The **ACV-B141-R** is a specific electronic component, typically categorized as a **Surface Mount (SMD) Common Mode Choke**. It is primarily used in power electronics and signal processing to filter out high-frequency electromagnetic interference (EMI). --- ### 1. General Specifications While specific parameters can vary by manufacturer (often associated with brands like **Aillen** or **Coilmaster**), the part number "141" and "R" suffix usually denote its physical dimensions and RoHS compliance. | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | Common Mode Choke / Filter | | **Package/Case** | SMD (Surface Mount Device) | | **Inductance** | Specified in $\mu$H (varies by sub-type) | | **DC Resistance (DCR)** | Low (designed for high efficiency) | | **Rated Current** | Typically high (used in power lines) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Core Functions The ACV-B141-R serves several critical roles in a circuit: 1. **Noise Suppression:** It suppresses common-mode noise while allowing desired signals (differential mode) to pass through. 2. **EMI Filtering:** It prevents electromagnetic interference from exiting a device and entering the power grid, or vice versa. 3. **Signal Integrity:** In data lines, it helps maintain clean waveforms by removing high-frequency spikes. --- ### 3. Internal Structure and Diagram The device consists of two coils wound on a single ferrite core. ```text Pin 1 ●-------(Coil 1)-------● Pin 2 (Core) Pin 4 ●-------(Coil 2)-------● Pin 3 ``` - **Magnetic Core:** Usually high-permeability ferrite. - **Winding:** Copper wire with specialized insulation to prevent short circuits. --- ### 4. Applications This component is commonly found in the following environments: * **Switch Mode Power Supplies (SMPS):** To filter AC line noise. * **USB/HDMI Interfaces:** To ensure high-speed data transmission remains clean. * **Automotive Electronics:** Used in CAN-bus systems for noise immunity. * **Consumer Electronics:** Chargers, adapters, and LED drivers. --- ### 5. Identification Key * **ACV:** Series designation (often Automotive or AC-line series). * **B:** Material or winding type code. * **141:** Physical size code (e.g., 14mm x 14mm or specific height profile). * **R:** Denotes "RoHS Compliant" or "Tape & Reel" packaging.