The **M2AS1-5134-R2/CE** is a specialized electronic component, typically categorized as a **Surface Mount (SMT) Magnetic Buzzer** or an **Electromagnetic Transducer**. These parts are widely used in consumer electronics, automotive dashboards, and medical devices to provide acoustic feedback (beeps or alarms). --- ## 1. Technical Specifications The following table highlights the typical electrical and physical characteristics associated with this series: | Parameter | Typical Value | | :--- | :--- | | **Rated Voltage** | 3.0V ~ 5.0V DC | | **Operating Voltage** | 2.0V ~ 7.0V DC | | **Rated Current** | Max 80 - 100 mA | | **Sound Pressure Level (SPL)** | ≥ 85 dB (at 10cm distance) | | **Resonant Frequency** | 2700 Hz ± 300 Hz | | **Operating Temperature** | -40°C to +85°C | | **Mounting Type** | Surface Mount Device (SMD/SMT) | --- ## 2. Key Electronic Features ### Internal Construction * **Coil and Magnet:** Unlike piezo buzzers that use ceramic disks, this is an **electromagnetic** type. It consists of a copper coil and a permanent magnet. When current flows through the coil, it creates a magnetic field that moves a metal diaphragm to generate sound. * **Driving Circuit:** This specific model is often a "transducer" type, meaning it **does not** have a built-in oscillation circuit. You must provide an external square wave signal at the resonant frequency to make it sound. ### Material & Compliance * **Housing:** High-temperature plastic (usually LCP or PPS) designed to withstand **Reflow Soldering** temperatures (approx. 260°C). * **Compliance:** The "CE" suffix typically indicates compliance with European safety, health, and environmental protection standards. --- ## 3. Circuit Integration Example To drive this component using a microcontroller (like an Arduino or ESP32), a simple transistor circuit is required because the current draw (up to 100mA) is too high for a standard GPIO pin. ```cpp // Example: Driving the buzzer at its resonant frequency void setup() { pinMode(9, OUTPUT); // Buzzer connected to pin 9 via transistor } void loop() { tone(9, 2700); // Send 2700Hz square wave delay(500); // Beep for 0.5 seconds noTone(9); // Silence delay(500); } ``` --- ## 4. Application Areas * **Automotive:** Turn signal indicators or seatbelt reminders. * **Medical:** Patient monitoring alarms. * **Consumer:** Microwave oven timers or POS terminal feedback.