Alarms, Buzzers, and Sirens

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	Driver Circuitry	Input Type	Voltage - Rated	Voltage Range	Frequency	Technology	Operating Mode	Duration	Sound Pressure Level (SPL)	Current - Supply	Port Location	Operating Temperature	Approval Agency	Ratings	Mounting Type	Termination	Size / Dimension	Height - Seated (Max)
PKM22EPH2002 BUZZER PIEZO 22MM TH Murata Electronics	0 In Stock	270 : kr 4,65278 Bulk	PiezoRinger®	Bulk	Obsolete	Transducer, Externally Driven	Zero-Peak Signal	-	25V (Max)	2kHz	Piezo	Ringer	-	75dB @ 1.5V, 10cm	-	Top	-20°C ~ 70°C	-	-	Through Hole	PC Pins	0.866" Dia (22.00mm)	0.453" (11.50mm)
PKM22EPH2003 BUZZER PIEZO 22MM TH Murata Electronics	0 In Stock	270 : kr 5,12659 Bulk	PiezoRinger®	Bulk	Obsolete	Transducer, Externally Driven	Zero-Peak Signal	-	25V (Max)	2kHz	Piezo	Ringer	-	75dB @ 1.5V, 10cm	-	Top	-20°C ~ 70°C	-	-	Through Hole	PC Pins	0.866" Dia (22.00mm)	0.453" (11.50mm)
PKM22EPTH2002-B0 BUZZER PIEZO 22X7MM W TH Murata Electronics	0 In Stock	Active	PiezoRinger®	Bulk	Active	Transducer, Externally Driven	Zero-Peak Signal	-	25V (Max)	2kHz	Piezo	Ringer	-	70dB @ 3V, 10cm	-	Side	-20°C ~ 70°C	-	-	Through Hole	PC Pins	0.866" L x 0.276" W (22.00mm x 7.00mm)	1.063" (27.00mm)
PKM33EPH1202C BUZZER PIEZO 30V 33MM TH Murata Electronics	0 In Stock	Obsolete	PiezoRinger®	Bulk	Obsolete	Transducer, Externally Driven	Peak-Peak Signal	30 V	40V (Max)	1.2kHz	Piezo	Ringer	-	68dB @ 30V, 100cm	-	Top	-20°C ~ 70°C	-	-	Through Hole	PC Pins	1.299" Dia (33.00mm)	0.315" (8.00mm)

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Alarms, Buzzers, and Sirens are devices that produce an audible signal usually like a steady high-pitched hum that is encased within a molded housing. The characteristics are driver circuitry, input type, voltage rated, voltage range, frequency, technology, operating mode, current supply, and port location. The technology is electromechanical, magnetic, piezo, and piezo (with feedback) with a frequency from multiple, 200Hz to 8kHz.