Product description
Passive piezo buzzer with PCB pins. A passive piezo buzzer contains only a piezoelectric transducer and has no built-in oscillator. It must therefore be driven by an alternating signal to produce sound, for example a square wave (PWM) from a microcontroller or an external oscillator. Applying DC voltage normally produces only a short click when the voltage is connected or disconnected. A piezoelectric element converts mechanical energy into electrical energy and vice versa through the piezoelectric effect. It can therefore be used both as a sound transducer (buzzer) and as a sensor.
The buzzer has a resonant frequency of 4 kHz, where it produces its highest sound output. At a drive voltage of 5 Vp-p and a 4 kHz square wave, it produces a sound level of at least 85 dB measured at a distance of 10 cm.
Specifications:
- Model: S&S SFN-1407PA7.6
- Resonant frequency: 4 kHz
- Sound output: ≥85 dB (10 cm, 5 Vp-p, 4 kHz square wave)
- Operating voltage (max): 30 Vp-p
- Current consumption: ≤5 mA
- Capacitance: 12 nF ±30% (at 1 kHz)
- Housing material: Black PBT
- Operating temperature: -40 °C to +105 °C
- Dimensions: Ø14 × 7.0 mm
- Pin spacing: 7.6 mm