Mallory Sonalert Products SC110HR Piezo Buzzer

The Mallory Sonalert SC110HR is a panel-mount piezo buzzer/indicator rated for 30–120 V operation, designed for industrial alarms and status indication. An internally driven piezo element operates at about 4.5 kHz, draws 6–21 mA, and delivers around 68 dB at 30 V (2 ft), with louder output at higher voltages (up to 80 dB at 120 Vdc). The 42.85 mm diameter housing mounts on a panel with a front-thread that fits a standard 1.25" panel hole, and it uses a panel-mount screw terminal plus 0.250" quick-connect tabs. Weight is about 45 g (1.6 oz), operating temperature range is -30°C to +65°C, and the enclosure is black 6/6 nylon.