The **2355-R** refers to a specific series of high-quality **Common Mode Chokes** manufactured by **Bourns Inc.** These components are essential in power electronics for filtering and noise suppression. --- ## 1. Technical Specifications The 2300 series (specifically the 2355-R) is designed for through-hole mounting on Printed Circuit Boards (PCBs). Below are the typical characteristics for this specific part: | Parameter | Specification | | :--- | :--- | | **Component Type** | Common Mode Choke | | **Inductance** | 2.5 mH (per winding) | | **Rated Current** | 1.8 Amps | | **DCR (Max)** | 0.200 Ohms | | **Mounting Type** | Through-Hole (Vertical/Horizontal) | | **Operating Temp** | -55°C to +105°C | --- ## 2. Key Features The "R" suffix in the part number typically denotes **RoHS Compliance**, meaning the part is lead-free and meets environmental safety standards. ### Physical Construction * **Core Material:** High-permeability ferrite core. * **Windings:** Dual windings designed to provide high impedance against common-mode noise while allowing differential signals to pass. * **Protection:** Often finished with a UL 94V-0 rated material for flame retardancy. --- ## 3. Applications The 2355-R is primarily used to eliminate Electromagnetic Interference (EMI) in power systems. Common use cases include: 1. **Switching Power Supplies (SMPS):** Filtering out high-frequency noise generated by switching transistors. 2. **AC/DC Adapters:** Preventing noise from the device from leaking back into the AC power line. 3. **Industrial Controls:** Protecting sensitive control logic from line interference. 4. **Telecom Equipment:** Ensuring signal integrity in data lines. --- ## 4. How it Works (Common Mode Logic) In a common-mode choke like the 2355-R, the magnetic fields from the two coils cancel each other out for "wanted" differential currents. however, for "unwanted" common-mode noise (noise traveling in the same direction on both wires), the magnetic fields add up, creating high impedance and effectively blocking the noise. ```python # Simplified Logic of Common Mode Suppression def filter_noise(signal_a, signal_b): if signal_a == signal_b: return "Blocked (Common Mode Noise)" else: return "Passed (Differential Signal)" ```