SFM-27 Active Buzzer 3V-24V 95dB High-Decibel Electronic Alarm for Arduino DIY Projects

Description SFM-27 Active Buzzer 3V-24V 95dB High-Decibel Electronic Alarm for Arduino DIY Projects Loud Active Buzzer with Built-In Oscillator for Alarm & Alert Systems The SFM-27 Active Buzzer is a high-decibel electronic buzzer designed for alarms, warning systems, Arduino projects, automation equipment, and DIY electronics. With an operating voltage range of 3V to 24V, this versatile buzzer is easy to use and delivers a powerful 95dB sound output for clear alerts and notifications. Because it is an active buzzer, it has a built-in oscillator, meaning it produces sound simply by applying DC power—no external tone generation required. Key Features Active buzzer with built-in oscillator Loud 95dB sound output at 10cm Wide operating voltage: 3V – 24V DC Rated voltage: 12V Low current consumption: 20mA max Easy 2-wire connection Compact design with mounting holes Ideal for alarms, indicators, Arduino and DIY projects Reliable intermittent beep alarm sound Suitable for industrial and hobby use Technical Specifications Feature Specification Model SFM-27 Type Active Buzzer Color White Rated Voltage 12V DC Operating Voltage 3V – 24V DC Max Current 20mA Sound Output 95dB at 10cm Resonant Frequency 3100 ± 500 Hz Operating Temperature -20°C to 80°C Diameter 29mm Height 15mm Mounting Hole Distance 40mm Wire Length 105mm What is an Active Buzzer? An active buzzer contains an internal oscillator circuit. Simply connect power: Positive wire to VCC Negative wire to GND The buzzer immediately produces sound without needing PWM or audio signals. Ideal Applications Security Alarm Systems Arduino Projects Home Automation Alerts Warning Indicators Industrial Equipment Timer Alerts Battery Low Voltage Warning DIY Electronics Projects Robotics Sound Alerts Why Choose SFM-27 Active Buzzer? The SFM-27 buzzer is perfect when you need a loud, reliable, and simple alarm device. Benefits include: Easy plug-and-play operation Loud attention-grabbing sound Works on multiple voltages Low power usage Compact and easy to mount Package Includes 1 x SFM-27 Active Buzzer Important Notes DC power only Observe correct polarity when wiring Continuous operation may be loud in enclosed spaces Product color may vary slightly by batch Buy SFM-27 Active Buzzer Today Add powerful sound alerts to your project with the SFM-27 High-Decibel Active Buzzer 3V-24V. Perfect for Arduino, alarm systems, and DIY electronics.