SMA-21-S. Dimensions: D21x9.5mm. Frequency: 3.3kHz. Information: -. Mounting Type: SMD. Operating Mode: Continuous. Operating Voltage: 1.5-24V. Operating current: 38mA. Series: SMA. Sound pressure: 85dB. Termination: surface mount component (SMD). Original product from manufacturer: Sonitron. Quantity in stock updated on 13/11/2025, 13:51