Piezoelectric/ceramic Transducer  , Annunciator  Alarm  

(  External Circuitry  Type , All with RoHs )

YY1440A

YY1740A

HY1770

HY2280A

HY2212A

YY2450A

HY2310A

YY3055A

YY3510A

HY40A16

     HCT12C

HCT14C

HY22P

HY2410A

YY4216A

YY3017A

Piezoelectric/ceramic Buzzer, Piezo audio indicators 

( Internal Circuitry Type ,  All with RoHs )

HY1470X

HY2310X

HY2316X

HY2318X

YY2312X

YY3020X

YY3025X

YY4216AX

YY4216BX

YY42C220W

HY43A33X

HY4020AX