95dB Electronic Buzzer 3–24V SFM-27 | Arduino Alarm Beeper
95dB Electronic Buzzer 3–24V SFM-27 | Arduino Alarm Beeper
95dB High-Decibel Electronic Buzzer – SFM-27 / HYT-3015
This compact yet powerful electronic buzzer delivers a loud, continuous 95dB beep tone across a wide operating voltage range of 3V to 24V (including standard 12V systems). Compatible with Arduino and other microcontroller platforms, it is an ideal component for DIY alarm circuits, notification systems, project enclosures, and prototyping boards.
Key Features
- 95dB Output: Produces a strong, attention-grabbing continuous beep tone suitable for alarms and alerts.
- Wide Voltage Range (3–24V): Works seamlessly with 3.3V logic boards, 5V Arduino setups, 12V automotive circuits, and up to 24V industrial systems.
- Model SFM-27 / HYT-3015: Industry-standard form factor, easy to source replacement or use as a direct substitute.
- Continuous Beep Operation: Emits a steady tone when powered — no additional oscillator circuit needed.
- Compact Design: Small footprint makes it easy to integrate into enclosures, PCBs, and breadboard setups.
- Arduino Compatible: Plug directly into your Arduino, Raspberry Pi, or any compatible microcontroller project.
Specifications
| Specification | Details |
|---|---|
| Type | Electronic Buzzer (Active / Continuous Beep) |
| Model Number | SFM-27 / HYT-3015 |
| Operating Voltage | 3V – 24V DC (12V typical) |
| Sound Output | 95dB |
| Quantity | 1 PCS |
| Country of Origin | Made in China |
Great For
- Arduino & Raspberry Pi alarm projects
- DIY security and notification circuits
- Home automation systems
- Prototype PCB builds and maker projects
- Automotive and industrial 12V alarm systems
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Frequently Asked Questions
Q: Is this an active or passive buzzer, and do I need extra components?
A: This is an active (self-driven) electronic buzzer. It produces a continuous beep tone as soon as power is applied — no external oscillator or additional circuitry is required. Simply connect it to a power source within the 3–24V range and it will sound immediately.
Q: Is the SFM-27 buzzer compatible with Arduino?
A: Yes. The SFM-27 electronic buzzer is fully compatible with Arduino, Raspberry Pi, and most microcontroller platforms. It operates at 3.3V and 5V logic levels, making it a convenient drop-in component for your alarm or notification project.
Q: Can this buzzer be used in a 12V automotive circuit?
A: Absolutely. The wide 3–24V operating voltage range includes standard 12V automotive systems, making this buzzer suitable for vehicle alarm circuits, indicator systems, and other 12V electronics applications.
Q: How loud is 95dB — will it be heard clearly?
A: 95dB is roughly equivalent to the sound level of a loud power tool or motorcycle at close range. It is strong enough to serve as an effective audible alert in most indoor and outdoor applications.