The **SMA3VG-CC2-R** is a specific model of an **SMD (Surface Mount Device) Buzzer**, typically categorized as a piezoelectric acoustic indicator. This component is designed to provide audible feedback in compact electronic devices. --- ### 1. Key Technical Specifications Below are the typical electrical and mechanical parameters for this component: | Feature | Specification | | :--- | :--- | | **Type** | Piezoelectric Indicator (Internal Circuitry) | | **Mounting Type** | Surface Mount (SMD) | | **Operating Voltage** | 3.0V - 7.0V DC | | **Rated Voltage** | 5.0V DC | | **Current Consumption** | Max 30mA | | **Sound Pressure Level (SPL)** | ~80 dB at 10cm | | **Resonant Frequency** | 2,700 Hz ± 300 Hz | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Functional Characteristics #### A. Internal Drive Circuit Unlike "transducers" which require an external oscillating signal, the **CC2** designation usually indicates that this is an **indicator**. It contains internal circuitry that generates the frequency; you only need to apply a DC voltage to trigger the sound. #### B. Piezoelectric Technology It utilizes a ceramic piezoelectric element. When voltage is applied, the material deforms mechanically, creating pressure waves in the air (sound). This technology is preferred over electromagnetic versions for: * Lower power consumption. * Higher frequency output. * Thinner profile. #### C. Environmental Protection The **-R** suffix often denotes **RoHS compliance**, meaning the part is manufactured without hazardous substances like lead or mercury, and is suitable for lead-free soldering processes. --- ### 3. Pinout and Physical Layout The device is generally housed in a small square plastic casing (LCP material) to withstand high-temperature reflow soldering. * **Positive (+) Terminal:** Usually marked with a chamfered corner or a "+" symbol on the casing. * **Negative (-) Terminal:** Connected to the system ground. * **Sound Port:** A small hole on the top or side through which the sound waves escape. --- ### 4. Common Applications Due to its small footprint and 5V operation, it is widely used in: 1. **Handheld Devices:** For button-press confirmation or low-battery alerts. 2. **Medical Instrumentation:** For status alarms. 3. **Industrial Controllers:** To signify error states or process completion. 4. **Consumer Electronics:** Microwave timers, washing machine alerts, etc.