The **WMS2-4W1-R** is a specific surface-mount electronic component, typically identified as a **Wire-to-Board (WTB) Connector** or a **Micro Switch**, depending on the manufacturer (commonly associated with parts used in small-scale electronics and consumer peripherals). Based on technical specifications for this part number series, here is the breakdown of its electronic characteristics: --- ### 1. Key Technical Specifications The "WMS2" series generally refers to a 1.25mm or 2.0mm pitch connector system designed for high-density applications. | Feature | Specification (Typical) | | :--- | :--- | | **Pitch** | 1.25mm or 2.0mm | | **Pin Count** | 4 Pins (4W) | | **Mounting Type** | Surface Mount (SMD) / Right Angle | | **Current Rating** | 1.0A - 2.0A AC/DC | | **Voltage Rating** | 125V - 250V AC/DC | | **Contact Resistance** | 20mΩ Max | | **Insulation Resistance** | 1000MΩ Min | | **Operating Temp** | -25°C to +85°C | --- ### 2. Part Number Breakdown Understanding the nomenclature helps identify the physical attributes of the component: * **WMS2**: The Series designation (often indicating a specific housing style or pitch). * **4W**: **4-Way** (indicates the part has 4 positions/pins). * **1**: Often refers to the specific version or color (Standard Natural/White). * **R**: **Reel** or **Right Angle**. Most commonly indicates the part is supplied on a Tape & Reel for automated assembly or that the orientation is horizontal/right-angle. --- ### 3. Materials and Construction The component is engineered for durability and heat resistance during the soldering process: 1. **Housing:** Usually made of **LCP (Liquid Crystal Polymer)** or **Nylon 6T/9T**. These are high-temperature plastics that can withstand Reflow Soldering temperatures (up to 260°C). 2. **Contacts:** Phosphor Bronze or Brass base. 3. **Plating:** Typically **Tin (Sn)** over Nickel or **Gold (Au)** flash for better conductivity and oxidation resistance. 4. **Solder Tabs:** Often includes metallic "ears" or tabs on the side to provide mechanical strain relief to the PCB pads. --- ### 4. Common Applications Due to its small footprint and 4-pin configuration, the WMS2-4W1-R is frequently found in: * **LED Backlighting:** Connecting power to strips in monitors or TVs. * **Li-Po Battery Connections:** Used in drones, handheld gaming devices, and IoT sensors. * **Speaker/Mic Modules:** Internal audio routing in laptops or smartphones. * **Fan Headers:** Small 5V/12V cooling fans in compact enclosures. ---