TMB‑12A03 Active Magnetic Buzzer – 3 V DC, 12 mm Diameter, PCB Mount Piezo Indicator

The TMB‑12A03 is an active magnetic buzzer designed to provide consistent and audible tone generation when powered with a DC voltage source. With a compact 12 mm diameter and PCB-mountable design, it is ideal for space-limited embedded systems, alarm circuits, and notification applications. This piezoelectric indicator integrates an internal oscillator, eliminating the need for external signal driving circuitry. It operates at a rated voltage of 3 V DC and produces a stable tone output suitable for various alert and status indication applications.

Key Features:

• Rated Voltage: 3 V DC for low-power operation
• Sound Output: Typical 85 dB at 10 cm distance
• Compact Size: 12 mm diameter x ~9.5 mm height
• Mounting Type: PCB mount with two-pin configuration
• Mounting Type: PCB mount with two-pin configuration
• Operating Frequency: Approximately 2.7 kHz