Audio 2VDC 5VDC 12mA 85dBA 3200Hz to 4200Hz Pin Through Hole
压电 指示灯，内部驱动 10mA 3.9kHz 85dB @ 2V，30cm 通孔 PC 引脚
得捷:
BUZZER PIEZO 23MM TH
艾睿:
Audio Indicator Piezo 2VDC 5VDC 10mA 85dBA 3400Hz to 4400Hz Through Hole Pin Bulk/Tray
Allied Electronics:
Alarm; 2-5 VDC; 80-89 dBa; 3900 Hz; 10mA; 23.0 x 10.5 mm; Not Sealed
MASTER:
Audio 2VDC 5VDC 10mA 85dBAdBA 3400Hz to 4400Hz Through Hole Pin Bulk/Tray