The **2115-R** typically refers to a specific series of high-quality **Common Mode Chokes** (inductors) manufactured by companies like **Bourns**. These components are essential in power electronics for filtering electromagnetic interference (EMI). --- ### 1. Key Technical Specifications Below are the typical parameters for the 2115-R series (specifically the Bourns 2100 series): | Parameter | Specification (Typical) | | :--- | :--- | | **Inductance** | Range from 1.0 mH to 100 mH (model dependent) | | **Current Rating** | High current capacity (up to several Amps) | | **Mounting Type** | Through-hole (Vertical or Horizontal) | | **Core Material** | Ferrite / Powdered Iron | | **Operating Temp** | -55°C to +105°C | --- ### 2. Physical Construction The "2115-R" part is characterized by its mechanical design: * **Toroidal Core:** Uses a ring-shaped core to minimize magnetic flux leakage. * **Dual Winding:** It features two separate windings on a single core. This allows it to suppress noise that is common to both lines (Common Mode) while letting the desired signal (Differential Mode) pass. * **Encapsulation:** Often coated in epoxy or UL-rated shrink tubing for insulation and environmental protection. * **Lead Finish:** The "R" suffix usually denotes **RoHS Compliance** (Lead-free). --- ### 3. Functional Applications These parts are primarily used for "Clean Power" requirements: 1. **EMI/RFI Suppression:** Prevents high-frequency noise from entering or leaving a device via the power lines. 2. **Switching Power Supplies (SMPS):** Used at the input stage to filter out the high-frequency switching noise generated by MOSFETs. 3. **Industrial Controllers:** Protects sensitive logic circuits from surges and electrical noise on the factory floor. 4. **Audio Equipment:** Used in high-end power conditioners to prevent "hum" or interference in the audio signal. --- ### 4. Schematic Representation In a circuit diagram, the 2115-R is represented as two coupled inductors: ```text Line In (1) o---( ( (---o (2) Line Out ( ( ( Neut In (4) o---( ( (---o (3) Neut Out Core ``` ---