The **SS20H-R05350** is a specific model of a **Common Mode Choke Coil** (Inductor) manufactured by **KEMET** (formerly NEC-Tokin). It is primarily used for noise suppression in alternating current (AC) power lines. --- ## 1. Key Technical Specifications Below are the primary electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Inductance (Min)** | 35.0 mH | | **Rated Current (AC)** | 0.5 A | | **DC Resistance (Max)** | 1.80 $\Omega$ | | **Temperature Rise (Max)** | 45 K | | **Rated Voltage (AC)** | 250 VAC | | **Insulation Resistance** | 100 M$\Omega$ (at 500 VDC) | | **Operating Temp Range** | -25°C to +120°C | --- ## 2. Structural Composition The part number can be broken down to understand its physical build: * **Series (SS):** Standard type, through-hole mounting. * **Size (20):** Refers to the physical frame size (approx. 20mm height). * **Orientation (H):** High permeability core, horizontal mounting type. * **Core Material (R):** High-frequency Ferrite core optimized for electromagnetic interference (EMI) suppression. * **Rated Current (05):** 0.5 Amperes. * **Inductance (350):** 35.0 mH. --- ## 3. Core Functions and Applications ### A. Common Mode Noise Suppression This component is designed to filter out high-frequency noise that travels in the same direction on both power lines (L and N). It allows the 50/60Hz power signal to pass while providing high impedance to unwanted interference. ### B. Applications * **Switching Power Supplies:** Preventing internal switching noise from feeding back into the grid. * **Consumer Electronics:** Found in TVs, audio equipment, and white goods to ensure compliance with EMC (Electromagnetic Compatibility) regulations. * **Office Automation:** Used in printers and copiers to stabilize power input. --- ## 4. Advantages 1. **Compact Design:** High inductance in a relatively small footprint due to the high-permeability core. 2. **Safety Compliance:** Designed to meet international safety standards for insulation between coils. 3. **Broadband Filtering:** Effective against a wide range of frequencies, specifically in the kHz to low MHz range.