The **MA13TAX-R** is a specific part number typically associated with an **Electromagnetic Sounder (Buzzer)**, often manufactured by companies like **Star Micronics** (or similar specialized acoustic component manufacturers). It is a surface-mount device (SMD) designed for high-reliability audio signaling. --- ### 1. Key Technical Specifications Below are the typical technical parameters for the MA13 series sounders: | Feature | Specification (Typical) | | :--- | :--- | | **Type** | Electromagnetic Transducer (Sounder) | | **Drive Type** | External Drive (requires an external oscillator) | | **Rated Voltage** | 3.0V - 5.0V | | **Operating Voltage** | 1.0V to 6.0V | | **Rated Current** | Max 70mA - 80mA | | **Sound Pressure Level (SPL)** | ~85dB at 10cm | | **Resonant Frequency** | ~2400Hz - 2730Hz | | **Mounting Type** | Surface Mount (SMD) | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 2. Physical Characteristics The "13" in the part number often refers to the physical size (approx. **12.8mm x 12.8mm**). * **Housing Material:** High-temperature plastic (LCP - Liquid Crystal Polymer) capable of withstanding lead-free reflow soldering. * **Port Location:** Side-opening or Top-opening (depending on the specific sub-variation). * **Terminals:** Gold-plated pads for improved conductivity and corrosion resistance. --- ### 3. Circuit Integration Since the MA13TAX-R is an **External Drive** transducer, it does not beep just by applying DC voltage. It requires a square wave signal (PWM) at its resonant frequency. #### Typical Driving Circuit To drive this component using a Microcontroller (MCU), a transistor circuit is recommended: ```c // Pseudo-code for MCU driving (PWM) // Target Frequency: 2730Hz (approx. 366 microseconds period) void beep_on() { setup_pwm(frequency = 2730, duty_cycle = 50%); } void beep_off() { stop_pwm(); } ``` --- ### 4. Part Number Breakdown (MA13TAX-R) * **MA:** Series prefix for Magnetic/Electromagnetic sounders. * **13:** Frame size (12.8mm - 13mm). * **T:** Tape and Reel packaging. * **A/X:** Specific acoustic tuning or terminal configuration. * **-R:** RoHS compliant (Lead-free). --- ### 5. Common Applications * **Medical Devices:** Alarms for portable monitors. * **Industrial Equipment:** User interface feedback (key clicks or error beeps). * **Consumer Electronics:** Household appliances (microwaves, washing machines). * **Security Systems:** Tamper alerts or status indicators.