Buzzer brzęczyk piezoelektryczny SFM-20B 3-24V sygnał ciągły do Arduino

Piezoelectric Buzzer SFM-20B 3-24V

Compact and efficient SFM-20B piezoelectric buzzer designed for electronic projects, alarm systems, and audible notifications. The module produces a continuous acoustic signal with a sound level above 95 dB, making it clearly audible in various environments. A wide supply voltage range from 3V to 24V DC ensures easy integration with popular microcontroller systems. The product is an excellent choice for Arduino, ESP8266, ESP32, and Raspberry Pi.

Key technical features

• Type: piezoelectric buzzer
• Signal type: continuous
• Supply voltage: 3-24V DC
• Rated current: 10 mA
• Volume: above 95 dB
• Sound frequency: 3900 Hz ±500 Hz
• Diameter: 23 mm
• Operating temperature: from -20°C to +60°C
• Weight: 7 g

Example applications

The module is widely used in hobby and professional electronics. It works well in many different project scenarios:

• Audible signaling in alarm and warning systems
• Notifications about the operating status of electronic devices
• Prototyping circuits on breadboards
• Indicators in home appliances and industrial equipment
• Educational projects and learning microcontroller programming
• Notification modules in smart home systems

Benefits of choosing the SFM-20B

Power supply versatility - operation across a wide voltage range simplifies choosing a power source and working with different circuits.

High volume - a signal above 95 dB is clearly audible even in demanding acoustic conditions.

Low current draw - current consumption of only about 10 mA allows safe use in battery-powered devices.

Compact dimensions - a 23 mm diameter enables mounting in enclosures with very limited space.

Easy implementation - simple wiring allows quick integration without complex driver circuits.