The **W2SP-1C3-R2/UL** is a specific model of an **electromagnetic power relay**, typically manufactured by companies like **Weg** or as part of specialized industrial control series. It is designed to switch high-current loads in industrial automation and control systems. Below is a breakdown of its electronic specifications and characteristics. ### 1. Technical Specifications | Feature | Specification | | :--- | :--- | | **Contact Form** | 1C (SPDT - Single Pole Double Throw) | | **Coil Voltage** | Typically 24V DC or 110/220V AC (Varies by R2 suffix) | | **Contact Rating** | Usually 10A to 16A @ 250VAC / 30VDC | | **Mounting Type** | Plug-in (Socket) or PCB Mount | | **Termination** | Blade or Solder pins | | **Safety Certification** | UL (Underwriters Laboratories) Recognized | --- ### 2. Breakdown of the Model Code The alphanumeric string provides specific details about the part's build: * **W2SP**: The series designation (General Purpose / Industrial Relay). * **1C**: Indicates the contact configuration. "1C" means it has one set of Changeover contacts (1 Common, 1 Normally Open, 1 Normally Closed). * **3**: Often denotes the casing style (e.g., Flux-proof or Sealed). * **R2**: Refers to specific electrical features, such as a **built-in LED indicator** or a **protection diode/varistor** for surge suppression. * **UL**: Signifies that the component meets North American safety standards for industrial equipment. --- ### 3. Key Electronic Components & Functions 1. **Electromagnetic Coil:** When energized, it creates a magnetic field that pulls the armature to switch the contacts. 2. **Contacts (Silver Alloy):** Usually made of Silver Nickel (AgNi) or Silver Tin Oxide (AgSnO2) to resist electrical arcing and welding during high-current switching. 3. **Mechanical Indicator:** Many "R2" series relays include a small mechanical flag or a LED to visually confirm if the relay is active. 4. **Insulation Barrier:** High-dielectric strength material between the coil and contacts to prevent high-voltage leakage into the control circuit. --- ### 4. Common Applications * **PLC Outputs:** Interfacing low-power PLC signals to high-power motors or heaters. * **HVAC Systems:** Controlling fans and compressors. * **Industrial Panels:** General logic and signal isolation. ---