimensions (Typical) * **Width:** ~23.0 mm * **Depth:** ~15.5 mm * **Height:** ~25.5 mm * **Lead Pitch:** 10.0 mm x 7.0 mm (standard through-hole mounting)