Piezo Buzzer 9*5.5mm

Piezo Buzzer 9*5.5mm

Enhance your project with this high-quality Piezo Buzzer 9*5.5mm. Suitable for makers, hobbyists, students, engineers and repair technicians. Designed for reliable performance in electronics, Arduino, IoT, automation and robotics applications. Easy to integrate into new or existing projects and ideal for educational, commercial or personal use.

Physical Dimensions

• Diameter: 9mm
• Height: 5.5mm
• Pin Pitch: ~4mm (center-to-center)

Electrical & Acoustic Characteristics

• Operating Voltage: Typical 3-5 V DC
• Current Draw: Around 20—90mA depending on model; typical electromagnetic needs ~80mA @ rated voltage
• Resonant Frequency: 2.7—2.8kHz (2,500—2,800Hz)
• Sound Pressure Level (SPL): 80—85dB @ 10cm

Environmental Specs

• Operating Temperature: —20°C to +70°C (common for small electromechanical buzzers)
• Storage Temperature: Similar typical range (—20→+70°C)

Examples & Available Part Models

• AATC AC903QLF (EM, 3VAC, 2.731kHz, 80mA, 82dB) — Popular 9×5.5mm electromagnetic buzzer
• AATC AX905P3 (3VDC, 2.7kHz, 80dB @ 10cm, ~30mA) — Another common through-hole version
• FBPT9055 Piezo Transducer (passive, 5V, 2mA, 80dB, ~4kHz) — Higher frequency resonator alternative

Summary Table

Applications

This compact piezo buzzer is ideal for:

• Audible alerts in electronics (Arduino, Raspberry Pi, microcontrollers)
• Alarm panels, timers, industrial indicators
• Portable devices and toys requiring small-footprint sound output