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.
Reviews
There are no reviews yet.