10PCS Active Piezo Buzzer TMB12A 12mm – 3V 5V 12V DC

$8.71 $10.16

10-Pack Active Piezo Buzzers – TMB12A Series (12×9.5mm)

Get reliable, consistent audio signals for your next electronics project with this 10-pack of TMB12A Active Piezo Buzzers. These compact, self-driven buzzers produce a continuous long-tone sound simply by applying DC voltage — no external oscillator circuit required. Perfect for hobbyists, engineers, and makers alike.

Made in Mainland China.

Key Specifications

Model: TMB12A
Dimensions: 12mm diameter × 9.5mm height
Operating Voltage: 3V, 5V, or 12V DC
Type: Active (self-oscillating) piezo buzzer
Sound Type: Continuous long tone
Material: ABS plastic
Color: Black
Certification: CE
Quantity: 10 pieces per pack

What Makes These Buzzers Stand Out?

Active / Self-Driven: Simply connect DC power and they buzz — no additional driver circuit needed.
Wide Voltage Range: Compatible with 3V, 5V, and 12V systems, making them versatile for Arduino, Raspberry Pi, and other microcontroller platforms.
Compact Form Factor: At just 12mm in diameter, these fit easily into tight PCB layouts and enclosures.
Durable ABS Construction: Sturdy plastic housing built to last through repeated use.
Great Value Pack: 10 buzzers in one order — ideal for prototyping, classroom projects, and stocking your parts bin.

Applications

These active buzzers are ideal for a wide range of DIY and professional electronics uses, including:

Alarm and alert systems
Computers and printers (status indicators)
DIY Arduino / microcontroller projects
Electronic toys and models
Timer and notification circuits
Home automation systems

What's in the Box?

10 × TMB12A Active Piezo Buzzers

Related Products You May Like

If you enjoy electronics and DIY projects, check out these related items:

Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What is the difference between an active buzzer and a passive buzzer?

A: An active buzzer like the TMB12A contains a built-in oscillator circuit, so it produces sound automatically when DC voltage is applied — no additional signal or driver is needed. A passive buzzer requires an external PWM signal to generate sound and gives you more control over tone/frequency. For simple alarm or notification functions, active buzzers are the easier plug-and-play choice.

Q: Are these buzzers compatible with Arduino and Raspberry Pi?

A: Yes! The TMB12A buzzers support 3V, 5V, and 12V DC operation, making them fully compatible with Arduino (5V), Raspberry Pi (3.3V–5V), and most common microcontroller development boards. Just connect the positive pin to your power output and the negative pin to ground.

Q: Can I use these buzzers in alarm systems or DIY projects?

A: Absolutely. These active piezo buzzers are designed for use in alarms, alert circuits, electronic models, toys, computers, printers, and a wide range of DIY electronics projects. Their compact 12mm size and wide voltage range make them very versatile for both prototyping and finished products.