MURATA PKMCS0909E4000-R1 surface mount piezoelectric buzzer family measures 9x9mm and fully withstands reflow soldering without the slightest degradation in performance. Device delivers an extremely low profile of 1.9mm, while maintaining a loudness of 65dB minimum at 4kHz (with a battery friendly drive voltage of +/-1.5Vo-p).Louder sound output is possible with higher drive voltage.
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