The **SS30V-R350047** is a high-performance **Common Mode Choke Coil** manufactured by KEMET (formerly NEC TOKIN). It is specifically designed for AC line noise suppression in power supply circuits. ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics. | Parameter | Specification | | :--- | :--- | | **Rated Current** | 3.5 Amps | | **Inductance (Min)** | 4.7 mH | | **DC Resistance (Max)** | 0.12 $\Omega$ per line | | **Rated Voltage** | 250 VAC / 300 VDC | | **Insulation Resistance** | 100 M$\Omega$ minimum (at 500 VDC) | | **Temperature Rise** | 55 K (Max) | | **Operating Temp Range** | -25°C to +120°C | --- ### 2. Physical Characteristics The "SS30V" series refers to the frame size and vertical mounting configuration. * **Mounting Type:** Through-hole (PCB). * **Orientation:** Vertical (saves horizontal board space). * **Core Material:** Ferrite (High permeability S18H material). * **Winding Structure:** Divided bobbin for high-frequency isolation. --- ### 3. Functional Purpose This component is used as a filter in the EMI (Electromagnetic Interference) stage of a power supply. * **Common Mode Noise Suppression:** It blocks high-frequency noise that flows in the same direction on both the Live and Neutral lines, preventing it from entering the device or leaking back into the power grid. * **Safety:** It provides galvanic isolation between the two winding paths to prevent short circuits. --- ### 4. Typical Applications You will commonly find the SS30V-R350047 in the following devices: 1. **Switching Power Supplies (SMPS):** Used in the input filter stage. 2. **Audio-Visual Equipment:** To prevent line noise from affecting signal quality. 3. **Industrial Electronics:** Protecting sensitive controllers from grid spikes. 4. **Office Automation:** Printers and photocopiers. ---