The **SS30V-R300071** is a high-performance, common-mode choke coil (inductor) typically used in power supply lines for noise suppression. It belongs to the **SS series** produced by manufacturers like KEMET (formerly Tokin). Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | Common Mode Choke | | **Rated Current** | 3.0 Amperes (A) | | **Inductance (Min)** | 7.1 mH (millihenries) | | **DC Resistance (Max)** | 110 mΩ (per line) | | **Rated Voltage** | 250 VAC / 250 VDC | | **Operating Temperature** | -25°C to +120°C | | **Dielectric Strength** | 2,000 VAC (for 1 minute) | --- ### 2. Physical & Material Features * **Core Material:** High-permeability Ferrite core. This allows for high inductance in a relatively compact size. * **Winding Structure:** It features a vertical mount design (hence the "V" in SS30V), which saves PCB real estate. * **Construction:** The coils are wound on a split bobbin to provide excellent insulation between the two lines and to enhance high-frequency performance. --- ### 3. Functional Role in Circuits The SS30V-R300071 serves two primary functions in electronic assemblies: 1. **Electromagnetic Interference (EMI) Filtering:** It suppresses common-mode noise flowing through AC power lines, preventing the device from emitting interference and protecting it from incoming surges. 2. **Signal Integrity:** It allows the desired "differential mode" current (the power needed for the device) to pass through with minimal resistance while blocking unwanted "common mode" noise. --- ### 4. Common Applications Due to its 3A rating and high inductance, this part is commonly found in: * **Switching Power Supplies (SMPS):** Used in the input filter stage. * **Consumer Electronics:** Televisions, audio equipment, and large household appliances. * **Industrial Equipment:** Power converters and motor controllers where noise regulation (CISPR/FCC) is required. --- ### 5. Identification Code Breakdown The part number follows a specific nomenclature: * **SS:** Series name. * **30V:** Physical size/frame and Vertical mounting style. * **R30:** Rated current (3.0 Amperes). * **0071:** Inductance value (7.1 mH).