The SFM-27 Electronic Active Buzzer is a compact and reliable sound alert device designed for a wide range of electronic applications. It produces a loud, clear continuous beep when powered, making it ideal for alarms, indicators, security systems, and DIY electronics projects.

With a built-in oscillation circuit, this active buzzer requires no external driver, allowing for simple plug-and-play operation. Just apply DC voltage and it immediately generates a stable audible tone.

Technical Specifications

• Model: SFM-27
• Type: Active electronic buzzer
• Sound Type: Continuous tone
• Operating Voltage: 324V DC
• Rated Voltage: 12V DC
• Sound Level: 9095 dB (at 10 cm)
• Frequency: ~3 kHz
• Current Consumption: 2030mA
• Material: ABS plastic housing
• Operating Temperature: -20C to +80C
• Mounting: Panel/PCB compatible