The **SS26V-R100330** is a high-performance, dual-winding common mode choke coil, typically manufactured by KEMET. It is designed to suppress electromagnetic interference (EMI) in power supply lines. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical and physical properties: | Parameter | Specification | | :--- | :--- | | **Inductance (Min)** | 33.0 mH | | **Rated Current (AC)** | 1.0 A | | **Rated Voltage** | 250 VAC / VDC | | **DC Resistance (Max)** | 0.52 $\Omega$ per line | | **Operating Temperature** | -25°C to +120°C | | **Terminal Type** | Through-hole (Vertical mounting) | --- ### 2. Key Features and Construction The SS26V series utilizes high-permeability ferrite cores to achieve significant noise suppression in a compact footprint. * **Core Material:** Uses proprietary Ferrite (S18H material or equivalent) optimized for high-frequency noise attenuation. * **Vertical Configuration:** The "V" in the part number denotes a vertical mounting style, which saves PCB real estate compared to horizontal models. * **Dual Winding:** It consists of two separate windings on a single core. This allows the magnetic fields from the supply current to cancel out while providing high impedance to common-mode noise. --- ### 3. Application Areas This component is primarily found in the input stages of power electronics to meet EMC (Electromagnetic Compatibility) standards: 1. **Switch Mode Power Supplies (SMPS):** Prevents high-frequency switching noise from feeding back into the AC mains. 2. **Audio-Visual Equipment:** Ensures clean power for sensitive analog and digital circuits. 3. **Industrial Controllers:** Protects logic circuits from industrial electrical noise. 4. **Office Automation:** Used in printers and copiers to comply with regulatory EMI limits. --- ### 4. Circuit Symbol and Working Principle In a typical circuit, the SS26V-R100330 is placed at the AC input. ```mermaid graph LR Line_In -- Winding 1 -- Line_Out Neutral_In -- Winding 2 -- Neutral_Out ``` * **Common Mode Noise:** Noise appearing on both lines simultaneously is blocked by the high inductance of the coils. * **Differential Mode Signal:** The desired power current flows in opposite directions through the windings, resulting in zero net flux and low impedance.