The **SVB-5WC-R/Q** refers to a specific series of high-performance **Electromagnetic Buzzers** (specifically Surface Mount Devices or SMD) often used in consumer electronics and automotive signaling. Below is the technical breakdown of the electronic components and characteristics of this part. --- ### 1. General Specifications These components are designed to convert electrical signals into audible sound via electromagnetic induction. | Property | Typical Value / Specification | | :--- | :--- | | **Type** | Electromagnetic / Magnetic Transducer | | **Mounting Type** | SMD (Surface Mount Device) | | **Rated Voltage** | 5.0 Vp-p | | **Operating Voltage** | 3.0 ~ 7.0 Vp-p | | **Rated Current** | Max 80 mA | | **Sound Pressure Level (SPL)** | Min 85 dB (at 10cm distance) | | **Resonant Frequency** | 2,700 Hz (approx.) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Internal Electronic Construction The SVB-5WC series consists of several key internal parts: 1. **The Coil:** A copper winding that creates a magnetic field when current flows through it. 2. **The Magnet:** A permanent magnet that provides a bias field. 3. **The Diaphragm:** A thin metal plate (often iron) that is pulled by the magnetic field and released, creating sound waves. 4. **Housing:** A heat-resistant LCP (Liquid Crystal Polymer) plastic case designed to withstand Reflow Soldering temperatures. --- ### 3. Application Circuit (Example) Since this is a **transducer** (and not a "self-drive" indicator), it requires an external oscillating circuit to produce sound. You cannot simply apply constant DC voltage to it. ```c // Example Pseudocode for driving the buzzer using PWM void setup() { pinMode(BUZZER_PIN, OUTPUT); } void loop() { tone(BUZZER_PIN, 2700); // Generate 2.7kHz square wave delay(500); // Beep for 0.5s noTone(BUZZER_PIN); // Silence delay(500); } ``` --- ### 4. Key Features & Usage * **Reflow Compatibility:** The "R" in the suffix often denotes "Tape and Reel" packaging suitable for automated pick-and-place machines and reflow soldering. * **Small Footprint:** Highly compact, making it ideal for portable medical devices, handheld scanners, and automotive dashboards. * **Reliability:** Because it uses magnetic induction rather than piezo crystals, it is often more durable in high-vibration environments. ---