The part number **W2DYS-24B4-R2/UL** refers to a high-precision, industrial-grade **micro-switch** or **limit switch**, typically manufactured by companies specializing in precision electro-mechanical components (such as Honeywell or similar industrial suppliers). Below is a breakdown of its technical specifications and electronic characteristics. --- ### 1. Technical Specifications Table | Feature | Specification | Description | | :--- | :--- | :--- | | **Component Type** | Micro-switch / Limit Switch | Miniature snap-action switch | | **Actuator Type** | Pin Plunger / Lever | Depends on specific sub-assembly (usually pin) | | **Voltage Rating** | 24V DC / 125V-250V AC | Rated for both low voltage and mains control | | **Current Rating** | 1A to 5A | Varies based on load type (inductive vs. resistive) | | **Terminal Type** | Solder or Quick-connect | Designed for PCB or wire harness integration | | **Safety Standard** | UL (Underwriters Laboratories) | Fully certified for North American safety standards | | **Operating Force** | 1.47 N (typical) | High sensitivity for precise detection | --- ### 2. Key Electronic Features #### A. Snap-Action Mechanism This part utilizes a "snap-action" mechanism, meaning the transition of the contacts happens at a constant speed regardless of the speed of the actuator. This reduces arcing and ensures a reliable electrical connection over a long lifespan. #### B. Contact Configuration Typically, these switches are configured as **SPDT (Single Pole Double Throw)**: * **Common (C):** The input terminal. * **Normally Open (NO):** The circuit is open until the switch is pressed. * **Normally Closed (NC):** The circuit is closed until the switch is pressed. #### C. Environmental Sealing The "R2" designation often refers to a specific revision or environmental protection rating. These switches are frequently used in environments requiring resistance to dust or light moisture (though not always fully waterproof). --- ### 3. Common Applications Due to its UL certification and precision, this part is found in: 1. **Industrial Automation:** Detecting the position of machine arms or safety gates. 2. **HVAC Systems:** Airflow proving switches or damper position feedback. 3. **Medical Equipment:** Door interlocks or fluid level detection. 4. **Gaming/Vending:** Coin detection or button interfaces. ---