HCM0903L-15R27

RYD HCM0903L-15R27 is a Passive Electromagnetic Buzzer with Φ9×5.5mm dimensions, requiring external square-wave drive at 2731Hz to achieve 85dB SPL. Rated coil impedance is 15Ω; maximum current of 80mA is specified at 3Vp-p, 50% duty cycle drive. Operating drive amplitude range is 2.0–5.0Vp-p, defining the safe input signal window rather than self-starting capability. PBT housing provides mechanical stability for wave-soldering processes. Suited to battery-powered and regulated-rail designs where external MCU or timer-generated PWM signals are available. RoHS compliant materials. Customization available: operating frequency adjustment and lead wire length per application specification.