Campainha piezoelétrica INDEXA 33168 90 dB(A) para montagem em PCB, 3-28V DC, 3,5kHz, preta

Mount this compact piezo buzzer on a PCB to add a clear 90 dB(A) audible alert in industrial controls, alarm systems, or test equipment. Its internal oscillator produces a continuous 3.5 kHz tone from a 3-28V DC supply, drawing only 15 mA.

Key specifications

• Sound pressure level: 90 dB(A) at 30 cm
• Operating voltage: 3-28 V DC
• Current consumption: 15 mA max
• Resonant frequency: 3.5 kHz
• Tone type: continuous
• Drive type: internal (self-oscillating)
• Mounting: PCB through-hole, pin spacing 15 mm
• Diameter: 22 mm, height: 10 mm
• Operating temperature: -20 °C to 60 °C
• Housing colour: black
• Number of pins: 2

Why choose it

The integrated drive circuit simplifies design—no external oscillator needed. Its small footprint and standard pin spacing make it easy to place on dense boards.

Ideal use cases

• Industrial machine status indicators
• Security and fire alarm sounders
• Portable test and measurement devices
• Home appliance alerts

Good to know

Designed for through-hole soldering. Ensure the supply voltage stays within 3-28 V DC to maintain rated sound output.