The **WMS2-1B-R/Q** is a specific variant of a mechanical switch, typically categorized as a **Micro Switch** or **Snap Action Switch**. These components are widely used in industrial controls, automotive systems, and consumer electronics due to their high reliability and rapid switching action. --- ## 1. Technical Specifications The part number break-down generally refers to the physical build, electrical rating, and terminal configuration. | Parameter | Typical Specification | | :--- | :--- | | **Switch Type** | Miniature Snap Action / Micro Switch | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Actuator Type** | Simulated Roller Lever / Lever Arm | | **Operating Force** | Medium (Typically 50g - 150g) | | **Voltage Rating** | 125V AC / 250V AC | | **Current Rating** | 1A to 5A (Depending on exact sub-series) | | **Termination** | Quick Connect / Solder Terminals | --- ## 2. Key Electronic Components & Materials The internal architecture of the WMS2-1B-R/Q consists of several precision-engineered parts: ### A. Contact Material * **Silver Alloy:** Most variants use silver-plated contacts to ensure low electrical resistance and minimize oxidation over time. * **Gold Plating (Optional):** Some 'Q' variants may feature gold-crossbar contacts for low-current (logic level) switching to prevent "fretting" corrosion. ### B. The Spring Mechanism * **Beryllium Copper Leaf:** The "snap" action is driven by a high-tension spring. This ensures that the transition between "Normally Closed" (NC) and "Normally Open" (NO) is instantaneous, regardless of how slowly the physical lever is pressed. This prevents **arcing**. ### C. Housing (The Shell) * **Thermoplastic (PBT/PPS):** The outer casing is made from heat-resistant, flame-retardant plastic. This provides high dielectric strength, ensuring the user is insulated from the internal voltage. --- ## 3. Terminal Configuration The device features three primary pins, which allow it to be used in different logic states: 1. **COM (Common):** The input terminal where the power source is connected. 2. **NC (Normally Closed):** The circuit is active when the lever is at rest. 3. **NO (Normally Open):** The circuit completes only when the lever is depressed. --- ## 4. Common Applications Due to its robust design, the WMS2-1B-R/Q is frequently found in: * **Limit Switches:** To detect the position of a door or a machine arm. * **Safety Interlocks:** To cut power when a panel is removed. * **User Interface:** As a tactile button in industrial control panels. ---