Description
🔍 Technical Specifications
-
Model: TMB12A03
-
Type: Active/emitter buzzer (built‑in oscillator)—beeps continuously when DC voltage is applied
-
Rated Voltage: 3 V DC (operable within 1.5–4 V DC range)
-
Rated Current: typically, < 30 mA (25 mA max according to some sources)
-
Sound Pressure Level (SPL): ~85 dB at 10 cm (variously 82–85 dB reported)
-
Frequency: ~2.3 kHz (2,300 ±300 Hz)
-
Dimensions: ~12 mm diameter, ~9.5–9.8 mm height, pin pitch ~7.6 mm
-
Operating Temperature: –20 °C to +70 °C
-
Mounting: Through‑hole with two straight leads—breadboard/PCB friendly
🧠 Behavior & Usage
-
The active buzzer has an internal oscillating circuit, so applying a constant DC voltage (3 V) results in a continuous tone—no external PWM needed
-
Arduino forum advice:
“The TMB12A03 is an active buzzer. You shouldn’t pulse it. Apply a constant DC voltage to activate the buzzer.”
📊 Quick Comparison Table
| Parameter | Value |
|---|---|
| Operating voltage | 1.5–4 V DC (nominal 3 V DC) |
| Current draw | < 30 mA (up to 25 mA typical) |
| Tone frequency | 2,300 ± 300 Hz |
| Sound level | ~85 dB @10 cm |
| Size (D×H) | 12 mm × ~9.5 mm |
| Mounting | Through-hole (2-pin) |
| Temp. range | –20 °C to +70 °C |
✅ Applications
The TMB12A03 is ideal for any audible alert use-case, including:
-
Microcontroller alarms (Arduino, Raspberry Pi)
-
Security systems and smoke detectors
-
Toys, timers, appliances, industrial indicators
Reviews
There are no reviews yet.