TMB12A12 12V Active Buzzer Module 12095

Description

The TMB12A12 Active Buzzer Module is a robust, high-performance electromagnetic sound generator designed for 12V DC applications requiring clear audible alerts, alarms, and status feedback. Housed in a standard 12mm × 9.5mm cylindrical package (12095 form factor), this active buzzer features a built-in driving circuit, meaning it produces a fixed-frequency tone simply by applying a DC voltage within its operating range — no external PWM signal, tone generator, or complex driver circuitry is required .

At the heart of the TMB12A12 is an electromagnetic driving mechanism with an integrated oscillator module. When a DC voltage between 8V and 16V is applied across its two pins, the internal circuit generates an alternating current that drives the electromagnetic coil. This creates a cyclic magnetic field that causes the internal diaphragm to vibrate at a fixed resonant frequency of 2.3kHz to 2.4kHz, producing a clear, continuous tone . The sound pressure level reaches 85dB at 10cm when driven at the rated 12V, making it suitable for industrial, automotive, and indoor alert applications .

The TMB12A12 is specifically designed for 12V systems, making it ideal for automotive electronics, industrial control panels, security systems, and equipment that operates from 12V power rails . Its low current consumption of approximately 30mA is suitable for battery-backed and energy-conscious designs . The buzzer features a 2-pin through-hole (DIP) package with standard pin spacing, making it easy to mount on breadboards and PCBs. The positive pin is marked on the housing, and the polarity must be observed during connection — incorrect polarity may damage the component.

The TMB12A12 is widely used in industrial equipment alarms, automotive warning systems, security alarm panels, instrumentation, medical devices, household appliances, and educational STEM projects . It is also a popular choice for Arduino and DIY projects where a simple 12V-compatible audible indicator is required.

Important Note: The TMB12A12 is an active buzzer — it produces a fixed tone when powered and cannot play melodies or variable frequencies. For variable tones, use a passive buzzer with PWM control instead. When driving directly from a microcontroller GPIO pin, note that the buzzer may draw up to 30mA, which exceeds the safe continuous current rating of many MCU pins (typically 20mA). For reliable operation, use an NPN transistor as a low-side switch to isolate the buzzer from the MCU . The buzzer is an open-frame design and is not waterproof — avoid exposure to moisture, corrosive gases, and direct contact with water.

Features

• Active buzzer with built-in driving circuit — Produces sound directly from DC voltage; no PWM required

• 12V operation — Rated 12V, operating range 8V–16V; ideal for automotive and industrial systems

• Fixed 2.3kHz–2.4kHz tone — Clear, stable continuous sound for alarms and notifications

• 85dB sound pressure — Loud enough for industrial and automotive alert applications

• Low current consumption — Approximately 30mA, suitable for battery-backed designs

• Compact 12×9.5mm package — Standard 12095 form factor for easy PCB integration

• 2-pin through-hole mounting — Simple breadboard and PCB installation

• Clear polarity marking — Positive pin indicated on housing

• Wide application range — Industrial equipment, automotive, security panels, instrumentation, medical devices

• Cost-effective — Affordable solution for audible indication in volume production

Technical Specifications