The **ESD-R-220814XH-R1** is a specific type of **EMI (Electromagnetic Interference) Core** or **Ferrite Core** manufactured by KEMET. It belongs to the ESD-R series, designed to suppress high-frequency noise in electronic circuits. --- ### 1. Key Technical Specifications Below are the primary physical and electrical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Material Type** | Manganese-Zinc (Mn-Zn) | | **Shape** | Round (Toroidal / Ring Core) | | **Outer Diameter (OD)** | Approx. 22.0 mm | | **Inner Diameter (ID)** | Approx. 8.0 mm | | **Thickness (H)** | Approx. 14.0 mm | | **Coating** | Epoxy / Phenolic (High-temperature resistance) | | **Frequency Range** | High frequency suppression (AM band to several MHz) | --- ### 2. Functional Purpose The primary function of this part is to act as a **Low-Pass Filter**. It is used to protect sensitive electronics from electromagnetic noise or to prevent a device from emitting interference. * **Common Mode Choke:** When wires are passed through the center of this core, it creates inductance that opposes high-frequency noise while allowing the desired low-frequency signal or DC power to pass. * **Impedance:** It provides high impedance against unwanted noise, effectively dissipating the noise energy as a tiny amount of heat. ### 3. Electronic Characteristics * **Permeability:** Mn-Zn materials typically offer high initial permeability, making them highly effective for lower frequency noise suppression compared to Ni-Zn cores. * **Thermal Stability:** The "XH" designation often indicates high-temperature stability, allowing the part to operate reliably in automotive or industrial environments. * **Non-Conductive Coating:** The outer shell ensures that the core does not short-circuit against nearby PCB traces or bare wires. ### 4. Typical Applications 1. **Consumer Electronics:** Noise filtering for power cables in TVs or gaming consoles. 2. **Industrial Equipment:** Reducing switching noise in Motor Drivers and Inverters. 3. **Power Supplies:** Used on the input/output stages of AC/DC converters to meet EMC (Electromagnetic Compatibility) standards. 4. **Automotive:** Filtering noise in on-board chargers or ECU power lines. --- ### 5. Installation Note To maximize effectiveness, the wire should be passed through the center of the ring. If space permits, **looping the wire through the core multiple times** (increasing the number of turns) will significantly increase the noise suppression capability (inductance increases by the square of the turns).