Also composed of a piezo disc and resonant cavity, this transducer operates via an external circuit with a positive feedback loop to sustain resonance. It features a compact structure, low power usage, and quick response, and is widely used in alert systems and electronic notification devices.
| Image | Part Number | DiameterD [mm] | HeightH [mm] | SPL [dB] | FrequencyFreq [kHz] | Rated VoltageVoltage | Mounting |
|
EFM-390B | 24 | 8.3 | 90 | 3.8±0.5 | 12VDC | PIN |
|
EFM-390BA | 24 | 8.3 | 90 | 3.8±0.5 | 12VDC | PIN |
|
TFM-02D | 25 | 5 | 85 | 5.0±1.0 | 6VDC | LEAD WIRE |
|
TFM-12 | 28.5 | 7 | 83 | 3.0±0.5 | 12VDC | PIN |
|
TFM-16 | 33.5 | 8 | 82 | 2.6±0.5 | 12VDC | PIN |
|
TFM-24 | 31 | 11 | 75 | 3.0±0.5 | 12VDC | PIN |
|
TFM-24A | 31 | 11 | 75 | 3.0±0.5 | 12VDC | PIN |
|
TFM-26 | 40 | 14 | 85 | 3.2±0.3 | 12VDC | PIN |
|
TFM-28 | 30.6 | 16 | 95 | 3.4±0.5 | 9VDC | PIN |
|
TFM-30 | 30.6 | 16 | 95 | 3.4±0.5 | 9VDC | PIN |
|
TFM-32 | 24 | 11 | 90 | 3.5±0.5 | 10VDC | PIN |
|
TFM-36 | 39 | 16 | 106 | 3.2±0.3 | 12VDC | PIN |