HCM0903EPD

RYD HCM0903EPD is a Passive Electromagnetic Buzzer with Φ9×5.5mm dimensions, 85dB output at 2731Hz, 3V rated drive, and pin-type termination in a NORYL housing. This Passive Electromagnetic Buzzer requires an external driving signal to produce sound, allowing the host system to control tone frequency, pattern, and duration for multi-tone alert sequences or frequency-sweep indication. The external-drive architecture eliminates the built-in oscillator, reducing unit cost in high-volume applications where the driving circuit already exists on the host board. Suited to consumer electronics, industrial control panels, and IoT devices where programmable tone patterns and flexible alert signaling are required. RoHS compliant materials.