The **CSS-613D** is a specialized electronic component, typically categorized as a **Surface Mount Device (SMD) Magnetic Transducer** or an electromagnetic buzzer. It is widely used in telecommunications, handheld electronics, and alarm systems due to its small footprint and reliable sound output. --- ### 1. Key Technical Specifications The following table outlines the typical electrical and physical parameters of the CSS-613D: | Parameter | Value / Specification | | :--- | :--- | | **Type** | Electromagnetic (Magnetic) Transducer | | **Rated Voltage** | 3.0 V (Typical range: 2.0V - 5.0V) | | **Current Consumption** | Max 100 mA | | **Coil Resistance** | 12 ± 3 $\Omega$ | | **Sound Pressure Level (SPL)** | $\geq$ 85 dB (at 10cm distance) | | **Resonant Frequency** | 2700 Hz - 3200 Hz | | **Mounting Type** | SMD (Surface Mount Device) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Core Electronic Composition The CSS-613D consists of four primary internal sub-components that work together to create sound: 1. **Magnet & Voice Coil:** The heart of the device. When an oscillating current passes through the coil, it creates a fluctuating magnetic field. 2. **Vibrating Diaphragm:** A thin metal plate (often iron or a specific alloy) that reacts to the magnetic field. 3. **Housing Case:** Usually made of High-Temperature Plastic (LCP or PPS) to withstand SMT reflow soldering processes. 4. **Terminals:** Gold-plated or tin-plated pads for soldering directly onto a PCB. --- ### 3. Driving Circuit Requirements Unlike a "piezo buzzer" with a built-in oscillator, the CSS-613D is a **transducer**. This means it requires an external driving circuit to generate sound. #### Example NPN Driving Circuit To drive this component using a Microcontroller (like an Arduino or ESP32), a transistor is required to handle the current: ```cpp // Basic PWM logic to drive the CSS-613D void setup() { pinMode(9, OUTPUT); // Connect to base of NPN transistor } void loop() { tone(9, 2730); // Send 2.7kHz frequency (Resonant frequency) delay(1000); noTone(9); delay(1000); } ``` --- ### 4. Comparison: CSS-613D vs. Piezo Buzzers | Feature | CSS-613D (Electromagnetic) | Piezoelectric Buzzer | | :--- | :--- | :--- | | **Voltage** | Low (3V - 5V) | High (3V - 30V) | | **Current** | High (Up to 100mA) | Low ( < 10mA) | | **Tone Quality** | Deep, Richer sound | Sharp, Piercing sound | | **Size** | Small/Compact | Can be large |