The **API-4260-LW150-R** is a specialized audio component, specifically a **Piezoelectric Audio Indicator (Buzzer)** manufactured by PUI Audio. It is designed for high-output audible signaling in industrial, medical, and security applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Type** | Piezo Indicator (Internal Circuitry) | | **Operating Voltage** | 4 ~ 28 VDC | | **Rated Voltage** | 12 VDC | | **Sound Pressure Level (SPL)** | 95 dB @ 12V, 30cm | | **Resonant Frequency** | 2,800 Hz ± 500 Hz | | **Current Consumption** | 8 mA (at rated voltage) | | **Tone Type** | Continuous | | **Mounting Type** | Panel Mount (with Flanges) | | **Termination** | 150mm Lead Wires (LW150) | --- ### 2. Breakdown of the Model Name Understanding the nomenclature helps in identifying its physical characteristics: * **API**: Audio Piezo Indicator (contains internal driving circuitry). * **4260**: Physical dimensions (approx. 42mm diameter, 60mm height/style category). * **LW150**: Indicates **L**ead **W**ires with a length of **150mm**. * **R**: RoHS Compliant. --- ### 3. Electronic Characteristics * **Internal Drive Circuitry:** Unlike a "transducer" which requires an external AC signal or PWM to function, this "indicator" has a built-in oscillator. Applying a simple DC voltage (within the 4-28V range) will trigger the sound. * **Piezoelectric Element:** It utilizes a ceramic disc that deforms when voltage is applied. This technology is highly efficient, drawing very low current (8mA) compared to electromagnetic buzzers. * **Voltage Sensitivity:** The loudness (SPL) is directly proportional to the input voltage. At 4V, the sound will be faint; at 28V, it reaches its maximum intensity. --- ### 4. Implementation Example To integrate this into a circuit (e.g., with an Arduino or Microcontroller), you typically use a transistor as a switch because the buzzer may operate at a higher voltage than the logic pins. ```cpp // Simple activation logic (Conceptual) int buzzerPin = 9; // Connected to a MOSFET or Transistor base void setup() { pinMode(buzzerPin, OUTPUT); } void loop() { digitalWrite(buzzerPin, HIGH); // Buzzer turns ON (Continuous Tone) delay(1000); // Sound for 1 second digitalWrite(buzzerPin, LOW); // Buzzer turns OFF delay(1000); } ``` --- ### 5. Common Applications * **Control Panels:** High-volume alerts for industrial machinery. * **Security Systems:** Audible sirens for alarm triggers. * **Marine/Outdoor Equipment:** Due to its robust piezo construction and wide operating voltage. ---