The **SES-2A0-R** is a specific electronic component primarily categorized as an **Electromagnetic Buzzer** (Siren/Transducer), often utilized in security systems, industrial equipment, and notification devices. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications The SES-2A0-R is designed for high-decibel output with low power consumption. It is typically a **Piezoelectric or Magnetic** sounder depending on the specific series iteration. | Feature | Description | | :--- | :--- | | **Component Type** | Electronic Audible Signal / Buzzer | | **Operating Voltage** | Typically 6V - 12V DC | | **Current Consumption** | Low (usually < 30mA at rated voltage) | | **Sound Pressure Level (SPL)** | ~85dB to 105dB at 30cm | | **Frequency** | 2.5kHz - 3.5kHz (Standard Alert Tone) | | **Mounting Type** | Through-hole (PCB Mount) or Flange Mount | --- ### 2. Internal Electronic Construction The device consists of three primary stages: 1. **Oscillator Circuit:** Most "R" suffix models (Self-Drive) include an internal transistorized oscillator. When DC voltage is applied, the circuit automatically creates the frequency needed to vibrate the diaphragm. 2. **Piezoelectric Element / Coil:** * If **Piezo**: Uses a ceramic disc that expands and contracts with voltage. * If **Magnetic**: Uses a voice coil and magnet to move a metal diaphragm. 3. **Resonance Chamber:** The plastic housing is engineered as an acoustic cavity to amplify the sound waves produced by the internal element. --- ### 3. Pinout and Connectivity The "R" in the part number often signifies **RoHS Compliance** or a specific **Resonant** frequency type. * **Positive (+) Lead/Pin:** Connected to the DC supply (VCC). * **Negative (-) Lead/Pin:** Connected to the Ground (GND). * **Polarity Protection:** Usually includes a basic diode or is built to withstand minor reverse polarity, though direct DC orientation is required for operation. --- ### 4. Key Application Circuits To integrate the SES-2A0-R into a project, it is usually driven by a Microcontroller (like an Arduino) via a switching transistor. ```cpp // Example: Basic Arduino Trigger Code int buzzerPin = 9; void setup() { pinMode(buzzerPin, OUTPUT); } void loop() { digitalWrite(buzzerPin, HIGH); // Sound ON delay(1000); digitalWrite(buzzerPin, LOW); // Sound OFF delay(1000); } ``` --- ### 5. Environmental & Reliability Data * **Operating Temperature:** -20°C to +70°C. * **Housing Material:** ABS Plastic (Flame Retardant). * **Compliance:** RoHS Compliant (Lead-free).