The **W2AP-A13-R/UL** is a specialized electronic component commonly used in industrial automation and control systems. It is primarily categorized as an **Electromagnetic Buzzer/Siren** or an **Acoustic Signaling Device**, often manufactured by companies like **Waco** or similar industrial hardware providers. --- ### 🛠️ Technical Specifications & Attributes | Feature | Specification | | :--- | :--- | | **Component Type** | Electronic Piezo/Electromagnetic Buzzer | | **Operating Voltage** | Typically 110V - 220V AC (A13 variant) | | **Sound Level** | 80dB to 100dB at 1 meter | | **Mounting Style** | Panel Mount / Surface Mount | | **Certification** | UL Listed (Underwriters Laboratories) | | **RoHS Compliant** | Yes (indicated by the 'R' suffix) | | **Tone Type** | Continuous or Intermittent (model dependent) | --- ### 🔍 Key Part Number Breakdown Understanding the nomenclature helps in identifying the specific electronic characteristics: 1. **W2AP**: Refers to the series/housing style (often a compact panel-mount design). 2. **A13**: Denotes the **Voltage Rating**. In many industrial codes, "A13" corresponds to high-voltage AC inputs (e.g., 110V/220VAC), making it suitable for control panels without needing a DC power supply. 3. **-R**: Stands for **RoHS Compliance**, indicating the part is manufactured without hazardous substances like lead. 4. **-UL**: Indicates the part has been tested and certified by **Underwriters Laboratories** for safety standards in the US and Canada. --- ### 💡 Electronic Functions & Applications The internal circuitry of the W2AP-A13-R/UL typically includes a built-in oscillator and a transducer. Because it is AC-rated, it contains a small rectifier or voltage dropper circuit to drive the acoustic element. * **Alarm Signaling:** Used in PLC (Programmable Logic Controller) outputs to notify operators of machine errors or cycle completions. * **Safety Warning:** Installed in environments where audible alerts are required for safety compliance. * **Durability:** Designed for high-duty cycles and resistance to vibration, common in factory floor environments. ---