The **M2AS1-4141-R2/CE** is a specialized electronic component, typically categorized as a **Surface Mount (SMT) Magnetic Buzzer** or an acoustic transducer. These components are designed to convert electrical signals into audible sound, commonly used in consumer electronics, automotive dashboards, and industrial equipment. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this part series, the electronic characteristics are generally as follows: | Feature | Specification (Typical) | | :--- | :--- | | **Type** | Magnetic / Electromagnetic | | **Mounting Type** | Surface Mount (SMD) | | **Rated Voltage** | 3.0V - 5.0V DC | | **Operating Voltage** | 2.0V ~ 6.0V DC | | **Sound Pressure Level (SPL)** | ≥ 85 dB (at 10cm distance) | | **Resonant Frequency** | ~2700 Hz to 4100 Hz | | **Rated Current** | Max 80mA - 100mA | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Physical Construction and Components The "4141" in the part number usually refers to its physical dimensions (e.g., 4.1mm x 4.1mm). The internal structure consists of: * **Coil:** A fine copper wire winding that creates an electromagnetic field when current passes through. * **Magnet:** A permanent magnet that interacts with the coil's field. * **Vibrating Diaphragm:** A metal disk that moves rapidly in response to the magnetic fluctuations, creating sound waves. * **Housing (LCP/PPS):** Heat-resistant plastic housing designed to withstand reflow soldering temperatures. --- ### 3. Circuit Integration Unlike "active" buzzers, this component is often a **transducer**, meaning it requires an external oscillating circuit to produce sound. #### Typical Driving Circuit To drive this component, a transistor (NPN or MOSFET) is used as a switch controlled by a Microcontroller (MCU) PWM signal. ```cpp // Example: Arduino PWM code to drive the buzzer void setup() { pinMode(9, OUTPUT); // Connect to NPN Transistor Base } void loop() { tone(9, 2700); // Send 2.7kHz square wave delay(500); noTone(9); delay(500); } ``` --- ### 4. Part Number Breakdown (Potential) * **M2AS:** Series identifier (Miniature Acoustic Surface-mount). * **4141:** Physical footprint size. * **R2:** Revision 2 or specific resistance/impedance rating. * **CE:** Compliance mark (Conformité Européenne) indicating it meets EU safety/environmental standards. --- ### 5. Application Areas * **Medical Devices:** Alarms and status indicators. * **Smart Home:** Feedback tones for thermostats or smart locks. * **Automotive:** Proximity alerts and turn signal clicks. * **Handheld Electronics:** Battery low indicators.