The **LPAU-142MA-R** is a specific surface-mount electronic component, typically categorized as a **Common Mode Choke (Filter)**. These components are essential for EMI (Electromagnetic Interference) suppression in high-speed data lines. --- ### 1. Technical Specifications The following table highlights the general electrical characteristics associated with this series of common mode filters: | Parameter | Specification (Typical) | |:---|:---| | **Component Type** | Common Mode Choke / Filter | | **Impedance (@ 100MHz)** | ~90Ω to 240Ω (Model dependent) | | **Rated Current** | 100mA - 400mA | | **DC Resistance (DCR)** | < 1.0 Ω | | **Rated Voltage** | 50V DC | | **Insulation Resistance** | 10MΩ Min | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Core Functions The LPAU-142MA-R performs two primary roles in a circuit: 1. **Noise Suppression:** It filters out "Common Mode" noise—signals that appear on both lines of a differential pair—without degrading the actual data signal. 2. **Signal Integrity:** By reducing EMI, it ensures that high-speed signals (like USB or HDMI) meet regulatory compliance (FCC/CE) and operate without data loss. --- ### 3. Physical Attributes & Package * **Mounting Type:** SMD (Surface Mount Device). * **Footprint:** Typically a small 0504 or 0805 equivalent metric size (approx. 1.2mm x 1.0mm or 2.0mm x 1.2mm). * **Construction:** Wire-wound ferrite core or multilayer ceramic technology, designed for high-density PCB layouts. --- ### 4. Typical Applications These parts are commonly found in consumer electronics where space is limited and high-speed data is present: * **USB 2.0/3.0 Ports:** To prevent radio frequency interference. * **IEEE1394 (Firewire):** For stable data transmission. * **LVDS Lines:** Used in LCD panel interfaces. * **Mobile Devices:** Smartphones and tablets to shield sensitive antennas from processor noise. --- ### 5. Identification Code Breakdown While naming conventions vary by manufacturer (such as Taiyo Yuden or Murata), the code usually breaks down as follows: * **LP/LPAU:** Series identifier (Low Profile / Array Unit). * **142:** Size code (dimensions in mm). * **M/A:** Tolerance and Material characteristics. * **R:** Packaging code (usually signifies "Tape and Reel").